Find the midband gain and the frequencies of the poles and zeros of the commonemitter amplifier as shown if the transistor has fT = 500 MHz, but Cμ = 1 pF. Vcc = 12 VRc4.3 kQ30 k2СтR0.1 μFRvoThévenin1 k2100 k22 μΕtransformationR1R1REC310 k21 k2RBR4.12 k21.3 k210 μF7.5 k2(a)(b)Figure 17.34 (a) Common-emitter amplifier. (b) High-frequency ac model for amplifier in (a).

Answered: Vcc = 12 V Rc 4.3 kQ 30 k2 Ст R 0.1 μFR…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

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Question

Find the midband gain and the frequencies of the poles and zeros of the commonemitter amplifier as shown if the transistor has f_T = 500 MHz, but C_μ = 1 pF.

Vcc = 12 V
Rc
4.3 kQ
30 k2
Ст
R
0.1 μFR
vo
Thévenin
1 k2
100 k2
2 μΕ
transformation
R1
R1
RE
C3
10 k2
1 k2
RB
R
4.12 k2
1.3 k2
10 μF
7.5 k2
(a)
(b)
Figure 17.34 (a) Common-emitter amplifier. (b) High-frequency ac model for amplifier in (a).

Expert Solution

Step 1

Given f_T = 500 MHz, C_µ= 1 pF, I_D = 0.2 mA, V_DS= 5 V

Calculating transconductance of the transistor

Calculating small signal resistance R₀

Step 2

Calculating R_Th

Calculating small signal input resistance R₀^’

Calculating load resistance

Step 3

Calculating input stage gain and terminal voltage gain in the below expression

Calculating mid band gain

Substituting value of input stage gain and voltage gain in the above expression

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