c) If in figure 3.1 a npn BJT transistor with a current gain ß = 75 is used and RB1 = 100 kohm, RB2 = (10 x 1.XY) kohm, Rc = 7.5 kohm, RE = (1.XY) kohm and Vcc= 24 V determine the Q-point (values of VBE, IB, VCE, IC). d) Now sketch the ac circuit model of the amplifier shown in figure 3.1. Using the Q-point determined in Q3 (c) calculate the value of the ac open circuit voltage gain Av and the ac short circuit current gain Ai. (Assume that Vth = 26 mV). What role do the capacitors Cin and Cout play in the operation/use of this ac amplifier?
c) If in figure 3.1 a npn BJT transistor with a current gain ß = 75 is used and RB1 = 100 kohm, RB2 = (10 x 1.XY) kohm, Rc = 7.5 kohm, RE = (1.XY) kohm and Vcc= 24 V determine the Q-point (values of VBE, IB, VCE, IC). d) Now sketch the ac circuit model of the amplifier shown in figure 3.1. Using the Q-point determined in Q3 (c) calculate the value of the ac open circuit voltage gain Av and the ac short circuit current gain Ai. (Assume that Vth = 26 mV). What role do the capacitors Cin and Cout play in the operation/use of this ac amplifier?
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Question
XY=54
Transcribed Image Text:Vin
RB1
Cin
HH
lin
RB2
2⁰
VB
RE
+ Vcc
HH
Vc Cout
VE
Vout
Ce
¡out
Figure 3.1
c) If in figure 3.1 a npn BJT transistor with a current gain ß = 75 is used and
RB1 = 100 kohm, RB2 = (10 x 1.XY) kohm, Rc = 7.5 kohm, RE = (1.XY) kohm
and Vcc = 24 V determine the Q-point (values of VBE, IB, VCE, IC).
d)
Now sketch the ac circuit model of the amplifier shown in figure 3.1.
Using the Q-point determined in Q3 (c) calculate the value of the ac open
circuit voltage gain Av and the ac short circuit current gain Ai. (Assume that
Vth = 26 mV).
What role do the capacitors Cin and Cout play in the operation/use of this ac
amplifier?
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