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.
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.
Gowri said:
1 decade ago
Because in operational amplifiers output is propotional to the differece between two inputs. So there is a change in inputs means there will be a change in output according to that. So voltage gain won't be affected.
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.
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.
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?
Sougata Roy said:
1 decade ago
Whats the eqation for voltage gain. Does input voltage changes gain or it is not relatd explain your answer, why is it false ?
Muthuraja said:
1 decade ago
By changing the feedback resistance only we have to increase the output. Then only the gain increases. So it is false.
Aaaa said:
1 decade ago
Gain mean the ratio of input to the output.
Whenever change the i/p voltage the gain is change.
How it is false ?
Whenever change the i/p voltage the gain is change.
How it is false ?
Jayapriya said:
1 decade ago
Gain is inversely proportional to d input. So voltage gain doesnot change while changing the input of the op.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers