Consider the common emitter (CE) amplifier shown in Figure Q1.a. Assume that i) both the coupling capacitors and the emitter capacitance are large enough to have zero impedance (i.e. short circuits), ii) the frequency of input signal is low enough to ignore transistor internal capacitances. Q1 а) 1) Draw the low-frequency small signal equivalent circuit considering the above assumptions. 2) Show that the maximum voltage gain is Ay(max) = -401çRc if rp « T, (R1//R2) » r7, 7 » Rs, R1 » Rc. o+V_ се R. C. R1 Rs C. RL Vo R, CE RE oV Figure Q1.a What are the advantages of multistage amplifiers over single transistor amplifiers? b) c) State and prove Miller’s theorem for a non-inverting amplifier.

Consider the common emitter (CE) amplifier shown in Figure Q1.a. Assume that i) both the coupling capacitors and the emitter capacitance are large enough to have zero impedance (i.e. short circuits), ii) the frequency of input signal is low enough to ignore transistor internal capacitances. Q1 а) 1) Draw the low-frequency small signal equivalent circuit considering the above assumptions. 2) Show that the maximum voltage gain is Ay(max) = -401çRc if rp « T, (R1//R2) » r7, 7 » Rs, R1 » Rc. o+V_ се R. C. R1 Rs C. RL Vo R, CE RE oV Figure Q1.a What are the advantages of multistage amplifiers over single transistor amplifiers? b) c) State and prove Miller’s theorem for a non-inverting amplifier.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Question

Consider the common emitter (CE) amplifier shown in Figure Q1.a.
Assume that i) both the coupling capacitors and the emitter capacitance are
large enough to have zero impedance (i.e. short circuits), ii) the frequency
of input signal is low enough to ignore transistor internal capacitances.
Q1
a)
1) Draw the low-frequency small signal equivalent circuit considering the
above assumptions.
2) Show that the maximum voltage gain is A,(max) = -401cRc if
rp « r7, (R1//R2) » r7, T7 » Rs, Rµ » Rc.
+V
R. C.
R1
Rs
RL
R,
RE
OV
Figure Q1.a
What are the advantages of multistage amplifiers over single transistor
amplifiers?
b)
c)
State and prove Miller’s theorem for a non-inverting amplifier.
Consider the long-tailed pair differential amplifier shown in Figure Q1.d.
Analyse the frequency performance of the amplifier.
d)
+Vc
RC
Ov
-VEE
CC
СВ
-
Figure Q1.d

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