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A certain diff. amplifier has a differential voltage gain of 2000 and a common mode gain of 0.2. The CMMR is decibels (dB) is:
- A10,000 dB
- B80 dB
- C200 dB
- D100 dB
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Given that, differential voltage gain (Ad) = 2000
Common mode gain (Ac) = 0.2
Common mode rejection ratio (CMRR) is given by,
$(CMRR = 20\log \left| {\frac{{{A_d}}}{{{A_c}}}} \right| = 20\log \left| {\frac{{2000}}{{0.2}}} \right| = 80\;dB)$
Common mode gain (Ac) = 0.2
Common mode rejection ratio (CMRR) is given by,
$(CMRR = 20\log \left| {\frac{{{A_d}}}{{{A_c}}}} \right| = 20\log \left| {\frac{{2000}}{{0.2}}} \right| = 80\;dB)$