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Consider the common emitter BJT amplifier shown in Figure 3.1. The input voltage v1 comprises the sum of a DC bias voltage V₁ = 0.7V and a sinusoid of the form v₁ = A sin wt, where A = 0.001V. For the values shown, you may assume that A is very small compared to V₁. You may further assume that the BJT always operates in its active region. Figure 3.2 shows a small signal model for the BJT operating in its active region. Let the output voltage vo comprise a DC bias term Vo and a small-signal response term Vo. BiB VBE (a) BJT iE E 100 ΚΩ 0.001 V sin(cor) w VCE 0.7 V Figure 3.1 Figure 3.2 15 V 50 ΚΩ Vo B = 100 Bib Bib E (b) BJT small signal model a) Determine the output operating point voltage Vo for the input bias of V₁ = 0.7V. b) Draw the small signal equivalent circuit for the amplifier. c) Determine the small signal gain of the amplifier. d) What is the value of vo, the small signal component of the output, given the small signal input shown in Figure 3.1.

Consider the common emitter BJT amplifier shown in Figure 3.1. The input voltage v1 comprises the sum of a DC bias voltage V₁ = 0.7V and a sinusoid of the form v₁ = A sin wt, where A = 0.001V. For the values shown, you may assume that A is very small compared to V₁. You may further assume that the BJT always operates in its active region. Figure 3.2 shows a small signal model for the BJT operating in its active region. Let the output voltage vo comprise a DC bias term Vo and a small-signal response term Vo. BiB VBE (a) BJT iE E 100 ΚΩ 0.001 V sin(cor) w VCE 0.7 V Figure 3.1 Figure 3.2 15 V 50 ΚΩ Vo B = 100 Bib Bib E (b) BJT small signal model a) Determine the output operating point voltage Vo for the input bias of V₁ = 0.7V. b) Draw the small signal equivalent circuit for the amplifier. c) Determine the small signal gain of the amplifier. d) What is the value of vo, the small signal component of the output, given the small signal input shown in Figure 3.1.

Introductory Circuit Analysis (13th Edition)
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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Consider the common emitter BJT amplifier shown in Figure 3.1. The input voltage v1 comprises the sum of a DC bias voltage V₁ = 0.7V and a sinusoid of the form v₁ = A sin wt, where A = 0.001V. For the values shown, you may assume that A is very small compared to V₁. You may further assume that the BJT always operates in its active region. Figure 3.2 shows a small signal model for the BJT operating in its active region. Let the output voltage vo comprise a DC bias term Vo and a small-signal response term Vo. B iB VBE (a) BJT ¹E E 0.001 V sin(cor) VCE 0.7 V Figure 3.1 www Figure 3.2 15 V 100 ΚΩ wwwB 100 50 ΚΩ vo B ib Bib E (b) BJT small signal model a) Determine the output operating point voltage Vo for the input bias of V₁ = 0.7V. b) Draw the small signal equivalent circuit for the amplifier. c) Determine the small signal gain of the amplifier. d) What is the value of vo, the small signal component of the output, given the small signal input shown in Figure 3.1.
Transcribed Image Text:Consider the common emitter BJT amplifier shown in Figure 3.1. The input voltage v1 comprises the sum of a DC bias voltage V₁ = 0.7V and a sinusoid of the form v₁ = A sin wt, where A = 0.001V. For the values shown, you may assume that A is very small compared to V₁. You may further assume that the BJT always operates in its active region. Figure 3.2 shows a small signal model for the BJT operating in its active region. Let the output voltage vo comprise a DC bias term Vo and a small-signal response term Vo. B iB VBE (a) BJT ¹E E 0.001 V sin(cor) VCE 0.7 V Figure 3.1 www Figure 3.2 15 V 100 ΚΩ wwwB 100 50 ΚΩ vo B ib Bib E (b) BJT small signal model a) Determine the output operating point voltage Vo for the input bias of V₁ = 0.7V. b) Draw the small signal equivalent circuit for the amplifier. c) Determine the small signal gain of the amplifier. d) What is the value of vo, the small signal component of the output, given the small signal input shown in Figure 3.1.
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