1

GATE ECE 2022

MCQ (Single Correct Answer)

+1

-0.33

Consider an FM broadcast that employs the pre-emphasis filter with frequency response

$${H_{pe}}(\omega ) = 1 + {{j\omega } \over {{\omega _0}}}$$,

where $$\omega$$_{0}= 10

^{4}rad/sec.

For the network shown in the figure to act as a corresponding de-emphasis filter, the appropriate pairs of (R, C) values is/are ____________.

2

GATE ECE 2016 Set 3

Numerical

+1

-0

For a superheterodyne receiver, the intermediate frequency is 15 MHz and the local oscillator frequency
is 3.5 GHz. If the frequency of the received signal is greater than the local oscillator frequency, then
the image frequency (in MHz) is _________.

Your input ____

3

GATE ECE 2016 Set 1

Numerical

+1

-0

A super heterodyne receiver operates in the frequency range of 58 MHz – 68 MHz. The
intermediate frequency f

_{1F}and local oscillator frequency f_{L0}are chosen such that f_{1F}$$\leq$$ f_{L0}.It is required that the image frequencies fall outside the 58 MHz – 68 MHz band. The minimum required f_{1F}(in MHz) is ___________.Your input ____

4

GATE ECE 2015 Set 1

MCQ (Single Correct Answer)

+1

-0.3

Consider the signal
$$s\left(t\right)\;=\;m\left(t\right)\;\cos\left(2{\mathrm{πf}}_\mathrm c\mathrm t\right)\;+\widehat m\left(t\right)\;\sin\left(2\mathrm\pi\;{\mathrm f}_\mathrm c\mathrm t\right)$$ where $$\widehat m\left(t\right)\;$$
denotes the Hilbert
transform of m(t) and the bandwidth of m(t) is very small compared to f

_{c}. The signal s(t) is aQuestions Asked from Analog Communication Systems (Marks 1)

Number in Brackets after Paper Indicates No. of Questions

GATE ECE Subjects

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

Network Theory

Control Systems

Digital Circuits

General Aptitude

Electronic Devices and VLSI

Analog Circuits

Engineering Mathematics

Microprocessors

Communications

Electromagnetics