The four-resistor bias network of Figure12.22(a) on page 620 has VCC = 15 V, R1 = 100 kΩ, R2 = 47 kΩ, RC = 4.7 kΩ and RE=4.7 kΩ. Suppose that β ranges from 50 to 200, VBE = 0.7 V, and the resistors have tolerances of ±5 percent. Calculate the maximum and minimum values for IC. +VccRcR1RcVccVccR2RER2RE(b) Equivalent circuit showing separatevoltage sources for base andcollector circuits(a) Original circuitRcBlBRcVBEVccRgRBVccOEVBRE(c) Circuit using Thévenin equivalentin place of Vcc. R1, and R2(d) Equivalent to part (c) with active-regiontransistor modelFigure 12.22Four-resistor bias circuit.

In self-basing circuit, the equivalent voltage (VS) and the resistance at base terminal are given:…

Answered: +Vcc Rc R1 Rc Vcc Vcc R2 RE R2 RE (b)…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

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The four-resistor bias network of Figure12.22(a) on page 620 has VCC = 15 V, R1 = 100 kΩ, R2 = 47 kΩ, RC = 4.7 kΩ and RE=4.7 kΩ. Suppose that β ranges from 50 to 200, VBE = 0.7 V, and the resistors have tolerances of ±5 percent. Calculate the maximum and minimum values for IC.

+Vcc
Rc
R1
Rc
Vcc
Vcc
R2
RE
R2
RE
(b) Equivalent circuit showing separate
voltage sources for base and
collector circuits
(a) Original circuit
Rc
BlB
Rc
VBE
Vcc
Rg
RB
Vcc
OE
VB
RE
(c) Circuit using Thévenin equivalent
in place of Vcc. R1, and R2
(d) Equivalent to part (c) with active-region
transistor model
Figure 12.22
Four-resistor bias circuit.

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