1
GATE ECE 2004
+2
-0.6
Voltage series feedback (also called series-shunt feedback) results in
A
increase in both input and output impedances.
B
decrease in both input and output impedances.
C
increase in both input impedances and decrease in output impedances.
D
decrease in input impedances and increase in output impedance.
2
GATE ECE 2003
+2
-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
A
1/1 k$$\Omega$$
B
1/5 k$$\Omega$$
C
5 k$$\Omega$$
D
11 k$$\Omega$$
3
GATE ECE 2002
+2
-0.6
In a negative feedback amplifier using voltage - Series (i.e., voltage - sampling, series mixing) feedback
A
$${R_i}$$ decreases and $${R_0}$$ decreases
($${R_i}$$ and $${R_0}$$ denote the input and outout resistances respectively)
B
$${R_i}$$ decreases and $${R_0}$$ increases
($${R_i}$$ and $${R_0}$$ denote the input and outout resistances respectively)
C
$${R_i}$$ increases and $${R_0}$$ decreases
($${R_i}$$ and $${R_0}$$ denote the input and outout resistances respectively)
D
$${R_i}$$ increases and $${R_0}$$ increases
($${R_i}$$ and $${R_0}$$ denote the input and outout resistances respectively)
4
GATE ECE 2000
+2
-0.6
The most commonly used Amplifier in sample and hold circuit is
A
A unity gain inverting Amplifier
B
A unity gain non-inverting inverting Amplifier
C
An inverting Amplifier with a gain of 10.
D
An inverting Amplifier with a gain of 100.
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