For a given sample-and-hold circuit, if the value of the hold capacitor is increased, then

If the emitter resistance in a common-emitter voltage amplifier is not bypassed, it will

Consider the common-collector amplifier in the figure (bias circuitry ensures that the transistor operates in forward ac

A BJT in common-base configuration is used to amplify a signal received by a $$50\,\Omega $$ antena. Assume kT/q = 25 m

For the common collector amplifier shown in the figure, the BJT has high $${V_{CE\left( {sat} \right)}},$$ and $${V_{BE

The circuit shown represents

An M - level PSK modulation scheme is used to transmit independent binary digits over a band-pass channel with bandwidth

Consider the Z- channel given in the figure. The input is 0 or 1 with equal probability. If the output is 0, the probab

If calls arrive at a telephone exchange such that the time of arrival of any call is independent of the time of arrival

Consider a discrete-time channel Y = X + Z, where the additive noise Z is signal- dependent. In particular, given the tr

Consider a communication scheme where the binary valued signal X satisfies P{X = + 1} = 0.75 and P {X = - 1} = 0.25. The

For the second order closed-loop system shown in the figure, the natural frequency (in rad/s) is

Consider a transfer function $$G_p\left(s\right)\;=\;\frac{ps^2+3ps\;-2}{s^2+\left(3+p\right)s\;+\left(2-p\right)}$$ wit

The characteristic equation of a unity negative feedback system 1 + KG(s) = 0. The open loop transfer function G(s) has

In a Bode magnitude plot, which one of the following slopes would be exhibited at high frequencies by a 4th order all-po

The state transition matrix $$\phi \left( t \right)$$ of a system $$$\left[ {\matrix{ {\mathop {{x_1}}\limits^ \bull

In the circuit shown in the figure, if C = 0, the expression for Y is

A 16-bit ripple carry adder is realized using 16 identical full adders (FA) as shown in the figure. The carry-propagatio

An 8-to-1 multiplexer is used to implement a logical function Y as shown in the figure. The output Y is given by

The output (Y) of the circuit shown in the figure is

For an antenna radiating in free space, the electric field at a distance of 1 km is found to be 12 m V/m. Given that int

Match column A with column B. Column 1. Point electromagnetic source 2. Dish antenna 3. Yagi-Uda antenna Colum

If $$\overrightarrow{\mathrm E}=-\left(2\mathrm y^2\;-3\mathrm{yz}^2\right)\widehat{\mathrm x}\;-\left(6\mathrm{xy}^2-3\

The electric field (assumed to be one-dimensional) between two points A and B is shown. Let $$\psi_A$$ and $$\psi_B$$ be

Consider two BJT's biased at the same collector current with area A1 = 0.2 μm × 0.2 μm and A2 = 300 μm × 300 μm. Assumin

In the figure ln(ρi) is plotted as a function of 1/T, where ρi the intrinsic resistivity of silicon, T is is the tempera

The cut-off wavelength (in µm) of light that can be used for intrinsic excitation of a semiconductor material of bandgap

Consider a silicon sample doped with ND = 1×1015/cm3 donor atoms. Assume that the intrinsic carrier concentration ni = 1

An N-type semiconductor having uniform doping is biased as shown in the figure. If EC is the lowest energy level of th

The series $$\sum\limits_{n = 0}^\infty {{1 \over {n!}}\,} $$ converges to

For a right angled triangle, if the sum of the lengths of the hypotenuse and a side is kept constant, in order to have m

The magnitude of the gradient for the function $$f\left( {x,y,z} \right) = {x^2} + 3{y^2} + {z^3}\,\,$$ at the point $$(

The directional derivative of $$f\left( {x,y} \right) = {{xy} \over {\sqrt 2 }}\left( {x + y} \right)$$ at $$(1, 1)$$

Given $$\,\,\overrightarrow F = z\widehat a{}_x + x\widehat a{}_y + y\widehat a{}_z.\,\,$$ If $$S$$ represents the po

If calls arrive at a telephone exchange such that the time of arrival of any call is independent of the time of arrival

Parcels from sender $$S$$ to receiver $$R$$ pass sequentially through two post - offices. Each post - office has a proba

Let $$X$$ be a zero mean unit variance Gaussian random variable. $$E\left[ {\left| X \right|} \right]$$ is equal to ____

With initial values $$\,\,\,y\left( 0 \right) = y'\left( 0 \right) = 1,\,\,\,$$ the solution of the differential equati

If $$a$$ and $$b$$ are constants, the most general solution of the differential equation $$\,{{{d^2}x} \over {d{t^2}}}

The unilateral Laplace transform of $$f(t)$$ is $${1 \over {{s^2} + s + 1}}$$. Which one of the following is the unilate

An 8085 microprocessor executes “STA 1234H” with starting address location 1FFEH (STA copies the contents of the Accumu

The steady state output of the circuit shown in the figure is given by $$$y\left( t \right) = {\rm A}\left( \omega \ri

The equivalent resistance in the infinite ladder network shown in the figure, is$${R_e}$$ The value of $${R_e}/R$$ is

The magnitude of current (in mA) through the resistor R2 in the figure shown is _____.

In the circuit shown in the figure, the value of V0(t) (in Volts) for $$t\rightarrow\infty$$ is ______.

For the two-port network shown in the figure, the impedance (Z) matrix (in Ω) is

The circuit shown in the figure represents a

The unilateral Laplace transform of F(t) is $${1 \over {{s^2} + s + 1}}$$. Which one of the following is the unilateral

A stable linear time invariant (LTI) system has a transfer function H(s) = $${1 \over {{s^2} + s - 6}}$$. To make this s

A casual LTI system has zero initial conditions and impulse response h(t). Its input x(t) and output y(t) are related th

The N-point DFT X of a sequence x[n] 0 ≤ n ≤ N − 1 is given by $$X\left[ k \right] = {1 \over {\sqrt N }}\,\,\sum\lim

The sequence x $$\left[ n \right]$$ = $${0.5^n}$$ u[n], where u$$\left[ n \right]$$ is the unit step sequence, is conv

A real - values signal x(t) limited to the frequency band $$\left| f \right| \le {W \over 2}$$ is passed through a linea

A Fourier transform pair is given by $${\left( {{2 \over 3}} \right)^n}$$ u $$\left[ {n + 3} \right]\,\mathop \Leftrigh