Questions & Answers of Frequency response of amplifiers

Weightage of Frequency response of amplifiers

Total 2 Questions have been asked from Frequency response of amplifiers topic of Analog Circuits subject in previous GATE papers. Average marks 1.50.

Which one of the following statements is correct about an ac-coupled common-emitter amplifier operating in the mid-band region?
 

The ac schematic of an NMOS common-source stage is shown in the figure below, where part of the biasing circuits has been omitted for simplicity. For the n -channel MOSFET M, the transconductance gm = 1 mA/V, and body effect and channel length modulation effect are to be neglected. The lower cutoff frequency in Hz of the circuit is approximately at