opam, voltage gain of an open loop circuit of an op-amp.?

LvW

Joined Jun 13, 2013
1,586
Why is the voltage gain of an open loop circuit of an op-amp dependent upon the frequency of the signal?
Also the voltage gain of an opamp with feedback is frequency-dependent.
More than that - the gain for each amplifier (integrated or discrete) will depend on the signal frequency.
This cannot be avoided because each circuit (even a simple resistive voltage divider) contains hidden capacitive effects which cause a amplitude reduction for rising frequencies (can be observed sometimes in the high MHz region only)
 
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