- GATE 2018
12. In the differential amplifier shown in the figure, the magnitudes of the common-mode and differential-mode gains are Acm and Ad, respectively. If the resistance RE is increased, then
(A) Acm increases
(B) common-mode rejection ratio increases
(C) Ad increases
(D) common-mode rejection ratio decreases
Answer-(B) common-mode rejection ratio increases
Discuss the solution.