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GATE 2019: Analog Circuits Quiz 3

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Question 1

Oxide thickness of MOS capacitor is 55nm. Then what will be the capacitance?
(Relative permittivity of oxide,  ∈= 3.9)

Question 2

Find the lower cut off frequency response effected due to the input coupling capacitor in the common source JFET Amp circuit?

Question 3

The FET in the circuit has rds = 50KΩ and gm = 5 mS. Determine the value of voltage gain. .

Question 4

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

Question 5

Find voltage gain Vin/Vo (Given β=100)

Question 6

The output resistance Ro of the circuit

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Jan 25ESE & GATE EC