GATE ECE 1994
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GATE ECE

In order to reduce the harmonic distortion in an amplifier, its dynamic range has to be _________
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A common emitter transistor amplifier has a collector current of 1.0 mA when its base current is 25 $$\mu$$A at the r
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The transit time of a current carriers through the channel of an FET decides its ____________characteristics.
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In the MOSFET amplifier shown in the fig. below, the transistor has $$\mu \,\, = \,\,50,\,\,{r_d}\,\, = \,\,10\,K\Omega
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The frequency compensation is used in OP-Amps to increase its___________
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Match the following. GROUP-1 (A) Hartley (B) Wein-bridge (C) Crystal GROUP-2 (1) Low frequency oscillator (2) High freq
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A class-A transformer coupled, transistor power Amplifier is required to deliver a power rating of the transistor shoul
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Find the output voltage of the following circuit assuming ideal op-amp behavior.
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$$v\left(t\right)\;=5\left[\cos\left(10^6\mathrm{πt}\right)\;-\;\sin\left(10^3\mathrm{πt}\right)\times\sin\left(10^6\mat
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The bandwidth required for the transmission of a PCM signal increases by a factor of ________ when the number of quanti
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Tachometer feedback in a d.c. position control system enhances stability.
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The poles of a continuous time oscillator are ___________.
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If the open loop transfer function is a ratio of a numerator polynomial of degree 'm' and a denominator polynomial
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Reduce the signal flow graph shown in fig. below, to obtain another graph which does not contain the node e5.Also, remov
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The response of an LCR circuit to a step input is (a) Over damped (b) Critically damped (c) Oscillatory If the transfer
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Match the following with List-1 with List-2 List-1 (a) Very low response at very high frequencies. (b) Overshoot (c) Sy
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If G(s) is a stable transfer function, then $$F\left(s\right)=\frac1{G\left(s\right)}$$ is always a stable transfer func
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The 3-dB bandwidth of a typical second- order system with the transfer function $${{C\left( s \right)} \over {R(s)}} = {
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The open loop frequency response of a system at two particular frequencies are given by: 1.2 $$\angle - 180^\circ $$ a
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A ring oscillator consisting of 5 inverters is running at a frequency of 1.0 MH$$_z$$. The progagation delay per gate is
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A Boolean function, F , given as sum of product (SOP) terms as F= $$\sum {} $$m(3,4,5,6) with A,B, and C as inputs. The
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Synchronous counters are _____ than the ripple counters.
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A PLA can be used
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A dynamic RAM consists of
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In the output stage of a standard TTL, we have a diode between the emitter of the pull up transistor and the collector o
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Match the List-1 (type of 8-bit ADC) with List-2(Minimum conversion time in clock cycles) List - 1 A. Successive ap
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A load impedance (200 + j0) $$\Omega $$ is to be matched to a 50$$\Omega $$ lossless transmission line by using a quarte
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A plane electromagnetic wave traveling along the +z-direction, has its electric field given by Ex = 2 cos $$\left( {\ome
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If a pure resistance load, when connected to a lossless 75-ohm line, produces a VSWR of 3 on the line, then the load imp
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A wave traveling in the $$+Z$$-direction, is the resultant of two linearly polarized components, $${E_x}\,\,\, = \,\,\,\
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The interior of a $${{20} \over 3}\,\,cm\,\, \times \,\,{{20} \over 4}\,\,cm$$ rectangular waveguide is completely fille
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A rectangular hollow metal waveguide of internal cross-section of $$7.366\,\,cm\,\, \times \,\,3.556\,cm$$ carries a 3 G
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Two spacecrafts are separated by 3000 km. Each has a paraboloidal reflector antenna of 0.85 m diameter operating at a fr
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For a dipole antenna
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A p-type silicon sample has a higher conductivity compared to an n-type sample having the same dopant concentration.
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A small concentration of minority carries is injected into a homogeneous semiconductor crystal at one point. An ele
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Channel current is reduced on application of a more positive voltage to the gate of a depletion mode n-channel MOSFET.
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The transit time of the current carriers through the channel of an FET decides its ____________characteristics.
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The threshold voltage of an n-channel MOSFET can be increased by
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The following system of equations $${{x_1} + {x_2} + {x_3} = 3}$$ $${{x_1} - {x_3} = 0}$$ $${{x_1} - {x_2} + {x_3} = 1}
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The rank of $$\left( {m \times n} \right)$$ matrix $$\left( {m < n} \right)$$ cannot be more then
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The function $$y = {x^2} + {{250} \over x}$$ at $$x=5$$ attains
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$$y = {e^{ - 2x}}$$ is a solution of the differential equation $$\,{y^{11}} + {y^1} - 2y = 0$$
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Match each of the items $$A, B, C$$ with an appropriate item from $$1, 2, 3, 4$$ and $$5$$ List-$${\rm I}$$ $$(P)$$ $${a
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Write down the sequence of Instructions which are actually (till HLT instruction), if the program begins with the locati
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A generator of internal impedance, ZG, delivers maximum power to a load impedance, ZL, only if ZL = ................
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A ramp voltage, v(t) = 100 t Volts, is applied to an RC differentiating circuit with R = $$5k\Omega$$ and C = $$4\mu F$$
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The condition, that a 2-port network is reciprocal, can be expressed in terms of its ABCD parameters as ...............
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Write down the mesh equation of the following network in terms of i1(t) and i2(t).Derive the differential equation for i
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The circuit shown in the figure, is initially in its steady state. Switch is opened at t = 0. (1) Determine the initial
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A series LCR circuit consisting of $$R = 10\Omega $$, $$\left| {{X_L}} \right|\,\,\, = 20\Omega $$ and $$\left| {{X_C}}
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Calculate the frequency at which zero- transmission is obtained from the Wien- bridge shown in Fig.
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Assuming that the amplifier shown in the Fig., below, is a voltage-controlled voltage source, show that the voltage tran
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The Fourier Series of an odd periodic function, contains only
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The laplace transform of a unit ramp function starting at t=a, is
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Indicate whether the following statement is TRUE/FALSE: Give reason for your answer. If G(s) is a stable transfer func
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Match each of the items A, B and C with an appropriate item from 1, 2, 3, 4 and 5. List - 1 (A) $${a_1}{{{d^{2y}}} \ove
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Increased pulse-width in the flat-top sampling, leads to
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A signal, f(t) = $${e^{ - at}}$$ u(t), where u(t) is the unit step function, is applied to the input of a low-pass filte
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