1
GATE ECE 2005
MCQ (Single Correct Answer)
+1
-0.3
Which of the following analog modulation scheme requires the minimum
transmitted power and minimum channel bandwidth?
2
GATE ECE 2004
MCQ (Single Correct Answer)
+1
-0.3
An AM signal and a narrow-band FM signal with identical carriers, modulating
signals and modulation indices of 0.1 are added together. The resultant signal
can be closely approximated by
3
GATE ECE 2004
MCQ (Single Correct Answer)
+1
-0.3
An AM signal is detected using an envelope detector. The carrier frequency and
modulating signal frequency are 1 MHz and 2 KHz respectively. An appropriate
value for the time constant of the envelope detector is
4
GATE ECE 2002
MCQ (Single Correct Answer)
+1
-0.3
A 1 MHz sinusoidal carrier is amplitude modulated by a symmetrical square wave
of period 100 µsec. Which of the following frequencies will NOT be present in the
modulated signal?
Questions Asked from Marks 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