Electronics - Operational Amplifiers - Discussion
Discussion Forum : Operational Amplifiers - General Questions (Q.No. 7)
7.
A noninverting closed-loop op-amp circuit generally has a gain factor:
Discussion:
6 comments Page 1 of 1.
Karan Arora said:
10 years ago
For Positive Feedback circuit, Gain is = A/(1-A. B).
Hence denominator will be less than 1 always and so gain will be more than 1 always whereas for negative feedback circuit, gain is = A/(1+A.B).
Hence denominator will be more than 1 always and so gain will be less than 1 always.
All the Best.
Hence denominator will be less than 1 always and so gain will be more than 1 always whereas for negative feedback circuit, gain is = A/(1+A.B).
Hence denominator will be more than 1 always and so gain will be less than 1 always.
All the Best.
(1)
Swapna said:
1 decade ago
Gain Av= 1+ (Rf/R).
Even if feedback resistance is less i.e. Rf<R. The gain will be always greater than 1.
Even if feedback resistance is less i.e. Rf<R. The gain will be always greater than 1.
Muthuraja said:
1 decade ago
The formula is 1+Rf/R1 . We know that Rf > R1 . So it is always greater than one
(1)
Praka said:
1 decade ago
Negative feed back always decrease the gain of system.
(1)
Pushp raj said:
1 decade ago
Positive feedback always has gain more than unity.
(1)
VATSALA SHARMA said:
1 decade ago
The gain of non inverting amplifier exceeds the gain of inverting amplifier by unity.
(1)
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