para given op-amp, CMRR = 105 and differential gain = 105. What is the common mode gain of the op-amp?
Question
para given op-amp, CMRR = 105 and differential gain = 105. What is the common mode gain of the op-amp?
Solution
The Common Mode Rejection Ratio (CMRR) of an operational amplifier (op-amp) is defined as the ratio of the differential gain (Ad) to the common mode gain (Ac). It is usually expressed in decibels (dB).
The formula for CMRR is:
CMRR = Ad / Ac
Given that CMRR = 105 and Ad = 105, we can rearrange the formula to solve for Ac:
Ac = Ad / CMRR
Substituting the given values:
Ac = 105 / 105 = 1
So, the common mode gain of the op-amp is 1.
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