GATE ECE 2003 | Feedback Amplifier Question 7 | Analog Circuits

GATE ECE 2003

MCQ (Single Correct Answer)

-0.6

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 Resistance of the current-shunt negative feedback factor of 0.2 is

1/1 k$$\Omega $$

1/5 k$$\Omega $$

5 k$$\Omega $$

11 k$$\Omega $$

GATE ECE 2002

MCQ (Single Correct Answer)

-0.6

In a negative feedback amplifier using voltage - Series (i.e., voltage - sampling, series mixing) feedback

$${R_i}$$ decreases and $${R_0}$$ decreases
($${R_i}$$ and $${R_0}$$ denote the input and outout resistances respectively)

$${R_i}$$ decreases and $${R_0}$$ increases
($${R_i}$$ and $${R_0}$$ denote the input and outout resistances respectively)

$${R_i}$$ increases and $${R_0}$$ decreases
($${R_i}$$ and $${R_0}$$ denote the input and outout resistances respectively)

$${R_i}$$ increases and $${R_0}$$ increases
($${R_i}$$ and $${R_0}$$ denote the input and outout resistances respectively)

GATE ECE 2000

MCQ (Single Correct Answer)

-0.6

The most commonly used Amplifier in sample and hold circuit is

A unity gain inverting Amplifier

A unity gain non-inverting inverting Amplifier

An inverting Amplifier with a gain of 10.

An inverting Amplifier with a gain of 100.

GATE ECE 1999

MCQ (Single Correct Answer)

-0.6

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 with a feedback factor of 0.99 is connected to the amplifier an a voltage series feedback mode. The new input and output impedance respectively are

$$10\,\Omega \,and\,1\,\Omega $$

$$10\,\Omega \,and\,10\,\Omega $$

$$100 k\,\Omega \,and\,1\,\Omega $$

$$100 k\,\Omega \,and\,1 \,\Omega $$

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