Small Signal Amplifier tasks

LHAmp2.2

 

1 task


LHAmp1.1

VCC = 14V
VBE = 0,7V
R1 = 10kΩ
R2 = 5kΩ
RC = 1kΩ
RE = 1kΩ
RLOAD = 1kΩ
Rg = 50Ω
β = 200
gce = 2 ∗ 10 −5 S

C1 = 10μF
C2 = 47μF
CE = 4,7μF
rbb’ = 10Ω
Cb’e = 20pF
Cb’c = 3pF

IC = ?
gm = ?
VCE = ?
Rin = ?
Rout = ?
AV = ?
AVeff = ?
τ1 = ?
f1 = ?
τ2 = ?
f2 = ?
τ’E = ?
f’E = ?
τE = ?
fE = ?

Small Signal Amplifier Formulas:

small signal amplifier formulas 11

 small signal amplifier formulas 12

Medium frequencies:

small signal amplifier task formulas 10

LHAmp1.2

small signal amplifier task formulas 11

small signal amplifier task formulas 12

small signal amplifier task formulas 13

small signal amplifier task formulas 14

small signal amplifier task formulas 15

Low frequencies:

small signal amplifiers low frequencies

Scheme for obtaining Time Constant of the Coupling Capacitance C 1 :

small signal amplifier low frequencies

small signal amplifier task formulas 16

Scheme for obtaining Time Constant of the Coupling Capacitance C 2 :

small signal amplifier low frequencies

small signal amplifier task formulas 17

High frequencies – Scheme for obtaining Time Constant of the Blocking Capacitance C E :

small signal amplifier High frequencies

small signal amplifier task formulas 18

Logarithmic Amplitude Characteristic of the Amplifier:

Logarithmic Amplitude Characteristic of the Amplifier

2 task


Common Drain (CD) JFET Amplifier

Common Drain (CD) JFET Amplifier

EDD = 30V (+)
R = 100kΩ
RS = 1kΩ
Rg = 600Ω
RLOAD = 5kΩ
gm = 3mS

C1 = 0,1μF
C2 = 0,1μF
Cgs = 7pF
Cgd = 7pF

Rin = ?
Rout = ?
AV = ?
AVeff = ?

τ1 = ?
f1 = ?
τ2 = ?
f2 = ?
τup = ?
fup = ?

Small Signal Amplifier Formulas:

small signal amplifier formulas 21

Medium frequencies:

small signal amplifier medium frequencies

small signal amplifier task formulas 21small signal amplifier task formulas 22

Low frequencies:

LHAmp2.3

Scheme for obtaining Time Constant of the Coupling Capacitance C 1:

LHAmp2.4

small signal amplifier task formulas 23

Scheme for obtaining Time Constant of the Coupling Capacitance C2:

LHAmp2.5

small signal amplifier task formulas 24

High frequencies – Scheme for obtaining Time Constant of the Input Capacitance Cin:

LHAmp2.6

small signal amplifier task formulas 25

Logarithmic Amplitude Characteristic of the Amplifier:

LHAmp2.7

3 task


Common Emitter (CE) BJT Amplifier
LHAmp4.1

VCC = 10V
VBE = 0,7V
RC = 1kΩ
RLOAD = 5kΩ
Rg = 833Ω
I = IB = 30μA
β = 200

C1 = 95,5nF
C2 = 1,59μF
Cb’e = 31pF
Cb’c = 0,8pF
rbb’ << R g

IC = ?
gm = ?
VCE = ?
Rin = ?
Rout = ?
AV = ?
AVeff = ?

τ1 = ?
f1 = ?
τ2 = ?
f2 = ?
τup = ?
fup = ?

Small Signal Amplifier Formulas:

small signal amplifier formulas 31

small signal amplifier formulas 32

Medium frequencies:

small signal amplifier task formulas 31

LHAmp4.2

small signal amplifier task formulas 32small signal amplifier task formulas 33

Low frequencies:

LHAmp4.3

Scheme for obtaining Time Constant of the Coupling Capacitance C1:

LHAmp4.4

small signal amplifier task formulas 34

Scheme for obtaining Time Constant of the Coupling Capacitance C2:

LHAmp4.5

small signal amplifier task formulas 35

High frequencies – Scheme for obtaining Time Constant of the Blocking Capacitance CE:

LHAmp4.6

small signal amplifier task formulas 36small signal amplifier task formulas 37

4 task


Common Emitter (CE) BJT Amplifier
MAmp1.1

VCC = 14V
VBE = 0,7V
R1 = 10kΩ
R2 = 5kΩ
RC = 1kΩ
RE = 1kΩ
RLOAD = 1kΩ
Rg = 50Ω
β = 200
gce = 10 −4 S

VC1 = ?
VC2 = ?
VCE = ?
IC = ?
gm = ?
VCE = ?
Rin = ?
Rout = ?
AV = ?
AVeff = ?

Small Signal Amplifier Formulas:

small signal amplifier fromulas 41

small signal amplifier fromulas 42

small signal amplifier task formulas 41

small signal amplifier task formulas 42

Hybrid π model of the BJT Amplifier in CE configuration:

MAmp1.2

small signal amplifier task formulas 43small signal amplifier task formulas 44small signal amplifier task formulas 45

5 task


Common Emitter (CE) BJT Amplifier
MAmp2.1

VCC = 15V
VEE = -15V
VBE = 0,7V
R2 = 47kΩ
RC = 2,7kΩ
RE = 3,3kΩ
RLOAD = 2,2kΩ
Rg = 50Ω
IC = 4mA
β = 200
gce = 10−4 S


VC1 = ?
VC2 = ?
VCE = ?
gm = ?
VCE = ?
Rin = ?
Rout = ?
AV = ?
AVeff = ?

Small Signal Amplifier Formulas:

small signal amplifier fromulas 51

small signal amplifier fromulas 52

small signal amplifier task formulas 51

Hybrid π model of the BJT Amplifier in CE configuration:

MAmp2.2

small signal amplifier task formulas 52small signal amplifier task formulas 53small signal amplifier task formulas 54

6 task


Common Emitter (CE) BJT Amplifier
MAmp3.1

VCC = 20V
VBE = 0,7V
RC = 4kΩ
RB = 772kΩ
RLOAD = 4kΩ
Rg = 600Ω
rb’e = 1kΩ
gm = 160mS


β = ?
IC = ?
VCE = ?
Rin = ?
Rout = ?
AV = ?
AVeff = ?

Small Signal Amplifier Formulas:

small signal amplifier formulas 61small signal amplifier formulas 62

small signal amplifier task formulas 61

Hybrid π model of the BJT Amplifier in CE configuration:

MAmp3.2

small signal amplifier task formulas 62small signal amplifier task formulas 63

 

small signal amplifier task formulas 64

7 task


MAmp4.1

E = 18,7V
VA = 100V
VBE = 0,7V
VZ = 5,6V
|VT|= 4,7V (+)
RC = 5kΩ
RE = 2,45kΩ
RD = 1kΩ
R = 18kΩ
rds = 0
mA
K = 0,5 mA/V^2


IC = ?
VGS = ?
ID = ?
VDS = ?
gm = ?
Rin = ?
Rout = ?
AV = ?

Small Signal Amplifier Formulas:

small signal amplifier formulas 71

small signal amplifier formulas 72

small signal amplifier task formulas 71

Hybrid π model of the Amplifier:

MAmp4.2

small signal amplifier task formulas 72small signal amplifier task formulas 73

small signal amplifier task formulas 74

8 task


Common Emitter (CE) BJT Amplifier
MAmp6.1

VCC = 20V
VBB = 41V
VBE = 0,7V
RC1 = 1kΩ
RC2 = 1kΩ
RB = 2MΩ
RLOAD = 2,2kΩ
Rg = 50Ω
β = 200
gce = 10 -4 S


IC = ?
gm = ?
VCE = ?
Rin = ?
Rout = ?
AV = ?
AVeff = ?

Small Signal Amplifier Formulas:

small signal amplifier formulas 81

small signal amplifier formulas 82

small signal amplifier task formulas 81

Hybrid π model of the BJT Amplifier in CE configuration:

MAmp6.2

small signal amplifier task formulas 82

small signal amplifier task formulas 83

9 task


Common Emitter (CE) BJT Amplifier
MAmp7.1

VCC = 21V
VBE = 0,7V
RC = 1,2kΩ
R1 = 20kΩ
R2 = 10kΩ
RE1 = 160Ω
RE2 = 1,4kΩ
RLOAD = 4,7kΩ
Rg = 50Ω
β = 200

IC = ?
gm = ?
VCE = ?
Rin = ?
Rout = ?
AV = ?
AVeff = ?

Small Signal Amplifier Formulas:

small signal amplifier formulas 81

small signal amplifier formulas 82small signal amplifier task formulas 91Hybrid π model of the BJT Amplifier in CE configuration:

MAmp7.2

small signal amplifier task formulas 92small signal amplifier task formulas 93small signal amplifier task formulas 94

 

small signal amplifier task formulas 95

10 task


Common Base (CB) BJT Amplifier
MAmp8.1

VCC = 20V
VBE = 0,7V
RC = 1,2kΩ
R1 = 565kΩ
RE = 2kΩ
RLOAD = 2,2kΩ
Rg = 50Ω
β = 200

IC = ?
gm = ?
VCE = ?
Rin = ?
Rout = ?
AV = ?
AVeff = ?

Small Signal Amplifier Formulas:

small signal amplifier formulas 81

small signal amplifier formulas 82

small signal amplifier task formulas 101

Hybrid π model of the BJT Amplifier in CB configuration:

MAmp8.2

small signal amplifier task formulas

small signal amplifier task formulas 103small signal amplifier task formulas 104small signal amplifier task formulas 105

small signal amplifier task formulas 106

11 task


Common Source (CS) JFET Amplifier
MAmp10.1

EDD = 30V (+)
|VT|= 4V (-)
C3 = 3V
RD = 5kΩ
RS = 1kΩ
R2 = 100kΩ
Rg = 10kΩ
RLOAD = 20kΩ

ID = ?
VGS = ?
IDSS = ?
gm = ?
Rin = ?
Rout = ?
AV = ?
AVeff = ?

Small Signal Amplifier Formulas:

small signal amplifier formulas 81

small signal amplifier formulas 111

small signal amplifier task formulas 111

Hybrid π model of the JFET Amplifier in CS configuration:

MAmp10.2

small signal amplifier task formulas 112small signal amplifier task formulas 113