1
GATE ECE 1999
MCQ (Single Correct Answer)
+2
-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
A
$$10\,\Omega \,and\,1\,\Omega $$
B
$$10\,\Omega \,and\,10\,\Omega $$
C
$$100 k\,\Omega \,and\,1\,\Omega $$
D
$$100 k\,\Omega \,and\,1 \,\Omega $$
2
GATE ECE 1999
MCQ (Single Correct Answer)
+2
-0.6
Negative feedback in an amplifier
A
Reduces gain
B
Increase frequency and phase distortions
C
Reduces bandth
D
Increase Noise
3
GATE ECE 1997
Subjective
+2
-0
Negative feedback in

1. Voltage series configuration
2.Current shunt configuration

(a) increases input impedance
(b) decreases input impedance
(c) increases closed loop gain
(d) leads to ascillation.

4
GATE ECE 1991
MCQ (More than One Correct Answer)
+2
-0.6
Two non-inverting amplifiers, one having a unity gain and other having a gain of twenty, are made using identical operational gain amplifier, the amplifier with gain twenty has
A
less negative feedback
B
greater input impedance
C
less bandwidth
D
none of the above
GATE ECE Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
CBSE
Class 12