Problem 1: Determine the following: (d) Current gain (e) Power gain (f) Output resistance R₂ Wo 10 ΚΩ R₂ R₁ *100 ΚΩ 100 ΚΩ RE 2kQ2 Vcc=+20 V B= 200 VBEQ = 0.7 V RL IK

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Please answer last three subsections. First three shown in my work :
Problem 1:
Determine the following:
(d) Current gain
(e) Power gain
(f) Output resistance
R₂
Wo
10 ΚΩ
R₂
R₁
*100 ΚΩ
100 ΚΩ
RE
2kQ2
Vcc=+20 V
B= 200
VBEQ = 0.7 V
RL
K
Transcribed Image Text:Problem 1: Determine the following: (d) Current gain (e) Power gain (f) Output resistance R₂ Wo 10 ΚΩ R₂ R₁ *100 ΚΩ 100 ΚΩ RE 2kQ2 Vcc=+20 V B= 200 VBEQ = 0.7 V RL K
Vs
+
RS
ww
YOK-n
Step 1: open-ckt capacitors
IB= VH-VBE
gm
HE
remove AC ✓ source:
RTH = R₁11 R ₂ = 10011 100 = 50kn
VTH =
Vcc B₂
20 x 100 = IDV
R₁ + R₂
100 + 100
=
RI 100KA
R₂100kn
= 10-c.1
RTH + (1+B) RE 50+201×2
a) Small signal parameters:
re = UT
25mv
IE
4.221 MA
=
b) Voltage gain :
= 200
1.19×103
= 0.021 MA
I E = (1 + B) IB = 201 × 0.071 = 4.221 MA
IC IE-IB = 4.221 - 0.021
= 4.2mA
AV = = R₁
не
RE 2K-2 RL {IK_2
:
Av= - Rc 11 R₂
re
5.92
VCC
=0.168
= +20v
rπ = (1+ß) re = (1+200) 5.92 = 1.19kn
B
= -103
Ri
VTH
P₂{
Т
Since Rc=0,
= -168.91 v
B=200
VBEQ = 0.7
¥
2K
Vec 20v
RTH IB
HE
IE√ { 2K₁
Vec
5.92
c) Input Resistance :
Rin (Rill R₂)| VTT
Rin= (1001/100) 11.19 → Rin: 5011 1.19 → Rin= 50×1.19 = 1.16K1
50+1.19
✔
Transcribed Image Text:Vs + RS ww YOK-n Step 1: open-ckt capacitors IB= VH-VBE gm HE remove AC ✓ source: RTH = R₁11 R ₂ = 10011 100 = 50kn VTH = Vcc B₂ 20 x 100 = IDV R₁ + R₂ 100 + 100 = RI 100KA R₂100kn = 10-c.1 RTH + (1+B) RE 50+201×2 a) Small signal parameters: re = UT 25mv IE 4.221 MA = b) Voltage gain : = 200 1.19×103 = 0.021 MA I E = (1 + B) IB = 201 × 0.071 = 4.221 MA IC IE-IB = 4.221 - 0.021 = 4.2mA AV = = R₁ не RE 2K-2 RL {IK_2 : Av= - Rc 11 R₂ re 5.92 VCC =0.168 = +20v rπ = (1+ß) re = (1+200) 5.92 = 1.19kn B = -103 Ri VTH P₂{ Т Since Rc=0, = -168.91 v B=200 VBEQ = 0.7 ¥ 2K Vec 20v RTH IB HE IE√ { 2K₁ Vec 5.92 c) Input Resistance : Rin (Rill R₂)| VTT Rin= (1001/100) 11.19 → Rin: 5011 1.19 → Rin= 50×1.19 = 1.16K1 50+1.19 ✔
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