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).
When a microprocessor interfaces with a peripheral or memory device, the normal timing of the microprocessor may need to be altered by introducing
$$\int_{0}^{\pi/2} (\cos^3 x) \, dx =$$
In phase modulated signal, the frequency deviation is proportional to
For a fast communication which of the following requirements have to be met
For an earth station transmitter input power of 40dBW (10,000W), with a back off loss of 3dB, a total branching and feeder loss of 3dB, and a transmit antenna gain of 40 dB, determine the EIRP.
_____ is used to describe the light gathering or light collecting ability of an optical fiber
_____ has the maximum fan out capacity
If Z transform of $x(n)$ is $X(z)$ then the Z transform of $x(n-k)$ is
The following code will implement a
process (clk, d) begin
if (clk = '1') then
q <= d;
end if;
end processThe greatest negative number which can be stored in a 8-bit register using 2's complement arithmetic is
Two coupled coils have self inductances $L_1 = 10\text{mH}$ and $L_2 = 20\text{mH}$. The co-efficient of coupling ($K$) being 0.75 in the air. Voltage in the second coil when the current in circuit is given by $I = 2\sin(314t)\text{ A}$ is
In a radar system, if the peak transmitted power is increased by a factor of 16 and the antenna diameter is increased by a factor of 2, then the maximum range will increase by a factor of
The transconductance $g_m$ of an FET in the saturation region equals
The transistor amplifier with 85% of efficiency is likely to be
A run-time stack cannot be used in a round-robin scheduling system because of the _____ nature of scheduling.
$(3 + i) / (5 + 5i)$ is same as
The modulation index of an amplitude modulated wave is changed from 0 to 1. the transmitted power is
In a communication system, each message (1 or 0) is transmitted three times in order to reduce the probability of error. The detection is based on the majority rule at the receiver. If $P_e$ is the probability of bit error, the probability of error for this communication channel will be
For a satellite transponder with a receiver antenna gain of 12 dB, an LNA gain of 10 dB, and equivalent noise temperature of 26 dBK, the $G/T_e$ is
_____ current is the leakage current that flows through a photo diode with no input used in as light detectors.
The figure of merit of a logic family is given by
_____ is defined as the time delay that a signal component of frequency undergoes as it passes from the input to output of the system.
Which statement is true regarding a behavior modeling in VHDL
The process of imitating one system with another so that the imitating systems accepts the same data, executes same programs and achieves same results as the imitated systems is known as
The values of R, L and C in series RLC circuit that resonates at 1.5 KHz and consumes 50W from a 50V ac source operating at the resonant frequency. The bandwidth is 0.75 KHz.