Three identical RC-Coupled transistor amplifiers are cascaded. If each of the amplifiers has a frequency response as sho

Consider the following statements in connection with the CMOS inverter in the Figure. Where both the MOSFETS are of enha

The circuit in the figure employs positive Feedback and is intended to generate sinusoidal oscillation. If at a frequenc

In a negative feedback amplifier using voltage - Series (i.e., voltage - sampling, series mixing) feedback

If the variance $$\sigma _d^2$$ of d(n) = x(n - 1) is one-tenth the variance $$\sigma _x^2$$ of a stationary zero-mean d

For a bit-rate of 8 kbps, the best possible values of the transmitted frequencies in a coherent binary FSK system are

A 1 MHz sinusoidal carrier is amplitude modulated by a symmetrical square wave of period 100 µsec. Which of the followin

The transfer function of a system is $$G\left(s\right)\;=\;\frac{100}{\left(s\;+\;1\right)\left(s\;+\;100\right)}$$.For

The system shown in Figure remains stable when

The characteristic polynomial of a system is q(s) = 2s5 + s4 + 4s3 + 2s2 + 2s + 1. The system is

Which of the following points is NOT on the root locus of a system with the open loop transfer function $$$G\left(s\righ

Consider a system with the transfer function $$$G\left(s\right)=\frac{s+6}{Ks^2+s+6}$$$ Its damping ratio will be 0.5 wh

The phase margin of a system with the open-loop transfer function G(s)H(s)=$${{(1 - s)} \over {(1 + s)(2 + s)}}$$ is?

The system with the open loop transfer function G(s)H(s)=$${1 \over {s\left( {{s^2} + s + 1} \right)}},$$ has a gain mar

The Nyquist plot of an all-pole second order open-loop system is shown in Figure. Obtain the transfer function of the s

A unity feedback system has the plant transfer function Gp(s)=$${1 \over {\left( {s + 1} \right)\left( {2s + 1} \right)}

The transfer function Y(s)/U(s) of a system described by the state equations $$\mathop x\limits^ \bullet $$(t) = -2x(t

The block diagram of a linear time invariant system is given in Figure is (a) Write down the state variable equations

The number of comparators required in a 3-bit comparator type ADC is

It is required to design a binary mod-5 synchronus counter using AB flip-flops such that the output Q2Q1Q0 changes as $$

If the input X$$_3$$, X$$_2$$, X$$_1$$, X$$_0$$ to the ROM in figure 2.12 are 8-4-2-1 BCD numbers, then the outpus are

4-bit 2’s complement representation of a decimal number is 1000. The number is

If the input to the digital circuit (in the figure) consisting of a cascade of 20 XOR-gates is X then the output Y is eq

The gates G1 and G2 in figure have propagation delays of 10nsec and 20nsec respectively. If the input Vi makes an abrupt

The inputs to a digital circuit shown in Figure 9(a) are the external signals A, B and C. ( $$\overline A \,\overline

The VSWR can have any value between

In an impedance Smith chart, a clockwise movement along a constant resistance circle gives rise to

A plane wave is characterized by $$$\overrightarrow E = \left( {0.5\mathop x\limits^ \cap + \mathop y\limits^ \cap

Distilled water at $${25^ \circ }C$$ is characterized by $$\sigma = 1.7 \times {10^{ - 4}}$$ mho/m and $$ \in = 78{ \i

The phase velocity for the $$T{E_{10}}$$ mode in an air-filled rectangular waveguide is

A person with a receiver is 5 Km away from the transmitter. What is the distance that this person must move further to d

Consider a linear array of two half - wave dipoles A and B as shown in Fig. The dipoles are $${\lambda \over 4}$$ apart

The line-of-sight communication requires the transmit and receive antennas to face each other. If the transmit antenna i

Consider a parallel plate waveguide with plate separation d as shown in Fig. The electric and magnetic fields for the TE

Consider a parallel plate waveguide with plate separation d as shown in Fig. The electric and magnetic fields for the TE

Consider a parallel plate waveguide with plate separation d as shown in Fig. The electric and magnetic fields for the TE

The intrinsic carrier concentration of silicon sample at 300oK is $$1.5\times10^{16}/m^3$$. If after doping, the number

The band gap of silicon at 300 K is

In the figure, a silicon diode is carrying a constant current of 1 mA. When the temperature of the diode is 20°C, VD is

If the transistor in Figure is in saturation, then

The contents of Register (B) and Accumulator (A) of 8085 microprocessor are 49H and 3AH respectively. The contents of A

Consider the following assembly language program. The execution of the above program in an 8085 microprocessor will re

The switch in Fig. has been in position $$1$$ for a long time and is then moved to position $$2$$ at $$t\, = \,0$$. (a)

For network shown in Fig. $$R\, = \,1\,k\Omega $$ $${L_1} = 2\,H,\,{L_2} = 5\,H,\,{L_3}\, = \,1H,{L_4} = 4H\,\,\,$$ and

Consider the network in Fig. (a) Find its short-circuit admittance parameters. (b) Find the open-ciruit impedance $${Z

The dependent current source shown in Figure

In the network of Figure, the maximum power is delivered to RL if its value is

In figure, the switch was closed for a long time before opening at t = 0. the voltage Vx at t = 0+ is

If the 3-phase balanced source in Fig. delivers 1500 W at a leading power factor of 0.844, then the value of ZL (in ohm)

The differential equation for the current i(t) in the circuit of Fig. is

The Fourier transform F $$\left\{ {{e^{ - t}}u(t)} \right\}$$ is equal to $${1 \over {1 + j2\pi f}}$$. Therefore, $$F\le

The Laplace transform of a continuous - time signal x(t) is $$X\left( s \right) = {{5 - s} \over {{s^2} - s - 2}}$$. If

Convolution of x(t + 5) with impulse function $$\delta \left( {t\, - \,7} \right)$$ is equal to

A deterministic signal x(t) = $$\cos (2\pi t)$$ is passed through a differentiator as shown in Figure. (a) Determine th

If the impulse response of a discrete-time system is $$h\left[ n \right]\, = \, - {5^n}\,\,u\left[ { - n\, - 1} \right],

Consider a sampled signal $$y\left( t \right) = 5 \times {10^{ - 6}}\,x\left( t \right)\,\,\sum\limits_{n = - \infty }^

A linear phase channel with phase delay $${\tau _p}$$ and group delay $${\tau _g}$$ must have

In Fig. m(t) = $$ = {{2\sin 2\pi t} \over t}$$, $$s(t) = \cos \,200\pi t\,\,andn(t) = {{\sin 199\pi t} \over t}$$. The

A signal x(t) = 100 cos $$(24\pi \times {10^3})$$ t is ideally sampled with a sampling period of 50 $$\mu \sec $$ and t

Which of the following cannot be the Fourier series expansion of a periodic signal?