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8.21 Differential amplifiers are often used in conjunction with the Wheatstone bridge. Consider the bridge shown in Figure P8.21, where each resistor is a temperature-sensing element and the change in resistance is directly proportional to a change in temperature that is, AR = a (+AT), where the sign is determined by the positive or negative temperature coefficient of the resistive element. a. Find the Thévenin equivalent that the amplifier sees at point a and point b. Assume that |AR? « R. b. If JAR| = KAT, with K a numerical constant, find an expression for vout (AT), that is vaut as a function of change in temperature. 100 ka R- JAR Rot JAR| ww 10 V R+|A| Vout 100 ka R =1 ka

8.21 Differential amplifiers are often used in conjunction with the Wheatstone bridge. Consider the bridge shown in Figure P8.21, where each resistor is a temperature-sensing element and the change in resistance is directly proportional to a change in temperature that is, AR = a (+AT), where the sign is determined by the positive or negative temperature coefficient of the resistive element. a. Find the Thévenin equivalent that the amplifier sees at point a and point b. Assume that |AR? « R. b. If JAR| = KAT, with K a numerical constant, find an expression for vout (AT), that is vaut as a function of change in temperature. 100 ka R- JAR Rot JAR| ww 10 V R+|A| Vout 100 ka R =1 ka

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
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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8.21 Differential amplifiers are often used in conjunction with the Wheatstone bridge. Consider the bridge shown in Figure P8.21, where each resistor is a temperature-sensing element and the change in resistance is directly proportional to a change in temperature that is, AR = a (+AT), where the sign is determined by the positive or negative temperature coefficient of the resistive element. a. Find the Thévenin equivalent that the amplifier sees at point a and point b. Assume that |AR? « R. b. If JAR| = KAT, with K a numerical constant, find an expression for vout (AT), that is vaut as a function of change in temperature. 100 ka R- JAR Rot JAR| ww 10 V R+|A| Vout 100 ka R =1 ka
Transcribed Image Text:8.21 Differential amplifiers are often used in conjunction with the Wheatstone bridge. Consider the bridge shown in Figure P8.21, where each resistor is a temperature-sensing element and the change in resistance is directly proportional to a change in temperature that is, AR = a (+AT), where the sign is determined by the positive or negative temperature coefficient of the resistive element. a. Find the Thévenin equivalent that the amplifier sees at point a and point b. Assume that |AR? « R. b. If JAR| = KAT, with K a numerical constant, find an expression for vout (AT), that is vaut as a function of change in temperature. 100 ka R- JAR Rot JAR| ww 10 V R+|A| Vout 100 ka R =1 ka
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