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GATE EC 2020: Analog Quiz 7 (App update required to attempt this test)

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Question 1

A 50 W power amplifier has a rated output of 30 Vrms and a voltage gain of 40 dB. It is connected to a 40 W loudspeaker having an internal resistance of 10Ω. Find the maximum input voltage (in V) that can be given to the power amplifier so that neither the power amplifier nor the loudspeaker is overloaded.

Question 2

For the transistor biasing shown below, the value of the stability factor S is ________. Given β of Transistor is 50.

Question 3

Consider the N – MOS transistor baised as shown in the figure given below. The MOSFET parameters are KN = 1mA/V2 VT = 1.5V and λ = o. The transistor is used as an amplifier, if input signal is Vin = 5 sin(wt) mV, then output voltage Vo will be

Question 4

A sinusoidal oscillator is built using an amplifier of real gain A, infinite input impedance and the feedback(β) network as shown in the figure.
If Z=jX then Z0 is equal to

Question 5

For the given circuit, if the resistance R2 is doubled, what is its effect on the current IC

Question 6

An amplifier exhibits distortion in the form of voltage fluctuations of ~ 10%. These fluctuations are to be restricted to ~ 1% by incorporating negative feedback in the amplifier circuit. If ultimate gain is desired to be 120, what should be the open loop gain of the amplifier?

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Sep 7ESE & GATE EC