You are looking for an op-amp to be used for large signal amplification of high frequency signals. Name just one specification you would look for first of all

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SDSC ISRO Technical Assistant Electronics 8 April 2018 Official Paper
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  1. CMRR
  2. Unity gain crossover frequency
  3. Slew rate
  4. PSRR

Answer (Detailed Solution Below)

Option 3 : Slew rate
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Detailed Solution

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  • The output of an Op-Amp can only change by a certain amount in a given time. This limit is called the slew rate of the Op-Amp.
  • Op-Amp slew rate can limit the performance of a circuit if the slew rate requirement is exceeded.
  • This usually happens at high frequencies, i.e. when the rate of change of signals is large.
  • When the rate of change is large, it becomes difficult for the Op-Amp to track such fast variations.

 

This is best explained with the help of the given waveform:

 

           F1 S.B Pallavi 09.11.2019 D 1

 

The Slew-Rate of an Op-Amp for a give sinusoidal input is given by:

Slew Rate = 2π.f.V

Where,

f = The Highest signal frequency component (in Hz).

V = the maximum peak voltage of the signal.

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