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Feed back of inverting OP Amp.

S

swapan

Member
In some inverting OP Amp. circuits a capacitor is used in parallel to the feedback resistor. As a handy case, in a circuit, the R1 is 10K, R2 is 330K and a capacitor of 2.2Mfd/63Volt (Electrolytic) is used in parallel to R2. Please let me know the impact of the capacitor.


Swapan
 
hi,
If the input to the OPA is say DC, then the Cap will integrate the input with respect to time.
If the input is an AC signal, consider what will happen to the OPA gain when the XC capacitance reactance of the cap is equal to 330k.???
 
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