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 2 of 3.
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.
Mani said:
1 decade ago
Gain = output/input.
So i/p is inversely proportional to gain. So gain is also change.
So i/p is inversely proportional to gain. So gain is also change.
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.
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.
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.
Jitendra said:
1 decade ago
Whats the difference among amplifier and dc amplifier and op-amp ? Please explain.
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)
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?
Nitesh said:
9 years ago
How is it false?
Subbu said:
8 years ago
Gain = output/input.
So, the output changes the gain also changes.
So, the output changes the gain also changes.
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