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GATE EC : Analog Circuits Champion Quiz 2

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Question 1

The effect of current shunt feedback in an amplifier is to

Question 2

In a transconductance amplifier, it is desirable to have

Question 3

The Cascode amplifier is a multistage configuration of

Question 4

The circuit below implements a filter between the input current ij and the output voltage v₀. Assume that the opamp is ideal. The filter implemented is a

Question 5

An n-channel depletion MOSFET has following two points on its I_D – V_GS curve:
(i) V_GS = 0 at I_D = 12mA and
(ii) V_GS = –6 Volts at I_D = 0
Which of the following Q-points will give the highest trans-conductance gain for small signals?

Question 6

The common emitter amplifier shown in the following figure isbiased using a 1 mA ideal current source. Theapproximate base current value is:

Question 7

A bipolar transistor is operating in the active region with a collector current of 1mA. Assuming that the β of the transistor is 100 and the thermal voltage (V_T) is 25 mV, the transconductance (g_m) and the input resistance (r_π) of the transistor in the common emitter configuration, are

Question 8

In the ac equivalent circuit shown, the two BJTs are biased in active region and have identical parameters with β >> 1. The open circuit small signal voltage gain is approximately___________

Question 9

The DC current gain (β) of a BJT is 50. Assuming that the emitter injection efficiency is 0.995, the base transport factor is:

Question 10

For the BJT circuit shown, assume that the β of the transistor is very large and V_BE = 0.7 V. The mode of operation of the BJT is:

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ESE & GATE EC Analog Circuits

Mar 13ESE & GATE EC