1
GATE ECE 2012
MCQ (Single Correct Answer)
+2
-0.6
The signal m(t) as shown is applied both to a phase modulator (with
kp
as the phase constant) and
a frequency modulator (with
kf
as the frequency constant) having the same carrier frequency.

The ratio kp/kf (in rad/Hz) for the same maximum phase deviation is
2
GATE ECE 2008
MCQ (Single Correct Answer)
+2
-0.6
The signal $$\cos\;\omega_ct\;+\;0.5\;\cos\;\omega_mt\;s\mathrm{in}\;\omega_ct$$ is
3
GATE ECE 2007
MCQ (Single Correct Answer)
+2
-0.6
A Hilbert transformer is a
4
GATE ECE 2006
MCQ (Single Correct Answer)
+2
-0.6
The diagonal clipping in Amplitude Demodulation (using envelope detector) can
be avoided if RC time-constant of the envelope detector satisfies the following
condition, (here W is message bandwidth and ωc
is carrier frequency both in
rad/sec)
Questions Asked from Analog Communication Systems (Marks 2)
Number in Brackets after Paper Indicates No. of Questions
GATE ECE Subjects
Network Theory
Control Systems
Electronic Devices and VLSI
Analog Circuits
Digital Circuits
Microprocessors
Signals and Systems
Representation of Continuous Time Signal Fourier Series
Fourier Transform
Continuous Time Signal Laplace Transform
Discrete Time Signal Fourier Series Fourier Transform
Discrete Fourier Transform and Fast Fourier Transform
Discrete Time Signal Z Transform
Continuous Time Linear Invariant System
Discrete Time Linear Time Invariant Systems
Transmission of Signal Through Continuous Time LTI Systems
Sampling
Transmission of Signal Through Discrete Time Lti Systems
Miscellaneous
Communications
Electromagnetics
General Aptitude