Q4. The BJT in the common-base (CB) amplifier in Figure 4 has B=100, VE =0.7 V. in the active mode. The coupling capacitors are very large. The output resistance r, of the transistor can be neglected. (a) For I =1.2 mA, calculate the bias values of the collector voltage Vc and the emitter voltage VE (4 (b) Calculate the small-signal parameters ( g„, ", ) and draw the small-signal equivalent circuit of the amplifier. (c) Find the overall voltage gain G, defined as G (10 V.

Introductory Circuit Analysis (13th Edition)
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Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Q4. The BJT in the common-base (CB) amplifier in Figure 4 has
+12
Figure 4
s kn
B=100, VE = 0.7 V.
in the active mode. The coupling capacitors are very large. The
Ve
output resistance r, of the transistor can be neglected.
20 k2
(a) For I = 1.2 mA, calculate the bias values of the collector
voltage Vc and the emitter voltage VE (
0.5 k2
VE
(b) Calculate the small-signal parameters ( gm, ", ) and draw the
small-signal equivalent cireuit of the amplifier.
V sig
(10
(c) Find the overall voltage gain G, defined as G,
V.
sig
Transcribed Image Text:Q4. The BJT in the common-base (CB) amplifier in Figure 4 has +12 Figure 4 s kn B=100, VE = 0.7 V. in the active mode. The coupling capacitors are very large. The Ve output resistance r, of the transistor can be neglected. 20 k2 (a) For I = 1.2 mA, calculate the bias values of the collector voltage Vc and the emitter voltage VE ( 0.5 k2 VE (b) Calculate the small-signal parameters ( gm, ", ) and draw the small-signal equivalent cireuit of the amplifier. V sig (10 (c) Find the overall voltage gain G, defined as G, V. sig
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