Practice previous years' questions for Electromagnetics, Antennas, Microwave Engineering, Digital Communication, Signals & Systems, Analog Electronics, VLSI, and Optical Communications.
Marking scheme: +3.00 positive, -0.75 negative (ICRB Standard).
Impedance characteristics on a Smith Chart repeat after a distance of:
If τ is the time constant and ω is the applied frequency, a low pass RC filter acts as a pure integrator when:
10μF capacitor is connected across secondary winding of a high frequency transformer having primary to secondary turns ratio 5:2. What is the value of capacitance seen across primary?
What will be the output of the following circuit, if point-P is stuck at 1?
For the current mirror circuit shown below, if the emitter area of Q2 is thrice of Q1, the current I is:
Output of an Op-amp is 1V peak, and slew rate is 5V/μs. The maximum frequency of input sinusoidal signal that can be reproduced is:
What is the division factor of the following clock divider circuit?
For the circuit given below, the voltage Vo across the op-amp output is:
The rms value of current $i(t) = I_1\sin\omega t + I_2\sin 2\omega t$ is:
Given the output for the following non-inverting summing amplifier, the relation between Rf and R in the circuit is:
$$V_o = \{V_1 + V_2 + V_3 + V_4\} / 2$$
A pulse signal having 100 kHz frequency and 70 nsec rise time is to be measured on an oscilloscope. The minimum required bandwidth of the oscilloscope is,
Multiple collectors are used in Traveling Wave Tube (TWT) to:
A lossless antenna has directional gain $G(\theta,\phi)$, then $\int_{\phi=-\pi/2}^{\pi/2}\int_{\theta=-\pi/2}^{\pi/2} G(\theta,\phi)\,d\Omega$ is :
$\sqrt[3]{\cos x - j\sin x}$ is equal to
If $f(t)$ is 1 MHz sinusoid with 1 Vp-p and sampling frequency fs is 25KHz, the output will be :
For a practical low pass filter, the ideal amplitude and phase response will be :
A 10dB attenuator is put at the input of a low noise amplifier having 3dB noise figure. Now the noise figure of the cascaded amplifier will be
A 33.33% duty cycle rectangular wave is fed to the input of an Spectrum Analyzer. What will be observed?
Phase function of a filter is $\phi(f) = k f^2$, $k > 0$. The group delay of the filter has the shape
1V p-p sinusoid is digitized by a 4 bit A-to-D converter with input dynamic range of 2V p-p. The signal to noise ratio of the digitized signal is: