Q.4: In the BJT amplifier circuit of figure 4, the DC bias current Ic is 2.3 mA. The transistor has a =100 and Early voltage V₁ =100 Volts. 100 ΚΩ V₂ +10 V 23 ΚΩ V Figure 4 (a) Draw the small-signal ac equivalent model for the amplifier and show the values of the ac parameters gm, r, ro. (b) Find the voltage gain vo/vs. (c) Up to what value of vs the amplifier will operate properly (i.e., the BJT shall remain in the active mode)?

Q.4: In the BJT amplifier circuit of figure 4, the DC bias current Ic is 2.3 mA. The transistor has a =100 and Early voltage V₁ =100 Volts. 100 ΚΩ V₂ +10 V 23 ΚΩ V Figure 4 (a) Draw the small-signal ac equivalent model for the amplifier and show the values of the ac parameters gm, r, ro. (b) Find the voltage gain vo/vs. (c) Up to what value of vs the amplifier will operate properly (i.e., the BJT shall remain in the active mode)?

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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Concept explainers

Differential amplifier

There are two amplifying stages with common degeneration in a differential amplifier.

Question

Q.4: In the BJT amplifier circuit of figure 4, the DC bias current Ic is 2.3 mA. The transistor has a =100
and Early voltage V₁ =100 Volts.
100 ΚΩ
+10 V
3 ΚΩ
Va
Figure 4
(a) Draw the small-signal ac equivalent model for the amplifier and show the values of the ac
parameters gm, rm, ro.
(b) Find the voltage gain vo/vs.
(c) Up to what value of vs the amplifier will operate properly (i.e., the BJT shall remain in the active
mode)?

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Step 2: Small signal equivalent circuit and determining its parameters:

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Step 3: Determining voltage gain

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Step 4: Determining range of Vs to make BJT in active region:

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