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Analog Circuits
Bipolar Junction Transistor
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FET and MOSFET
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Oscillators
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Operational Amplifier
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555 Timer
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Frequency Response
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Diodes
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Feedback Amplifier
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Power Amplifier
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1
GATE ECE 2002
MCQ (Single Correct Answer)
+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)
2
GATE ECE 2000
MCQ (Single Correct Answer)
+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.
3
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
$$100 k\,\Omega \,and\,1 \,\Omega $$
4
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
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Questions Asked from Marks 2
GATE ECE 2004 (1) GATE ECE 2003 (1) GATE ECE 2002 (1) GATE ECE 2000 (1) GATE ECE 1999 (2) GATE ECE 1997 (1) GATE ECE 1991 (1) GATE ECE 1989 (1)
GATE ECE Subjects
Signals and Systems
Network Theory
Control Systems
Digital Circuits
General Aptitude
Electronic Devices and VLSI
Analog Circuits
Engineering Mathematics
Microprocessors
Communications
Electromagnetics