Electronics - Operational Amplifiers - Discussion
Discussion Forum : Operational Amplifiers - True or False (Q.No. 30)
30.
Changing the input voltage to an op-amp circuit will change its voltage gain.
Discussion:
21 comments Page 1 of 3.
Amjad akeel said:
1 decade ago
Gain=out/input it is the ratio and it remains constant e.g if we increase the input voltage ultimately output voltage will increase proportionally so ratio will remains same.
(1)
Bhavesh prajapati said:
1 decade ago
Here if we change input voltage then according to change in input voltage output voltage will also change, so voltage gain (o/p voltage/input voltage) , will remain constant.
Keshav sharma said:
7 years ago
There is two Input of differential amp so if we change the only anyone then how the output will not change anyone explained it for me?
Subbu said:
8 years ago
Gain = output/input.
So, the output changes the gain also changes.
So, the output changes the gain also changes.
Nitesh said:
9 years ago
How is it false?
Jeyapriya said:
1 decade ago
Gain=out/in so if the input is changed according to that the gain also changed. Then why it is false?
Jitendra said:
1 decade ago
Whats the difference among amplifier and dc amplifier and op-amp ? Please explain.
Anusha reddy said:
1 decade ago
In op-amp when the input is changed, output will also be changed as it is voltage controlled device. Thus, it doesn't effect the gain of op-amp.
Shruti said:
1 decade ago
In open loop configuration, op-amp has infinite gain. So i/p voltage will not affect the gain&in closed loop, gain for inverting amplifier is -Rf/R1 & gain for non-inverting amplifier is 1+ (Rf/R1). So in both configuration, voltage gain is independent of i/p voltage.
Rajat said:
1 decade ago
1+Rf/R1 and Rf/R1 are gain in op-amp for inverting and non inverting mode. So not dependent on input.
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