A certain inverting amplifier has a closed-loop voltage gain of 25. The OP-amp has an open-loop voltage gain of 100,000. If an OP-amp with an open-loop voltage gain of 200,000 is substituted in the arrangement, the closed-loop gain
A. doubles
B. drops to 12.5
C. remains at 25
D. increases slightly
Answer: Option C
This Question Belongs to Electrical Engineering >> OP Amp
The closed loop gain of the op- amp is independent of open loop gain. The closed loop gain is decided by the value of passive elements like resistors ( Rf and Rin).
QII The common-mode rejection ratio (CMRR) of an op-amp is: