ece 340 electronics i
DESCRIPTION
ECE 340 ELECTRONICS I. BJT APPLICATIONS AND BIASING. V S. R 1. V X. R 1. V S. V X. R 2. R 2. SHORTHAND CIRCUIT DIAGRAM. BJT REGIONS OF OPERATION. CUTOFF ACTIVE OR LINEAR SATURATION. R C. V B. V C. V CC. R B. Q1. V BB. V E. R E. NPN BJT BIAS CIRCUIT ANALYSIS. I C. -V CB +. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/1.jpg)
ECE 340ELECTRONICS I
BJT
APPLICATIONS AND BIASING
![Page 2: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/2.jpg)
SHORTHAND CIRCUIT DIAGRAM
VS
R1
R2
R1
R2
VX
VX
VS
![Page 3: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/3.jpg)
BJT REGIONS OF OPERATION
• CUTOFF
• ACTIVE OR LINEAR
• SATURATION
![Page 4: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/4.jpg)
NPN BJT BIAS CIRCUIT ANALYSIS
VE
VC
VB
RB
RE
Q1
RC
VBB
VCC
+ VBE -
-VCB+ +VCE
-IB
IC
IE
![Page 5: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/5.jpg)
NPN INPUT CIRCUIT ANALYSIS
EB
BEBBB
BE
EEBEBBBB
RR
VVI
II
RIVRIV
1
1
0
![Page 6: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/6.jpg)
NPN OUTPUT CIRCUIT ANALYSIS
EC
CECCC
CE
EECECCCC
RR
VVI
II
RIVRIV
0
![Page 7: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/7.jpg)
NPN DC VOLTAGES
EEE
BBBBB
CCCCC
RIV
RIVV
RIVV
![Page 8: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/8.jpg)
NPN REGIONS OF OPERATION
SATCECEBCEB
BCEB
CEB
VVVVandVVSATURATION
VVandVVLINEARorACTIVE
IVVCUTOFF
,:
:
0:
![Page 9: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/9.jpg)
NPN OPERATING LIMITS
CCMAXCEE
C
CCMAXC
EC
CCCE
EC
C
VVR
R
VI
RR
VV
RR
I
,,
1
![Page 10: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/10.jpg)
NPN OPERATING LIMITS
CCMAXCE
EC
MAXCECCMINCSATCEMINCE
EC
CCCE
EC
C
VV
RR
VVIVV
RR
VV
RR
I
,
,,,,
1
![Page 11: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/11.jpg)
PNP BIAS CIRCUIT ANALYSIS
VC
VEVB
QRB
RC
RE
VBB
VEE
IB
IE
IC
![Page 12: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/12.jpg)
PNP INPUT CIRCUIT ANALYSIS
EB
EBEEB
BE
BBBBEBEEEE
RR
VVI
II
VRIVRIV
1
1
0
![Page 13: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/13.jpg)
PNP OUTPUT CIRCUIT ANALYSIS
EC
ECEEC
CE
CCECEEEE
RR
VVI
II
RIVRIV
0
![Page 14: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/14.jpg)
PNP DC VOLTAGES
CCC
BBBBB
EEEEE
RIV
RIVV
RIVV
![Page 15: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/15.jpg)
PNP REGIONS OF OPERATION
SATECECBCEB
BCEB
CEB
VVVVandVVSATURATION
VVandVVLINEARorACTIVE
IVVCUTOFF
,:
:
0:
![Page 16: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/16.jpg)
PNP OPERATING LIMITS
EEMAXECE
C
EEMAXC
EC
EEEC
EC
C
VVR
R
VI
RR
VV
RR
I
,,
1
![Page 17: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/17.jpg)
PNP OPERATING LIMITS
EEMAXEC
EC
MAXECEEMINCSATECMINEC
EC
EEEC
EC
C
VV
RR
VVIVV
RR
VV
RR
I
,
,,,,
1
![Page 18: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/18.jpg)
SINGLE RESISTOR BIASING CIRCUIT
Q1
RB RC
VCC
ICIB
![Page 19: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/19.jpg)
SINGLE RESISTOR BIASING
• SETS BASE CURRENT
• DIRECTLY CONTROLLED BY SUPPLY VOLTAGE
![Page 20: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/20.jpg)
INPUT KVL EQUATION
B
BECCB
BEBBCC
BEBBCC
R
VVI
VRIV
VRIV
0
0
![Page 21: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/21.jpg)
INPUT LOAD LINE EQUATION
B
CCBEQ
BBQ
B
BECCB
R
VV
RI
R
VVI
1
![Page 22: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/22.jpg)
COLLECTOR CURRENT DEPENDENCE ON VBE
CCB
BEQB
CQ
B
BECCC
B
BECCB
VR
VR
I
R
VVI
R
VVI
![Page 23: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/23.jpg)
OUTPUT KVL EQUATION
CCCB
BEB
CCCE
CCCCCE
CECCCC
RVR
VR
VV
RIVV
VRIV
0
![Page 24: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/24.jpg)
OUTPUT LOAD LINE EQUATION
CB
BEQCCCCCEQ
CCCCCEQ
RR
VVVV
RIVV
![Page 25: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/25.jpg)
RESISTOR DIVIDER BIASING CIRCUIT
Q1
R1
RC
VCC
R2
IC
![Page 26: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/26.jpg)
VOLTAGE DIVIDER BIASING
• PROVIDES TWO METHODS OF DETERMINING BIAS CONDITIONS
• SETS VBE VOLTAGE
• SUPPRESSES DEPENDENCE ON β
![Page 27: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/27.jpg)
DIRECT METHOD
• FIND THEVENIN CIRCUIT AT BASE NODE
• CREATES INPUT CIRCUIT
![Page 28: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/28.jpg)
RESIDUAL CIRCUIT FROM THEVENIN CONVERSION
Q1
RC
VCC
VBB
RB
IB
IC
![Page 29: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/29.jpg)
INPUT EQUATION
B
BEBBB
BEBBBB
R
VVI
VRIV
0
![Page 30: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/30.jpg)
INPUT LOAD LINE EQUATION
B
BBBEQ
BBQ
B
BEBBB
R
VV
RI
R
VVI
1
![Page 31: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/31.jpg)
COLLECTOR CURRENT DEPENDANCE
BBB
BEQB
CQ
B
BEBBC
B
BEBBB
VR
VR
I
R
VVI
R
VVI
![Page 32: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/32.jpg)
OUTPUT EQUATION
C
CECCC
CECCCC
CECCCC
R
VVI
VRIV
VRIV
0
0
![Page 33: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/33.jpg)
OUTPUT EQUATION LOAD LINE
C
CCCEQ
CCQ
C
CECCC
R
VV
RI
R
VVI
1
![Page 34: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/34.jpg)
INDIRECT OR APPROXIMATE METHOD
• ASSUME IB ≈ 0
• VBE IS SET BY VOLTAGE DIVIDER
![Page 35: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/35.jpg)
INPUT EQUATION
T
CCSCC
T
BESCC
CCBE
V
V
RR
RII
V
VII
VRR
RV
21
2
21
2
exp
exp
![Page 36: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/36.jpg)
ITERATIVE METHOD FOR CONVERGENCE
SC
CTBE
T
CCSCC
T
BESCC
CC
BECCBE
I
IVV
V
V
RR
RII
V
VII
V
V
RR
RVandVChoose
ln
expexp
2
21
2
21
21
![Page 37: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/37.jpg)
ITERATIVE METHOD FOR CONVERGENCE
• SUBSTITUTE VBE2 FOR VBE1
• CONTINUE ITERATION UNTIL VBEN+1 ≈ VBEN
![Page 38: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/38.jpg)
VOLTAGE DIVIDER WITH EMITTER DEGENERATION
Q1
RC
VCC
RE
R1
R2
![Page 39: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/39.jpg)
RESULTANT CIRCUIT FROM THEVENIN CONVERSION
Q1
RC
VCC
RE
RB
VBB
![Page 40: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/40.jpg)
INPUT EQUATION
EB
BEBBB
BE
EEBEBBBB
RR
VVI
II
RIVRIV
1
1
0
![Page 41: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/41.jpg)
COLLECTOR CURRENT DEPENDENCE
E
BEBBCBE
BEEB
BBEB
C
EB
BEBBC
R
VVIRR
VRR
VRR
I
RR
VVI
1
11
1
![Page 42: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/42.jpg)
ITERATIVE METHOD
SC
CTBE
E
BEBBC
BECCBB
I
IVV
R
VVI
VChooseVRR
RV
ln2
1
121
2
![Page 43: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/43.jpg)
ITERATIVE METHOD FOR CONVERGENCE
• SUBSTITUTE VBE2 FOR VBE1
• CONTINUE ITERATION UNTIL VBEN+1 ≈ VBEN
![Page 44: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/44.jpg)
SELF-BIASED CIRCUIT
Q1
RC
VCC
RB
IB
![Page 45: ECE 340 ELECTRONICS I](https://reader035.vdocuments.mx/reader035/viewer/2022062315/56815a17550346895dc75f30/html5/thumbnails/45.jpg)
INPUT EQUATION
βR
VVI
RβR
VVI
RβR
VVβI
RβR
VVI
VRIRIβVVRIRIV
C
BECCC
CB
BECCC
CB
BECCC
CB
BECCB
BEBBCBCCBEBBCECC
large
11
1