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Q#1 Amplifiers GATE EE 1997 MSQ +2 marks -0 marks

For the differential amplifier circuit shown in Figure, determine the differential gain, the common-mode gain and the common-mode rejection ratio.

The magnitude of the single-ended differential-mode gain () is approximately 95.24.

The single-ended common-mode gain () has an approximate value of .

The Common-Mode Rejection Ratio (CMRR) of the circuit is approximately 39.75 dB.

If the source resistance  is reduced to 0 , the magnitude of the differential-mode gain will increase to exactly 100.

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