Question
Download Solution PDFYou 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
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF- 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:
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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