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Question

An op-amp with a slew rate of 1V/m sec has been used to build an amplifier of gain 10. If the input to the amplifier is sinusoidal voltage having peak amplitude of 1 V. The maximum allowable frequency of the input signal for undistorted output is

A
15.92 kHz
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B
18.74 kHz
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C
12.47 kHz
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D
13.62 kHz
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Solution

The correct option is A 15.92 kHz

Gain,AV=V0Vi=10

Slew rate=(dVdt)max=106V/sec

V0=10 Vi=10sinωt

dV0dt=10ωcosωt

Slew rate=(dVdt)max=10ω=10×2π×f

106=10×2π×f

f=15.92 kHz


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