Answered: Rc Vcc RB UCE UBE Vin(t) VBB Figure…

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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Consider the circuit of Figure 12.7 on page 605. Assume that VCC=20 V, VBB=0.3 V, RB=40 kΩ, and RC=2 kΩ. The input signal is a 0.2-V-peak 1-kHz sinusoid given by vin(t)=0.2 sin(2000πt). The common-emitter characteristics for the transistor are shown in Figure P12.18. Determine the maximum, minimum, and Q-point values for vCE. What is the approximate voltage gain for this circuit? Why is the gain so small in magnitude?

Rc
Vcc
RB
UCE
UBE
Vin(t)
VBB
Figure 12.7
A simple common-emitter amplifier that can be analyzed by load-line techniques.

ig (µA)
25
20
15
10
5
- U'BE (V)
1.0
0.2
0.4
0.6
0.8
(a) Input
Figure P12.18
iç (mA)
12
i25 μΑ
10
20 μΑ
8.
15 μΑ
10 μΑ
5μΑ
UCE (V)
20
12
16
(b) Output
6.
4.
2.

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