A differential amplifier has a differential gain of 20,000. CMMR=80dB. The common mode gain is given by_______________?
Correct answer: A. 2
- A. 2
- B. 1
- C. 1/2
- D. 0
Explanation
CMRR = Ad/Ac, and 80 dB corresponds to a ratio of 10^(80/20) = 10,000. Thus Ac = 20,000/10,000 = 2.
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