GATE ECE
Analog Circuits
Feedback Amplifier
Previous Years Questions

## Marks 1

The desirable characteristics of a transconductance amplifier are
The feedback topology in the amplifier circuit (the base bias circuit is not shown for simplicity) in the figure is ...
A good current buffer has
In the ac equivalent circuit shown in the figure, if i$${_F}$$ is very large, the type of feedback is ...
In a voltage-voltage feedback as shown below, which one of the following statements is TRUE, if the gain k is increased? ...
In a shunt-shunt negative feedback Amplifier, as compared to the basic Amplifier,
To obtain very high input and output impedances in a feedback Amplifier, the mostly used is
Negative feedback in Amplifiers.

## Marks 2

Voltage series feedback (also called series-shunt feedback) results in
An amplifier without feedback has a voltage gain of 50, input Resistance of 1 k$$\Omega$$ and output Resistance of 2.5 k$$\Omega$$ . The input Resi...
In a negative feedback amplifier using voltage - Series (i.e., voltage - sampling, series mixing) feedback
The most commonly used Amplifier in sample and hold circuit is
An amplifier has an open loop gain of 100, an input impedance of 1 k$$_\Omega$$, and an output impedance of 100 $$_\Omega$$ . A feedback network wit...
Negative feedback in an amplifier
Negative feedback in 1. Voltage series configuration 2.Current shunt configuration (a) increases input impedance (b) decreases input impedance (...
Two non-inverting amplifiers, one having a unity gain and other having a gain of twenty, are made using identical operational gain amplifier, the amp...
The feedback amplifier shown in Fig.has: ...
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