GATE ECE 1998
View Questions

GATE ECE

For full wave rectification, a four diode bridge rectifier is claimed to have the following advantages over a two diode
View Question
The emitter coupled pair of BJT’s gives a linear transfer relation between the differential output voltage and the diffe
View Question
The circuit of Fig. is an example of feedback of the following type
View Question
From a measurement of the rise time of the output pulse of an amplifier whose input is a small amplitude square wave, on
View Question
In a series regulated power supply circuit, the voltage gain Av of the ‘pass’ transistor satisfies the condition:
View Question
In the circuit of fig. Determine the resistance Ro seen by the output terminals, ignore the effects of R1 and R2.
View Question
The $${f_T}$$ of a BJT is related to its $${g_{m,}}\,\,{C_\pi }$$ and $${C_\mu }$$ as follows
View Question
In the MOSFET amplifier of the figure the signal output V1 and V2 obey the relationship
View Question
Find the value of $${R^1}$$ in the circuit of fig. For generating sinusoidal Oscillations. Find the frequency of oscilla
View Question
One input terminal of high gain comparator circuit is connected to ground and a sinusoidal voltage is applied to the oth
View Question
In a differential Amplifier, CMRR can be improved by using an increased
View Question
In a shunt-shunt negative feedback Amplifier, as compared to the basic Amplifier,
View Question
Implement a monostable multivibrator using the timer circuit shown, in Fig. Also determine an expression for ON time T o
View Question
The image channel selectivity of super heterodyne receiver depends upon
View Question
A DSB-SC signal is generated using the carrier $$\cos\left(\omega_ct\;+\;\theta\right)$$ and modulating singal x(t). The
View Question
Quadrature multiplexing is
View Question
Compression in PCM refers to relative compression of
View Question
In a PCM system with uniform quantization, increasing the number of bits from 8 to 9 will reduce the quantization noise
View Question
For a given data rate, the bandwidth Bp of a BPSK signal and the band width B0 of the OOK signal are related as
View Question
The amplitude spectrum of a Gaussian pulse is
View Question
The ACF of a rectangular pulse of duration T is
View Question
The probability density function of the envelope of narrow band Gaussian noise is
View Question
Consider a unity feedback control system with open-loop transfer function $$G\left(s\right)\;=\;\frac K{s\left(s\;+\;1\r
View Question
If $$F\left(s\right)\;=\;\frac\omega{s^2\;+\;\omega^2}$$, then the value of $$\underset{t\rightarrow\infty}{\lim\;}f\lef
View Question
The unit impulse response of a linear time invariant system is the unit step function u(t). For t>0, the response of
View Question
The number of roots of $$s^3\;+\;5s^2\;+\;7s\;+\;3\;=\;0$$ in the left half of the s-plane are
View Question
The transfer function of a tachometer is of the form
View Question
Draw a signal flow graph for the following set of algebraic equations: $$$\begin{array}{l}y_2=ay_1-\;gy_3\\y_3=ey_2+\;cy
View Question
Consider a feedback control system with loop transfer function $$$G\left(s\right)H\left(s\right)=\frac{K\left(1+0.5s\rig
View Question
The open loop transfer function of a unity feedback open-loop system is $$\frac{2s^2+6s+5}{\left(s+1\right)^2\left(s+2\r
View Question
Consider the system shown in Fig. Determine the value of 'a' such that the damping ratio is 0.5. Also obtain the value
View Question
The characteristic equation of a feedback control system is $$$s^4+20s^3+15s^2+2s+K\;=\;0$$$ (i) Determine the range of
View Question
In the Bode-plot of a unity feedback control system, the value of phase of G($$j\omega $$) at the gain cross over freque
View Question
The Nyquist plot of a loop transfer function G$$(j\omega )$$ H$$(j\omega )$$, of a system encloses the (-1, j0) point. T
View Question
The loop transfer function of a single loop control system is given by $$G(s)H(s) = {{100} \over {s\left( {1 + 0.01s} \r
View Question
The transfer function of a phase lead controller is $${\textstyle{{1 + 3Ts} \over {1 + Ts}}}.$$ The maximum value of ph
View Question
An equivalent 2’s complement representation of the 2’s complement number 1101 is
View Question
The K-map for a Boolean function is shown in figure. The number of essential prime implicants for this function is
View Question
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
View Question
Figure shows a mod-K counter, Here K is equal to
View Question
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
View Question
The noise margin of a TTL gate is about
View Question
In figure, A = 1 and B = 1. The input B is now replaced by a sequence 101010 ___, the outputs x and y will be
View Question
The advantage of using a dual slope ADC in a digital voltmeter is that
View Question
For an ADC, match the following : if List 1 A. Flash converter B. Dual slope converter C. Successive approximation C
View Question
The mod-5 counter shown in figure counts through states Q2 Q1 Q0 = 000, 001, 010, 011 and 100. (a) Will the counter
View Question
A loop is rotating about the y-axis in a magnetic field $$$\overrightarrow B\;=\;B_0\cos\left(\mathrm{ωt}\;+\;\mathrm\ph
View Question
The Maxwell's equation $$\nabla\times\overrightarrow H\;=\;\overrightarrow J\;+\;\frac{\partial\overrightarrow D}{\parti
View Question
The depth of penetration of a wave in a lossy dielectric increases with increasing
View Question
The intrinsic impedance of copper at high frequencies is
View Question
The wavelength of a wave with propagation constant $$\left( {0.1\,\pi + j\,0.2\pi } \right){m^{ - 1}}$$ is
View Question
All transmission line sections shown in Fig. have characteristic impedance $${R_0}\, + \,j0$$. The input impedance $${Z_
View Question
The polarization of a wave with electric field vector $$\overrightarrow E = {E_0}\,{e^{j\left( {\omega t - \beta z} \ri
View Question
The time averaged Poynting vector, in W/m2, for a wave with $$\vec E = 24{e^{j\left( {\omega t + \beta z} \right)}}{\mke
View Question
A plane wave with $$\overrightarrow E = 10\,{e^{j\left( {\omega t - \beta z} \right)\,}}\,\,{\overrightarrow a _{_y}}$$
View Question
The electric field vector of a wave is given as $$$\vec E = {E_0}{\mkern 1mu} {e^{j\left( {\omega t + 3x - 4y} \right)}
View Question
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
View Question
The radiation resistance of a circular loop of one turn is 0.01 $$\Omega $$. The radiation resistance of five turns of s
View Question
The far field of an antenna varies with distance r as
View Question
The vector $$\mathop H\limits^ \to $$ in the far field of an antenna satisfiels
View Question
A rectangular waveguide with inner dimensions 6 cm $$ \times $$ 3 cm has been designed for a single mode operation. Find
View Question
The region between a pair of parallel perfectly conducting planes of infinite extent in the y and z directions is partia
View Question
For small signal a.c. operation, a practical forward biased diode can be modeled as
View Question
The static characteristic of an adequately forward biased p-n junction is a straight line, if the plot is of
View Question
The eigen values of the matrix $$A = \left[ {\matrix{ 0 & 1 \cr 1 & 0 \cr } } \right]$$ are
View Question
If $$\,\,\,L\,\,\left\{ {f\left( t \right)} \right\} = {w \over {{s^2} + {w^2}}}$$ then the value of $$\mathop {Lim}\li
View Question
An I/O processor control the flow of information between
View Question
An instruction used to set the carry flag in a computer can be classified as
View Question
The Nodal method of circuit analysis is based on
View Question
The voltage across the terminals a and b in Fig. is
View Question
Superposition theorem is NOT applicable to networks containing
View Question
A voltage source of internal impedance $${\mathrm R}_\mathrm s\;+\;{\mathrm{jX}}_\mathrm s$$ supplies power to a load of
View Question
The short-circuit admittance matrix of a two-port network is $$$\begin{bmatrix}0&-\frac12\\\frac12&0\end{bmatrix
View Question
A network has 7 nodes and 5 independent loops. The number of branches in the network is
View Question
The parallel $$RLC$$ circuit shown in figure is in resonance. In this circuit
View Question
Determine the frequency of resonance and the resonant impedance of the parallel circuit shown in figure. What happens wh
View Question
The trigonometric Fourier series of a periodic time function can have only
View Question
The amplitude spectrum of a Gaussian pulse is
View Question
The Fourier transform of a voltage of a voltage signal x(t) is X(f). The unit of |X(f)| is
View Question
The Fourier transform of a function x(t) is X(f). The Fourier transform of $${{dx(t)} \over {dt}}$$ will be
View Question
If L$$\left[ {f\left( t \right)} \right]$$ = $$\omega /\left( {{s^2} + {\omega ^2}} \right),$$ then the value of $$\matr
View Question
The z - transform of the time function $$\sum\limits_{k = 0}^\infty {\delta \left( {n - k} \right)} $$ is
View Question
The transfer function of a zero - order - hold system is
View Question
The unit impulse response of a linear time invariant system is the unit step function u(t). For t>0, the response of
View Question
Consider a rectangular pulse g(t) existing between $$t = \, - {T \over 2}\,and\,{T \over 2}$$. Find and sketch the pulse
View Question
Flat top sampling of low pass signals
View Question
The ACF of a rectangular pulse of duration T is
View Question
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12