List of top Electronics and Communication Engineering Questions

The image channel selectivity of super heterodyne receiver depends upon ________.
A narrow band FM signal is generated using a phase modulator. The maximum deviation at the output of a phase modulator is about________.
A pre-emphasis circuit provides extra noise-immunity by________.
To save transmitted power, the carrier of an AM signal obtained by sinusoidal modulation to a depth of modulation equal to 1, has been recovered. The percentage saving in power is________.
Given the unity feedback system with \( G(s) = \frac{K}{s(s+6)} \), the value of \( K \) for damping ratio of 0.75 is ________.
A phase lag compensation will ________.
In a signal \( x(n) \), if ‘n’ is replaced by \( \frac{n}{3} \), then it is called ________.
The discrete time Fourier transform of the signal, \( x(n) = 0.5^{(n-1)}u(n-1) \) is ________.
The Z-transform of \( a^n \cdot u(n-1) \) is ________.
Which of the following system is causal?
A Schmitt trigger is ________.
How many T states are required for the execution of STA 7000H instruction?
Which IC is used for the implementation of 1-to-16 DEMUX?
In a negative feedback amplifier \( A = 100 \), \( \beta = 0.04 \) and \( V_s = 50\,\text{mV} \), then feedback will be _______.
In a LASER, which of the following processes have to be minimized.
Output of a phase splitter is _______________.
Primary advantage of a crystal oscillator is that ________.
In superposition theorem, voltage source is replaced by ________ and current source by ________.
For a base current of 10 \(\mu\)A, what is the value of collector current in common emitter, if \(\beta = 100\)?
The current flowing through an unloaded voltage divider is called the ________.
A voltage source of 300 V has internal resistance of 4\(\Omega\) and supplies a load having the same resistance. The power absorbed by the load is
A phase lag-lead network introduces in the output_______.
In AM_______.
An antenna has directivity of 100 and operates at 150 MHz. The maximum effective aperture is
Determine the Laplace transform of \(x(t) = (t^2 - 2t)u(t - 1)\)