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Question 8.4: A wideband operational amplifier has a slew rate of 15 V/μs.......

A wideband operational amplifier has a slew rate of 15 V/μs. If the amplifier is used in a circuit with a voltage gain of 20 and a perfect step input of 100 mV is applied to its input, determine the time taken for the output to change level.

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The output voltage change will be 20 × 100 = 2,000 mV (or 2 V). Re-arranging the formula for slew rate gives:

\Delta t  =  \frac{\Delta V_{OUT}}{\text{Slew rate}}  =  \frac{2  V}{15  V/\mu s}  =  0.133  \mu s

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