power electronics corporate genealogy · 2011-06-29 · argus technology computer products asea...
TRANSCRIPT
Power Electronics Corporate Genealogy
ada cheng Page 1 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
A-SystemsABBAcbel PolytechAcopian TechnicalActive PowerActive SemiconductorAdvanced Analogic TechAllgemeine Elektricitat Gesellschaft (AEG)AEG Power SolutionsAlcatel-LucentAllegro MicrosystemsAmelco SemiconductorAmerican MicrosystemsAmerican Power ConversionAnalog DevicesApex MicrotechnologyAPtronicApplied Plasma PhysicsArgus TechnologyComputer ProductsAsea Allmanna Svenska Elektrika AktiebolagetASEA Power SystemsAstec PowerAstrodyneAultAura SystemsAutomatic ElectricBalmarBasler Electric CompanyBear Power SuppliesBeckman InstrumentsBelFuse/BelPowerBell LabsBellnixBenchmarq MicroelectronicsBendixBest Power TechnologyBeta DyneBias Power TechnologyBikorBoschert Inc.Bothhand EnterpriseBournsBrown Boveri & CieBurle TechnologiesBurr BrownBussmannC&D TechnologiesCalex ManufacturingCatalyst SemiconductorCherokee InternationalCherry SemiconductorChicony Electronics
Power Electronics Corporate Genealogy
ada cheng Page 2 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Patil SystemsClevite Transistor ProductsClaude LyonsCogniPowerGTI Power SystemsCombined TechnologiesCommunication Instruments Inc (CII Technologies)Communications & Power IndustriesCompagnie des Freins et SignauxCondor DC Power SuppliesControlled PowerC&E CooperCooper-HewittELCOCPI InternationalCreeCutter Electric & ManufacturingCyberPower SystemsDallas SemiconductorDelcoDelta ElectronicsDensei-Lambdadi/dtDigitronicsDiodesETA Electronics IndustryETM ElectromaticTobersen Gear and AxleEdal IndustriesEdison General Electric Merged with Thomson-Houston to form GEEdison Light Company Merged with other Edison companies to form Edison General ElectricElantec SemiconductorElectromanufactuas, S.A. de C.V. (EMSA)Electronic Transistors (ETCo)Electronic SpecialistsElectrowattEltek EnergyEltek SemiconductorEltek ValereEmerson Network PowerEMRISEEnerproEricsson EUPECExarExide Electronics GroupExide TechnologiesFairchild SemiconductorFalcon ElectricFayetteville TransformerFerranti LtdFerranti Hammond Electric LightFerranti, Thompson and Ince
1833
Power Electronics Corporate Genealogy
ada cheng Page 3 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Freescale SemiconductorFriemann & Wolf Duisburg (FRIWO)Friemann & Wolf Gerätebau (FRIWO)FSP GroupFurman SoundGaia ConverterGalaxy PowerGEC Plessey SemiconductorsGeneral Atomics Energy ProductsGeneral ElectricGeneral InstrumentsGeneral MicroelectronicsGeneral SemiconductorGeneral Telephone and ElectronicsGeneral TransistorGeneral TransistorGermanium ProductsGould Storage BatteryHackbridge and Hewittic Electric Co., Ltd.Harris (Semiconductor)Electric Heating ApparatusHind Rectifiers LtdHipro ElectronicsHitachiHoneywellHuntkey Enterprise GroupHytek MicrosystemsComputing-Tabulating-Recording (C-T-R)InfineonInterdesignInternational RectifierIntersilInvensysITE ImperialIXYSiWattJenkins Electric CompanyJJ ElectronicKearneyKemetKepcoKyle CorporationLambda ElectronicsLeader ElectronicsLiebertLine MaterialLineage PowerLinear TechnologyLite-On TechnologyLittlefuseLitton Engineering LaboratoriesMagnetekMarvell Technology
Power Electronics Corporate Genealogy
ada cheng Page 4 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Maxim Integrated ProductsMaxwell LaboratoriesMcGraw ElectricMcGraw-EdisonMean Well EnterprisesMicrelMicro-RelMicrochip TechnologyMicro LinearMicroPlanet TechnologyMicrosemiconductorMitelMitsubishi ElectricMobiletron ElectronicsMolectro ScienceMonolithic Power SystemsMotorolaMS KennedyMurata ManufacturingNatel EngineeringNational SemiconductorNational Union RadioNEMIC (Nippon Electronic Memory Industry Company)NEMIC-LambdaNetPower TechnologiesNXP SemiconductorO2MicroOki Power TechOmniRelON SemiconductorOnLine PowerOptimum Power ConversionOpto 22Oryx TechnologyPacific SemiconductorsPartner TechnologiesPascall ElectronicsPECO IIPennsylvania Transformer TechnologyPhihongPhilcoPhilco Ford MicroelectronicsPhilips (Semiconductor)PhotonisPicor (Vicor)Pioneer MagneticsPlesseyPower-OnePower ParagonPower TrendsPowerBrightPowerDsinePowerex
Power Electronics Corporate Genealogy
ada cheng Page 5 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Precision MonolithicsPrimarionProgrammable Power SupplyPULSPulse EngineeringQ.R.S. MusicQspeed SemiconductorQuantex CapitalRadiationRadio Corporation of America (RCA)Radio Electronics & Television Manufacturers Association (RETMA)Radio Receptor RaytheonRenesas TechnologyREORheem SemiconductorRO AssociatesRockwell MicroelectronicsRTES. Z. de Ferranti Went into receivershipSalcompSamlex AmericaSamsungToho Sanken ElectricSatCon Technology SB ElectronicsSchneider ElectricSchrackSeletron SetecSGS-FairchildSGS-MicroelecttronicaSGS-ThompsonShindengen Electric ManufacturingShockley TransistorSiebeSiemens Telegraphen-Bau-Anstalt von Siemens & HalskeSigneticsSilcon A/SSilicon General SemiconductorsSilicon LinkSiliconixSipexG-L ElectronicsSL Power ElectronicsSmartPower SystemsSociété Generale Semiconduttori (SGS)Sola ElectricSola/Hevi-DutySolomonSolomon TechnologiesTokyo Tsushin Kogyo (Tokyo Telecommunications Engineering Company)SPD Technologies
1836
18191847
Power Electronics Corporate Genealogy
ada cheng Page 6 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Sprague Electric Sprague Electric Railway and Motor CompanyStaco Energy ProductsSummit MicroelectronicsSylvaniaSynqorTamuraTDI PowerTDKTeccor ElectronicsTechnitrolTelcom SemiconductorTeledyneTelefunken ElectronicTEMIC SemiconductorsTeridian Semiconductor (TSC)TESLAcoTexas InstrumentsThalesThomson SemiconducteursThomson-HoustonToshibaTranformer and Electrical Company Ltd (TEC)Transistor ProductsTransitronTRW LSITsi Power TycoTyco ElectronicsUS DigitalUnison TechnologyUnitechUnitrodeValere PowerVarian AssociatesVeecoVicorVincotechVirginia TransformerVishayVolterra SemiconductorVPTWDC TechnologiesWestern Electric ManufacturingWestinghouse Electric & ManufacturingXandexXantrex TechnologyMitel SemiconductorsZeftronicsZetex SemiconductorsZilker Labs
1869
Power Electronics Corporate Genealogy
ada cheng Page 7 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
A-SystemsABBAcbel PolytechAcopian TechnicalActive PowerActive SemiconductorAdvanced Analogic TechAllgemeine Elektricitat Gesellschaft (AEG)AEG Power SolutionsAlcatel-LucentAllegro MicrosystemsAmelco SemiconductorAmerican MicrosystemsAmerican Power ConversionAnalog DevicesApex MicrotechnologyAPtronicApplied Plasma PhysicsArgus TechnologyComputer ProductsAseaASEA Power SystemsAstec PowerAstrodyneAultAura SystemsAutomatic ElectricBalmarBasler Electric CompanyBear Power SuppliesBeckman InstrumentsBelFuse/BelPowerBell LabsBellnixBenchmarq MicroelectronicsBendixBest Power TechnologyBeta DyneBias Power TechnologyBikorBoschert Inc.Bothhand EnterpriseBournsBrown Boveri & CieBurle TechnologiesBurr BrownBussmannC&D TechnologiesCalex ManufacturingCatalyst SemiconductorCherokee InternationalCherry SemiconductorChicony Electronics
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Sprague Semiconductor
Merged into General Telephone
Acquired by Max McGraw (later McGraw-Edison)
Power Electronics Corporate Genealogy
ada cheng Page 8 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Patil SystemsClevite Transistor ProductsClaude LyonsCogniPowerGTI Power SystemsCombined TechnologiesCommunication Instruments Inc (CII Technologies)Communications & Power IndustriesCompagnie des Freins et SignauxCondor DC Power SuppliesControlled PowerC&E CooperCooper-HewittELCOCPI InternationalCreeCutter Electric & ManufacturingCyberPower SystemsDallas SemiconductorDelcoDelta ElectronicsDensei-Lambdadi/dtDigitronicsDiodesETA Electronics IndustryETM ElectromaticTobersen Gear and AxleEdal IndustriesEdison General ElectricEdison Light CompanyElantec SemiconductorElectromanufactuas, S.A. de C.V. (EMSA)Electronic Transistors (ETCo)Electronic SpecialistsElectrowattEltek EnergyEltek SemiconductorEltek ValereEmerson Network PowerEMRISEEnerproEricsson EUPECExarExide Electronics GroupExide TechnologiesFairchild SemiconductorFalcon ElectricFayetteville TransformerFerranti LtdFerranti Hammond Electric LightFerranti, Thompson and Ince
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Cleveland Graphic Bronze; later Clevite Corp.
Acquired by GE
Communication & Power Industries
Changed name to I-T-E Circuit Breaker
Acquired by United Motors
Power Electronics Corporate Genealogy
ada cheng Page 9 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Freescale SemiconductorFriemann & Wolf Duisburg (FRIWO)Friemann & Wolf Gerätebau (FRIWO)FSP GroupFurman SoundGaia ConverterGalaxy PowerGEC Plessey SemiconductorsGeneral Atomics Energy ProductsGeneral ElectricGeneral InstrumentsGeneral MicroelectronicsGeneral SemiconductorGeneral Telephone and ElectronicsGeneral TransistorGeneral TransistorGermanium ProductsGould Storage BatteryHackbridge and Hewittic Electric Co., Ltd.Harris (Semiconductor)Electric Heating ApparatusHind Rectifiers LtdHipro ElectronicsHitachiHoneywellHuntkey Enterprise GroupHytek MicrosystemsComputing-Tabulating-Recording (C-T-R)InfineonInterdesignInternational RectifierIntersilInvensysITE ImperialIXYSiWattJenkins Electric CompanyJJ ElectronicKearneyKemetKepcoKyle CorporationLambda ElectronicsLeader ElectronicsLiebertLine MaterialLineage PowerLinear TechnologyLite-On TechnologyLittlefuseLitton Engineering LaboratoriesMagnetekMarvell Technology
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Merged with Automatic Electric
Kemet Laboratories
Acquired by Line Material
Acquired by McGraw Electric
Litton Industries
Power Electronics Corporate Genealogy
ada cheng Page 10 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Maxim Integrated ProductsMaxwell LaboratoriesMcGraw ElectricMcGraw-EdisonMean Well EnterprisesMicrelMicro-RelMicrochip TechnologyMicro LinearMicroPlanet TechnologyMicrosemiconductorMitelMitsubishi ElectricMobiletron ElectronicsMolectro ScienceMonolithic Power SystemsMotorolaMS KennedyMurata ManufacturingNatel EngineeringNational SemiconductorNational Union RadioNEMIC (Nippon Electronic Memory Industry Company)NEMIC-LambdaNetPower TechnologiesNXP SemiconductorO2MicroOki Power TechOmniRelON SemiconductorOnLine PowerOptimum Power ConversionOpto 22Oryx TechnologyPacific SemiconductorsPartner TechnologiesPascall ElectronicsPECO IIPennsylvania Transformer TechnologyPhihongPhilcoPhilco Ford MicroelectronicsPhilips (Semiconductor)PhotonisPicor (Vicor)Pioneer MagneticsPlesseyPower-OnePower ParagonPower TrendsPowerBrightPowerDsinePowerex
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Merged with Pennsylvania Transformer
Microsemiconductor
Changed name to National Union Electric
Hughes Semiconductor Division
Power Electronics Corporate Genealogy
ada cheng Page 11 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Precision MonolithicsPrimarionProgrammable Power SupplyPULSPulse EngineeringQ.R.S. MusicQspeed SemiconductorQuantex CapitalRadiationRadio Corporation of America (RCA)Radio Electronics & Television Manufacturers Association (RETMA)Radio Receptor RaytheonRenesas TechnologyREORheem SemiconductorRO AssociatesRockwell MicroelectronicsRTES. Z. de FerrantiSalcompSamlex AmericaSamsungToho Sanken ElectricSatCon Technology SB ElectronicsSchneider ElectricSchrackSeletron SetecSGS-FairchildSGS-MicroelecttronicaSGS-ThompsonShindengen Electric ManufacturingShockley TransistorSiebeSiemensSigneticsSilcon A/SSilicon General SemiconductorsSilicon LinkSiliconixSipexG-L ElectronicsSL Power ElectronicsSmartPower SystemsSociété Generale Semiconduttori (SGS)Sola ElectricSola/Hevi-DutySolomonSolomon TechnologiesTokyo Tsushin Kogyo (Tokyo Telecommunications Engineering Company)SPD Technologies
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Tokyo Tsushin Kogyo (Tokyo Telecommunications Engineering Company)
Power Electronics Corporate Genealogy
ada cheng Page 12 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Sprague ElectricStaco Energy ProductsSummit MicroelectronicsSylvaniaSynqorTamuraTDI PowerTDKTeccor ElectronicsTechnitrolTelcom SemiconductorTeledyneTelefunken ElectronicTEMIC SemiconductorsTeridian Semiconductor (TSC)TESLAcoTexas InstrumentsThalesThomson SemiconducteursThomson-HoustonToshibaTranformer and Electrical Company Ltd (TEC)Transistor ProductsTransitronTRW LSITsi Power TycoTyco ElectronicsUS DigitalUnison TechnologyUnitechUnitrodeValere PowerVarian AssociatesVeecoVicorVincotechVirginia TransformerVishayVolterra SemiconductorVPTWDC TechnologiesWestern Electric ManufacturingWestinghouse Electric & ManufacturingXandexXantrex TechnologyMitel SemiconductorsZeftronicsZetex SemiconductorsZilker Labs
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Power Electronics Corporate Genealogy
ada cheng Page 13 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
A-SystemsABBAcbel PolytechAcopian TechnicalActive PowerActive SemiconductorAdvanced Analogic TechAllgemeine Elektricitat Gesellschaft (AEG)AEG Power SolutionsAlcatel-LucentAllegro MicrosystemsAmelco SemiconductorAmerican MicrosystemsAmerican Power ConversionAnalog DevicesApex MicrotechnologyAPtronicApplied Plasma PhysicsArgus TechnologyComputer ProductsAseaASEA Power SystemsAstec PowerAstrodyneAultAura SystemsAutomatic ElectricBalmarBasler Electric CompanyBear Power SuppliesBeckman InstrumentsBelFuse/BelPowerBell LabsBellnixBenchmarq MicroelectronicsBendixBest Power TechnologyBeta DyneBias Power TechnologyBikorBoschert Inc.Bothhand EnterpriseBournsBrown Boveri & CieBurle TechnologiesBurr BrownBussmannC&D TechnologiesCalex ManufacturingCatalyst SemiconductorCherokee InternationalCherry SemiconductorChicony Electronics
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Acquired by Diamler Benz
Sprague Semiconductor Acquired by Sanken ElectricRenamed Teledyne Semiconductor Spun out of Teledyne as Telcom Semiconductor
American Microsystems
Computer Products Renamed Artesyn TechnologiesMerged with Brown Boveri & Cie to form ABB
Merged into General Telephone
BelPower foundedSpun out of AT&T as part of AT&T Technologies; later Lucent Technologies
Acquired by Allied Corp.Acquired by General Signal
? Acquired by Microsemi Acquired by Cherokee InternationalAcquired by Computer Products (Artesyn)
Merged with ASEA to form ABB
Power Electronics Corporate Genealogy
ada cheng Page 14 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Patil SystemsClevite Transistor ProductsClaude LyonsCogniPowerGTI Power SystemsCombined TechnologiesCommunication Instruments Inc (CII Technologies)Communications & Power IndustriesCompagnie des Freins et SignauxCondor DC Power SuppliesControlled PowerC&E CooperCooper-HewittELCOCPI InternationalCreeCutter Electric & ManufacturingCyberPower SystemsDallas SemiconductorDelcoDelta ElectronicsDensei-Lambdadi/dtDigitronicsDiodesETA Electronics IndustryETM ElectromaticTobersen Gear and AxleEdal IndustriesEdison General ElectricEdison Light CompanyElantec SemiconductorElectromanufactuas, S.A. de C.V. (EMSA)Electronic Transistors (ETCo)Electronic SpecialistsElectrowattEltek EnergyEltek SemiconductorEltek ValereEmerson Network PowerEMRISEEnerproEricsson EUPECExarExide Electronics GroupExide TechnologiesFairchild SemiconductorFalcon ElectricFayetteville TransformerFerranti LtdFerranti Hammond Electric LightFerranti, Thompson and Ince
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Acquired by ITT
Acquired by RTE
Spun out of Varian AssociatesAcquired by Société de Mécanique et de Chaudronnerie de Pons (SMCP)
Acquired by SL Industries
Merged with Imperial-Eastman to become ITE Imperial
Acquired by Siemens
Merger of Siemens & AEG divisions
Acquired by BTR
Acquired by National SemiconductorSpun out of National Semiconductor
Microelectronics sold to plesseyBankrupt
Power Electronics Corporate Genealogy
ada cheng Page 15 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Freescale SemiconductorFriemann & Wolf Duisburg (FRIWO)Friemann & Wolf Gerätebau (FRIWO)FSP GroupFurman SoundGaia ConverterGalaxy PowerGEC Plessey SemiconductorsGeneral Atomics Energy ProductsGeneral ElectricGeneral InstrumentsGeneral MicroelectronicsGeneral SemiconductorGeneral Telephone and ElectronicsGeneral TransistorGeneral TransistorGermanium ProductsGould Storage BatteryHackbridge and Hewittic Electric Co., Ltd.Harris (Semiconductor)Electric Heating ApparatusHind Rectifiers LtdHipro ElectronicsHitachiHoneywellHuntkey Enterprise GroupHytek MicrosystemsComputing-Tabulating-Recording (C-T-R)InfineonInterdesignInternational RectifierIntersilInvensysITE ImperialIXYSiWattJenkins Electric CompanyJJ ElectronicKearneyKemetKepcoKyle CorporationLambda ElectronicsLeader ElectronicsLiebertLine MaterialLineage PowerLinear TechnologyLite-On TechnologyLittlefuseLitton Engineering LaboratoriesMagnetekMarvell Technology
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Acquired by CEAGChanged name to FRIWO
GE Solid State sold to HarrisSpun out microelectronics group as Microchip Technology
Acquired by Philco-Ford Microelectronics
Merged with Automatic ElectricAcquired by General Instruments
Acquired by Japan Energy
Merged with Sola Electric to form Sola Hevi-DutyAlso known as Hirec
?? Not sure when founded
Monochip brand Acquired by Ferranti
Acquired by GE
Acquired by Gould
Acquired by Cooper Power Systems
Acquired by Veeco
Acquired by Emerson
Litton Industries
Power Electronics Corporate Genealogy
ada cheng Page 16 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Maxim Integrated ProductsMaxwell LaboratoriesMcGraw ElectricMcGraw-EdisonMean Well EnterprisesMicrelMicro-RelMicrochip TechnologyMicro LinearMicroPlanet TechnologyMicrosemiconductorMitelMitsubishi ElectricMobiletron ElectronicsMolectro ScienceMonolithic Power SystemsMotorolaMS KennedyMurata ManufacturingNatel EngineeringNational SemiconductorNational Union RadioNEMIC (Nippon Electronic Memory Industry Company)NEMIC-LambdaNetPower TechnologiesNXP SemiconductorO2MicroOki Power TechOmniRelON SemiconductorOnLine PowerOptimum Power ConversionOpto 22Oryx TechnologyPacific SemiconductorsPartner TechnologiesPascall ElectronicsPECO IIPennsylvania Transformer TechnologyPhihongPhilcoPhilco Ford MicroelectronicsPhilips (Semiconductor)PhotonisPicor (Vicor)Pioneer MagneticsPlesseyPower-OnePower ParagonPower TrendsPowerBrightPowerDsinePowerex
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Merged with Pennsylvania Transformer
Spun out of General Instruments
Microsemiconductor Changed name to MicrosemiAcquired Siltex for semis start
Spun out Fairchild SemiconductorChanged name to National Union ElectricMerged with Eureka-Williams Acquired by Electrolux
Hughes Semiconductor Division
Acquired by Intelek
Acquired by Ford Motor Company (now Visteon)
Semis began Acquired by GEC & Siemens AG consortium
Acquired by SPD Technologies
Power Electronics Corporate Genealogy
ada cheng Page 17 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Precision MonolithicsPrimarionProgrammable Power SupplyPULSPulse EngineeringQ.R.S. MusicQspeed SemiconductorQuantex CapitalRadiationRadio Corporation of America (RCA)Radio Electronics & Television Manufacturers Association (RETMA)Radio Receptor RaytheonRenesas TechnologyREORheem SemiconductorRO AssociatesRockwell MicroelectronicsRTES. Z. de FerrantiSalcompSamlex AmericaSamsungToho Sanken ElectricSatCon Technology SB ElectronicsSchneider ElectricSchrackSeletron SetecSGS-FairchildSGS-MicroelecttronicaSGS-ThompsonShindengen Electric ManufacturingShockley TransistorSiebeSiemensSigneticsSilcon A/SSilicon General SemiconductorsSilicon LinkSiliconixSipexG-L ElectronicsSL Power ElectronicsSmartPower SystemsSociété Generale Semiconduttori (SGS)Sola ElectricSola/Hevi-DutySolomonSolomon TechnologiesTokyo Tsushin Kogyo (Tokyo Telecommunications Engineering Company)SPD Technologies
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Acquired by Analog Devices
Acquired by Bel Fuse
Beddis InternationalAcquired by Harris
Acquired by GE
Acquired by General Instruments
Acquired by Raytheon
Acquired by Cooper
Acquired by Nokia
Acquired by Siemens (Electromechanical Components)
Changed name to STMicroelectronics
Acquired by Philips
Acquired by SymmetriCon
Acquired by Vishay
Went public as G-L IndustriesChanged name to SGL Industries Renamed SL Industries
Acquired by Basic Products
Tokyo Tsushin Kogyo (Tokyo Telecommunications Engineering Company)
Power Electronics Corporate Genealogy
ada cheng Page 18 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Sprague ElectricStaco Energy ProductsSummit MicroelectronicsSylvaniaSynqorTamuraTDI PowerTDKTeccor ElectronicsTechnitrolTelcom SemiconductorTeledyneTelefunken ElectronicTEMIC SemiconductorsTeridian Semiconductor (TSC)TESLAcoTexas InstrumentsThalesThomson SemiconducteursThomson-HoustonToshibaTranformer and Electrical Company Ltd (TEC)Transistor ProductsTransitronTRW LSITsi Power TycoTyco ElectronicsUS DigitalUnison TechnologyUnitechUnitrodeValere PowerVarian AssociatesVeecoVicorVincotechVirginia TransformerVishayVolterra SemiconductorVPTWDC TechnologiesWestern Electric ManufacturingWestinghouse Electric & ManufacturingXandexXantrex TechnologyMitel SemiconductorsZeftronicsZetex SemiconductorsZilker Labs
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Acquired by Vishay
Merged with General Telephone
Merged with SGS Microelectronica to form SGS-Thompson
Acquired by Raytheon Semiconductors
???? Acquired by Siebe
Acquired by Unitech
Lucent Technologies
Power Electronics Corporate Genealogy
ada cheng Page 19 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
A-SystemsABBAcbel PolytechAcopian TechnicalActive PowerActive SemiconductorAdvanced Analogic TechAllgemeine Elektricitat Gesellschaft (AEG)AEG Power SolutionsAlcatel-LucentAllegro MicrosystemsAmelco SemiconductorAmerican MicrosystemsAmerican Power ConversionAnalog DevicesApex MicrotechnologyAPtronicApplied Plasma PhysicsArgus TechnologyComputer ProductsAseaASEA Power SystemsAstec PowerAstrodyneAultAura SystemsAutomatic ElectricBalmarBasler Electric CompanyBear Power SuppliesBeckman InstrumentsBelFuse/BelPowerBell LabsBellnixBenchmarq MicroelectronicsBendixBest Power TechnologyBeta DyneBias Power TechnologyBikorBoschert Inc.Bothhand EnterpriseBournsBrown Boveri & CieBurle TechnologiesBurr BrownBussmannC&D TechnologiesCalex ManufacturingCatalyst SemiconductorCherokee InternationalCherry SemiconductorChicony Electronics
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009Most Recent Name
AEG
Spun out of Teledyne as Telcom SemiconductorRenamed AMI Semiconductor Acquired by On SemiconductorAMI Semiconductor
Acquired by Schneider Electric
Acquired by Cirrus Logic
Renamed Artesyn Technologies Acquired by EmersonArtsyn TechnologiesMerged with Brown Boveri & Cie to form ABB
Acquired by Emerson
Acquired by SL Industries
Spun out of AT&T as part of AT&T Technologies; later Lucent Technologies Lucent Technologies
Acquired by Unitrode
Acquired by General Signal
Acquired by Cherokee International
Acquired by PhotonisAcquired by Texas Instruments
McGraw-Edison
Acquired by On SemiconductorAcquired by Lineage Power
Acquired by On Semiconductor
Power Electronics Corporate Genealogy
ada cheng Page 20 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Patil SystemsClevite Transistor ProductsClaude LyonsCogniPowerGTI Power SystemsCombined TechnologiesCommunication Instruments Inc (CII Technologies)Communications & Power IndustriesCompagnie des Freins et SignauxCondor DC Power SuppliesControlled PowerC&E CooperCooper-HewittELCOCPI InternationalCreeCutter Electric & ManufacturingCyberPower SystemsDallas SemiconductorDelcoDelta ElectronicsDensei-Lambdadi/dtDigitronicsDiodesETA Electronics IndustryETM ElectromaticTobersen Gear and AxleEdal IndustriesEdison General ElectricEdison Light CompanyElantec SemiconductorElectromanufactuas, S.A. de C.V. (EMSA)Electronic Transistors (ETCo)Electronic SpecialistsElectrowattEltek EnergyEltek SemiconductorEltek ValereEmerson Network PowerEMRISEEnerproEricsson EUPECExarExide Electronics GroupExide TechnologiesFairchild SemiconductorFalcon ElectricFayetteville TransformerFerranti LtdFerranti Hammond Electric LightFerranti, Thompson and Ince
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009Most Recent NameCirrus Logic
Acquired by FlextronicsColdwatt
Acquired by TycoSpun out of Varian Associates
Acquired by SL Industries
Cooper Industries
Cosel
Acquired by Maxim Integrated Products
Acquired by TDKAcquired by Power-One
Eaton
Acquired by IntersilAcquired by Cooper Power Systems
Acquired by SiemensMerged with Valere Power
Acquired by Infineon
Acquired by BTR
Spun out of National Semiconductor
Power Electronics Corporate Genealogy
ada cheng Page 21 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Freescale SemiconductorFriemann & Wolf Duisburg (FRIWO)Friemann & Wolf Gerätebau (FRIWO)FSP GroupFurman SoundGaia ConverterGalaxy PowerGEC Plessey SemiconductorsGeneral Atomics Energy ProductsGeneral ElectricGeneral InstrumentsGeneral MicroelectronicsGeneral SemiconductorGeneral Telephone and ElectronicsGeneral TransistorGeneral TransistorGermanium ProductsGould Storage BatteryHackbridge and Hewittic Electric Co., Ltd.Harris (Semiconductor)Electric Heating ApparatusHind Rectifiers LtdHipro ElectronicsHitachiHoneywellHuntkey Enterprise GroupHytek MicrosystemsComputing-Tabulating-Recording (C-T-R)InfineonInterdesignInternational RectifierIntersilInvensysITE ImperialIXYSiWattJenkins Electric CompanyJJ ElectronicKearneyKemetKepcoKyle CorporationLambda ElectronicsLeader ElectronicsLiebertLine MaterialLineage PowerLinear TechnologyLite-On TechnologyLittlefuseLitton Engineering LaboratoriesMagnetekMarvell Technology
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009Most Recent Name
Changed name to FRIWO FRIWO
Acquired by Panamax
Acquired by BelPowerAcquired by Mitel (eventually Zarlink Semiconductors)
Spun out microelectronics group as Microchip TechnologyAcquired by Motorola
Acquired by VishayGTE
Spun out as IntersilMerged with Sola Electric to form Sola Hevi-Duty Hevi-Duty Electric
Acquired by Chicony ElectronicsMerged into Renesas
Acquired by Natel EngineeringIBM
Acquired by Cooper Power Systems
Acquired/sold by Vishay
Acquired by Northrup GrummanLitton Industries
Power Electronics Corporate Genealogy
ada cheng Page 22 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Maxim Integrated ProductsMaxwell LaboratoriesMcGraw ElectricMcGraw-EdisonMean Well EnterprisesMicrelMicro-RelMicrochip TechnologyMicro LinearMicroPlanet TechnologyMicrosemiconductorMitelMitsubishi ElectricMobiletron ElectronicsMolectro ScienceMonolithic Power SystemsMotorolaMS KennedyMurata ManufacturingNatel EngineeringNational SemiconductorNational Union RadioNEMIC (Nippon Electronic Memory Industry Company)NEMIC-LambdaNetPower TechnologiesNXP SemiconductorO2MicroOki Power TechOmniRelON SemiconductorOnLine PowerOptimum Power ConversionOpto 22Oryx TechnologyPacific SemiconductorsPartner TechnologiesPascall ElectronicsPECO IIPennsylvania Transformer TechnologyPhihongPhilcoPhilco Ford MicroelectronicsPhilips (Semiconductor)PhotonisPicor (Vicor)Pioneer MagneticsPlesseyPower-OnePower ParagonPower TrendsPowerBrightPowerDsinePowerex
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009Most Recent Name
Acquired Dallas SemiconductorMaxwell Technologies
Acqired by Sirenza Microdevices
Microsemi
Acquired by Anaren
Spun out Fairchild SemiconductorNational Union Electric
Merged with Nippon Electric to form Densei
Acquired by International Rectifier
Acquired by Intelek
Acquired by GEC & Siemens AG consortium
Acquired by SPD TechnologiesAcquired by Texas Instruments
Power Electronics Corporate Genealogy
ada cheng Page 23 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Precision MonolithicsPrimarionProgrammable Power SupplyPULSPulse EngineeringQ.R.S. MusicQspeed SemiconductorQuantex CapitalRadiationRadio Corporation of America (RCA)Radio Electronics & Television Manufacturers Association (RETMA)Radio Receptor RaytheonRenesas TechnologyREORheem SemiconductorRO AssociatesRockwell MicroelectronicsRTES. Z. de FerrantiSalcompSamlex AmericaSamsungToho Sanken ElectricSatCon Technology SB ElectronicsSchneider ElectricSchrackSeletron SetecSGS-FairchildSGS-MicroelecttronicaSGS-ThompsonShindengen Electric ManufacturingShockley TransistorSiebeSiemensSigneticsSilcon A/SSilicon General SemiconductorsSilicon LinkSiliconixSipexG-L ElectronicsSL Power ElectronicsSmartPower SystemsSociété Generale Semiconduttori (SGS)Sola ElectricSola/Hevi-DutySolomonSolomon TechnologiesTokyo Tsushin Kogyo (Tokyo Telecommunications Engineering Company)SPD Technologies
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009Most Recent Name
Acquired by Infineon
Acquired by Bel Fuse Pulse
Beddis International
Electronics Industries Alliance (EIA)
Acquired by EMRISESpun out as Conexant Conexant
Sanken Electric
Acquired by Siemens (Electromechanical Components)
Changed name to STMicroelectronics STMicroelectronics
Merged with BTR to form Invensys
Acquired by SymmetriCon
SL Industries
Sony
Power Electronics Corporate Genealogy
ada cheng Page 24 6/13/11
Original Name 1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Sprague ElectricStaco Energy ProductsSummit MicroelectronicsSylvaniaSynqorTamuraTDI PowerTDKTeccor ElectronicsTechnitrolTelcom SemiconductorTeledyneTelefunken ElectronicTEMIC SemiconductorsTeridian Semiconductor (TSC)TESLAcoTexas InstrumentsThalesThomson SemiconducteursThomson-HoustonToshibaTranformer and Electrical Company Ltd (TEC)Transistor ProductsTransitronTRW LSITsi Power TycoTyco ElectronicsUS DigitalUnison TechnologyUnitechUnitrodeValere PowerVarian AssociatesVeecoVicorVincotechVirginia TransformerVishayVolterra SemiconductorVPTWDC TechnologiesWestern Electric ManufacturingWestinghouse Electric & ManufacturingXandexXantrex TechnologyMitel SemiconductorsZeftronicsZetex SemiconductorsZilker Labs
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009Most Recent Name
Acquired by Microchip
Acquired by Vishay
Merged with SGS Microelectronica to form SGS-Thompson
Acquired by Raytheon Semiconductors
Acquired by SiebeAcquired by Texas Instruments
Merged with Eltek Energy
Part of Lineage Holdings
Acquired by HEICO Corp
Acquired by Schneider Electric (inverters) and Ametek (programmable power unit).Zarlink Semiconductors
Acquired by DiodesAcquired by Intersil