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.
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 ?
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 ?
Ssss said:
1 decade ago
GAIN=OUTPUT/INPUT,
If any changes made in either output or input definetly gain change, how it can be false.
If any changes made in either output or input definetly gain change, how it can be false.
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.
Jayapriya said:
1 decade ago
Gain is inversely proportional to d input. So voltage gain doesnot change while changing the input of the op.
Vandana said:
1 decade ago
What's the meaning of 'd' here. Please explain jayapriya.
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.
Muthuraja said:
1 decade ago
The formula for Vout = -Rf/R1. So in this we don't have input voltage.
CHITARANJAN said:
1 decade ago
Voltage gain=Vout/Vin=-Rf/R1 ,So no matter how the input voltage change. that's why option is FALSE.
NAGARAJU SREERAMA said:
1 decade ago
Op-amp gain is infinite, so whatever the input, output is in saturation, and input doesn't effects the gain.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers