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2.12 (a) Show that if the op amp in the circuit of Fig. 2.12 has a finite open-loop gain A, then the closed-loop gain is given by Eq. (2.11). (b) For R, = 1 k2 and R, = 9 k2 find the percentage HW deviation e of the closed-loop gain from the ideal value of (1+R,/R) for the cases A = 10', 10*, and 10°. For v,=1 V, find in each case the voltage between the two input terminals of the op amp. Ans. e=-1%, –0.1%, –0.01%; v, – v, =9.9 mV, 1 mV, 0.1 mV

2.12 (a) Show that if the op amp in the circuit of Fig. 2.12 has a finite open-loop gain A, then the closed-loop gain is given by Eq. (2.11). (b) For R, = 1 k2 and R, = 9 k2 find the percentage HW deviation e of the closed-loop gain from the ideal value of (1+R,/R) for the cases A = 10', 10*, and 10°. For v,=1 V, find in each case the voltage between the two input terminals of the op amp. Ans. e=-1%, –0.1%, –0.01%; v, – v, =9.9 mV, 1 mV, 0.1 mV

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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2.12 (a) Show that if the op amp in the circuit of Fig. 2.12 has a finite open-loop gain A, then the closed-loop gain is given by Eq. (2.11). (b) For R, = 1 k2 and R, = 9 k2 find the percentage HW deviation e of the closed-loop gain from the ideal value of (1+R,/R) for the cases A = 10', 10*, and 10°. For v,=1 V, find in each case the voltage between the two input terminals of the op amp. Ans. e=-1%, –0.1%, –0.01%; v, – v, =9.9 mV, 1 mV, 0.1 mV
Transcribed Image Text:2.12 (a) Show that if the op amp in the circuit of Fig. 2.12 has a finite open-loop gain A, then the closed-loop gain is given by Eq. (2.11). (b) For R, = 1 k2 and R, = 9 k2 find the percentage HW deviation e of the closed-loop gain from the ideal value of (1+R,/R) for the cases A = 10', 10*, and 10°. For v,=1 V, find in each case the voltage between the two input terminals of the op amp. Ans. e=-1%, –0.1%, –0.01%; v, – v, =9.9 mV, 1 mV, 0.1 mV
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