history in electronics

7/21/2019 History in Electronics

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ELECTRONICS I



MILESTONES IN ELEX

• Electronics is the ability tocontrol electron flow.

• 1897 - J.J. Thomson firstdiscovered the cathode rays.He conceptali!ed them to be

made p of particles smallerthan the atom-which werethen called the electrons.



• The "irst Thermionic #alve was invented in 19$% byJohn "lemin&.

• Even before theinvention'since 187%()

certain crystals were *nownto have rectifyin& abilities.+iodes were initially ,streferred to as rectifiers.



• The first triode valve was invented by ee+e "orest in 19$.These valves were thema,or components of

radios for many years."or this reason) the&y is called himself as/The "ather 0f adio2.



• The 3 element vacm tbe was made by addin& acontrol &rid to "lemin&2s valve. The device was

called /The 4dion2 with which we cold control theelectron flow. The 4dion however) cold notprovide electronic amplification. However) itformed the basis of the electronic amplifyin& triode.



• 5n 19%7) the first transistor was made. 5t was apoint contact transistor which cold amplify

electric si&nals. 5t was invented at 6ell abs by illiam hoc*ley'the father of the transistor:(alon& with John 6ardeen and alter 6rattain. The

term transistor was coined by John . ;ierce.



• The way 5 provided the name) was to thin* of what the device did. 4nd at that time) it wasspposed to be the dal of the vacm tbe. The

vacm tbe had transcondctance) so thetransistor wold have /transresistance.2 4nd thename shold fit in with the names of otherdevices) sch as varistor and thermistor. 4nd. . . 5s&&ested the name /transistor.2

-John . ;ierce) interviewed for

;6 show Transistori!ed<:

http://www.pbs.org/transistor/album1/pierce/index.html

http://www.pbs.org/transistor/album1/pierce/index.html



• 5t was in 19=% when >ordon Teal at Te?as5nstrments created the first @ommercial iliconTransistor. >ordon Teal be&an his research atTe?as 5nstrments after leavin& 6ell abs.;revios stdies and inventions were already

boomin& at 6ell labs. 6t perhaps) 6ell abs didnot consider it a device too fancy for commercialprodction.



1958

• Jac* Ailby invented the first5nte&rated @ircit'5@( while wor*in& for Te?as5nstrments. He is also thedaddy of the first handheld

calclator B the first thermalprinter.



• 5n 1971) 5ntel introdces the first @;C on a chip-the first Dicroprocessor. amed The 5ntel %$$%)it was a %-bit @;C and was thefirst commercially available microprocessor.



Matter

• 4tomF ;roton) etron

and Electron

• 4tomic mber

• Electron hells

and 0rbits



• #alence Electrons

• 5oni!ation

• mber of Electronsin each shell G

•



• @ondctors) emicondctors) and 5nslators

• Ener&y bands

history in electronics

Documents

term transistor

commercial silicon transistor

bell labs

point contact transistor

texas instruments

john bardeen

john fleming

reduced costs