Electronics - Operational Amplifiers - Discussion
Discussion Forum : Operational Amplifiers - General Questions (Q.No. 41)
41.
The common-mode voltage gain is
Discussion:
3 comments Page 1 of 1.
Piyashi said:
9 years ago
As in CMRR both input and output are connected to the same input then ideally Vocm=0.
But as in practical, this is not possible so we get small value.
But as in practical, this is not possible so we get small value.
RAMKAMAL said:
9 years ago
CMRR = mod of Ad/Ac.
Ad = CMRR * Ac But Ac = Ad/CMRR.
Ad = CMRR * Ac But Ac = Ad/CMRR.
Ksk said:
1 decade ago
Because, CMRR is the ratio of the differential mode gain to the common mode gain, therefore in order to improve the CMRR, common mode voltage gain should be smaller than the differential voltage gain.
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