The circuit of Fig. is an example of feedback of the following type

The emitter coupled pair of BJT’s gives a linear transfer relation between the differential output voltage and the diffe

From a measurement of the rise time of the output pulse of an amplifier whose input is a small amplitude square wave, on

For full wave rectification, a four diode bridge rectifier is claimed to have the following advantages over a two diode

Implement a monostable multivibrator using the timer circuit shown, in Fig. Also determine an expression for ON time T o

In a shunt-shunt negative feedback Amplifier, as compared to the basic Amplifier,

In a differential Amplifier, CMRR can be improved by using an increased

One input terminal of high gain comparator circuit is connected to ground and a sinusoidal voltage is applied to the oth

Find the value of $${R^1}$$ in the circuit of fig. For generating sinusoidal Oscillations. Find the frequency of oscilla

In the MOSFET amplifier of the figure the signal output V1 and V2 obey the relationship

The $${f_T}$$ of a BJT is related to its $${g_{m,}}\,\,{C_\pi }$$ and $${C_\mu }$$ as follows

In the circuit of fig. Determine the resistance Ro seen by the output terminals, ignore the effects of R1 and R2.

In a series regulated power supply circuit, the voltage gain Av of the ‘pass’ transistor satisfies the condition:

For a given data rate, the bandwidth Bp of a BPSK signal and the band width B0 of the OOK signal are related as

In a PCM system with uniform quantization, increasing the number of bits from 8 to 9 will reduce the quantization noise

Compression in PCM refers to relative compression of

Quadrature multiplexing is

The probability density function of the envelope of narrow band Gaussian noise is

The ACF of a rectangular pulse of duration T is

The amplitude spectrum of a Gaussian pulse is

A DSB-SC signal is generated using the carrier $$\cos\left(\omega_ct\;+\;\theta\right)$$ and modulating singal x(t). The

The image channel selectivity of super heterodyne receiver depends upon

The number of roots of $$s^3\;+\;5s^2\;+\;7s\;+\;3\;=\;0$$ in the left half of the s-plane are

The unit impulse response of a linear time invariant system is the unit step function u(t). For t>0, the response of

If $$F\left(s\right)\;=\;\frac\omega{s^2\;+\;\omega^2}$$, then the value of $$\underset{t\rightarrow\infty}{\lim\;}f\lef

Consider a unity feedback control system with open-loop transfer function $$G\left(s\right)\;=\;\frac K{s\left(s\;+\;1\r

The loop transfer function of a single loop control system is given by $$G(s)H(s) = {{100} \over {s\left( {1 + 0.01s} \r

The transfer function of a phase lead controller is $${\textstyle{{1 + 3Ts} \over {1 + Ts}}}.$$ The maximum value of ph

The Nyquist plot of a loop transfer function G$$(j\omega )$$ H$$(j\omega )$$, of a system encloses the (-1, j0) point. T

In the Bode-plot of a unity feedback control system, the value of phase of G($$j\omega $$) at the gain cross over freque

The characteristic equation of a feedback control system is $$$s^4+20s^3+15s^2+2s+K\;=\;0$$$ (i) Determine the range of

Consider the system shown in Fig. Determine the value of 'a' such that the damping ratio is 0.5. Also obtain the value

The open loop transfer function of a unity feedback open-loop system is $$\frac{2s^2+6s+5}{\left(s+1\right)^2\left(s+2\r

Consider a feedback control system with loop transfer function $$$G\left(s\right)H\left(s\right)=\frac{K\left(1+0.5s\rig

Draw a signal flow graph for the following set of algebraic equations: $$$\begin{array}{l}y_2=ay_1-\;gy_3\\y_3=ey_2+\;cy

The transfer function of a tachometer is of the form

The mod-5 counter shown in figure counts through states Q2 Q1 Q0 = 000, 001, 010, 011 and 100. (a) Will the counter

For an ADC, match the following : if List 1 A. Flash converter B. Dual slope converter C. Successive approximation C

The advantage of using a dual slope ADC in a digital voltmeter is that

In figure, A = 1 and B = 1. The input B is now replaced by a sequence 101010 ___, the outputs x and y will be

The noise margin of a TTL gate is about

The threshold voltage for each transistor in Fig.2.5, is 2V. For this circuit to work as an inverter, Vi must take the v

Figure shows a mod-K counter, Here K is equal to

Two 2' s complement numbers having sign bits x and y added and the sign bit of the result is z. Then, the occurrence of

An equivalent 2’s complement representation of the 2’s complement number 1101 is

The K-map for a Boolean function is shown in figure. The number of essential prime implicants for this function is

The electric field vector of a wave is given as $$$\vec E = {E_0}{\mkern 1mu} {e^{j\left( {\omega t + 3x - 4y} \right)}

The region between a pair of parallel perfectly conducting planes of infinite extent in the y and z directions is partia

A rectangular waveguide with inner dimensions 6 cm $$ \times $$ 3 cm has been designed for a single mode operation. Find

The vector $$\mathop H\limits^ \to $$ in the far field of an antenna satisfiels

The far field of an antenna varies with distance r as

The radiation resistance of a circular loop of one turn is 0.01 $$\Omega $$. The radiation resistance of five turns of s

An antenna in free space receives 2$$\mu $$ W of power when the incident electric field is 20 m V/m rms. The effective a

A plane wave with $$\overrightarrow E = 10\,{e^{j\left( {\omega t - \beta z} \right)\,}}\,\,{\overrightarrow a _{_y}}$$

The time averaged Poynting vector, in W/m2, for a wave with $$\vec E = 24{e^{j\left( {\omega t + \beta z} \right)}}{\mke

The polarization of a wave with electric field vector $$\overrightarrow E = {E_0}\,{e^{j\left( {\omega t - \beta z} \ri

All transmission line sections shown in Fig. have characteristic impedance $${R_0}\, + \,j0$$. The input impedance $${Z_

The wavelength of a wave with propagation constant $$\left( {0.1\,\pi + j\,0.2\pi } \right){m^{ - 1}}$$ is

The intrinsic impedance of copper at high frequencies is

The depth of penetration of a wave in a lossy dielectric increases with increasing

The Maxwell's equation $$\nabla\times\overrightarrow H\;=\;\overrightarrow J\;+\;\frac{\partial\overrightarrow D}{\parti

A loop is rotating about the y-axis in a magnetic field $$$\overrightarrow B\;=\;B_0\cos\left(\mathrm{ωt}\;+\;\mathrm\ph

The static characteristic of an adequately forward biased p-n junction is a straight line, if the plot is of

For small signal a.c. operation, a practical forward biased diode can be modeled as

If $$\,\,\,L\,\,\left\{ {f\left( t \right)} \right\} = {w \over {{s^2} + {w^2}}}$$ then the value of $$\mathop {Lim}\li

The eigen values of the matrix $$A = \left[ {\matrix{ 0 & 1 \cr 1 & 0 \cr } } \right]$$ are

An instruction used to set the carry flag in a computer can be classified as

An I/O processor control the flow of information between

Determine the frequency of resonance and the resonant impedance of the parallel circuit shown in figure. What happens wh

The parallel $$RLC$$ circuit shown in figure is in resonance. In this circuit

A network has 7 nodes and 5 independent loops. The number of branches in the network is

The short-circuit admittance matrix of a two-port network is $$$\begin{bmatrix}0&-\frac12\\\frac12&0\end{bmatrix

A voltage source of internal impedance $${\mathrm R}_\mathrm s\;+\;{\mathrm{jX}}_\mathrm s$$ supplies power to a load of

Superposition theorem is NOT applicable to networks containing

The voltage across the terminals a and b in Fig. is

The Nodal method of circuit analysis is based on

The Fourier transform of a function x(t) is X(f). The Fourier transform of $${{dx(t)} \over {dt}}$$ will be

Flat top sampling of low pass signals

Consider a rectangular pulse g(t) existing between $$t = \, - {T \over 2}\,and\,{T \over 2}$$. Find and sketch the pulse

The unit impulse response of a linear time invariant system is the unit step function u(t). For t>0, the response of

The transfer function of a zero - order - hold system is

The z - transform of the time function $$\sum\limits_{k = 0}^\infty {\delta \left( {n - k} \right)} $$ is

If L$$\left[ {f\left( t \right)} \right]$$ = $$\omega /\left( {{s^2} + {\omega ^2}} \right),$$ then the value of $$\matr

The ACF of a rectangular pulse of duration T is

The Fourier transform of a voltage of a voltage signal x(t) is X(f). The unit of |X(f)| is

The amplitude spectrum of a Gaussian pulse is

The trigonometric Fourier series of a periodic time function can have only