25. Each RC circuit in an op-amp (a) causes the gain to roll off at -6 dB/octave (b) causes the gain to roll off at -20 dB/decade (c) reduces the midrange gain by 3 dB (d) answers (a) and (b) 26. If a certain op-amp has a midrange open-loop gain of 200,000 and a unity-gain frequency of 5 MHz, the gain-bandwidth product is (a) 200,000 Hz (b) 5,000,000 Hz (c) 1 x 1012 Hz 3 27. The bandwidth of an ac amplifier having a lower critical frequency of 1 kHz and an upper critical frequency of 10 kHz is (a) 1 kHz (d) not determinable from the information (b) 9 kHz (c) 10 kHz (d) 11 kHz

25. Each RC circuit in an op-amp (a) causes the gain to roll off at -6 dB/octave (b) causes the gain to roll off at -20 dB/decade (c) reduces the midrange gain by 3 dB (d) answers (a) and (b) 26. If a certain op-amp has a midrange open-loop gain of 200,000 and a unity-gain frequency of 5 MHz, the gain-bandwidth product is (a) 200,000 Hz (b) 5,000,000 Hz (c) 1 x 1012 Hz 3 27. The bandwidth of an ac amplifier having a lower critical frequency of 1 kHz and an upper critical frequency of 10 kHz is (a) 1 kHz (d) not determinable from the information (b) 9 kHz (c) 10 kHz (d) 11 kHz

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

Operational Amplifier

An operational amplifier also called op amp is an integrated circuit or analog circuit that takes input as a differential voltage and produces output as a single-ended voltage. It is an IC that can amplify weak electric signals.An op amp has one output pin and two input pins. The basic role of an opamp is to amplify the voltage difference between the two input voltages. It is also used in filtering or to perform mathematical operations or in signal conditioning.

Question

25. Each RC circuit in an op-amp
(a) causes the gain to roll off at -6 dB/octave
(b) causes the gain to roll off at -20 dB/decade
(c) reduces the midrange gain by 3 dB
(d) answers (a) and (b)
26. If a certain op-amp has a midrange open-loop gain of 200,000 and a unity-gain frequency of
5 MHz, the gain-bandwidth product is
(a) 200,000 Hz
(b) 5,000,000 Hz
(c) 1 X 1012 Hz
(d) not determinable from the information
2-8 27. The bandwidth of an ac amplifier having a lower critical frequency of 1 kHz and an upper
critical frequency of 10 kHz is
(a) 1 kHz
(b) 9 kHz
(c) 10 kHz
(d) 11 kHz
28. The bandwidth of a de amplifier having an upper critical frequency of 100 kHz is
(a) 100 kHz
(b) unknown
(c) infinity
(d) 0 kHz
29. When negative feedback is used, the gain-bandwidth product of an op-amp
(a) increases
(b) decreases
(c) stays the same
(d) fluctuates
30. If a certain op-amp has a closed-loop gain of 20 and an upper critical frequency of 10 MHz, the
gain-bandwidth product is
(a) 200 MHz
(b) 10 MHz
(c) the unity-gain frequency
(d) answers (a) and (c)

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