GATE 1987 ECE Analog Circuits (Analog Electronics) - Video Solutions

1. In the figure, if the CMRR of the operational amplifier is 60 dB, then the magnitude of the output voltage is

Answer: 100 mV

Solution : https://www.youtube.com/watch?v=ESpNuIMnYZo


2. The configuration of cascode amplifier is
a. CE – CE
b. CE – CB
c. CC – CB
d. CC – CC

Answer: B

Solution : https://www.youtube.com/watch?v=rjgvNommuXU


3. In case of class A amplifiers, the ratio of efficiency of transformer coupled amplifier to efficiency of a transformer less amplifier is
a. 2.0
b. 1.36
c. 1.0
d. 0.5

Answer: A

Solution : https://www.youtube.com/watch?v=A-lOzfa17B8