GATE ECE 1994

## GATE ECE

In order to reduce the harmonic distortion in an amplifier, its dynamic range has
to be _________

View Question A common emitter transistor amplifier has a collector current of 1.0 mA when its
base current is 25 $$\mu$$A at the r

View Question The transit time of a current carriers through the channel of an FET decides its ____________characteristics.

View Question In the MOSFET amplifier shown in the fig. below, the transistor has $$\mu \,\, = \,\,50,\,\,{r_d}\,\, = \,\,10\,K\Omega

View Question The frequency compensation is used in OP-Amps to increase its___________

View Question Match the following.
GROUP-1
(A) Hartley
(B) Wein-bridge
(C) Crystal
GROUP-2
(1) Low frequency oscillator
(2) High freq

View Question A class-A transformer coupled, transistor power Amplifier is required to deliver a power rating of the transistor shoul

View Question Find the output voltage of the following circuit assuming ideal op-amp behavior.

View Question $$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

View Question The bandwidth required for the transmission of a PCM signal increases by a factor of ________ when the number of quanti

View Question Tachometer feedback in a d.c. position control system enhances stability.

View Question The poles of a continuous time oscillator are ___________.

View Question If the open loop transfer function is a ratio of a numerator polynomial of degree
'm' and a denominator polynomial

View Question Reduce the signal flow graph shown in fig. below, to obtain another graph which does not contain the node e5.Also, remov

View Question The response of an LCR circuit to a step input is
(a) Over damped
(b) Critically damped
(c) Oscillatory
If the transfer

View Question Match the following with List-1 with List-2
List-1
(a) Very low response at very high frequencies.
(b) Overshoot
(c) Sy

View Question If G(s) is a stable transfer function, then $$F\left(s\right)=\frac1{G\left(s\right)}$$ is always a stable transfer
func

View Question The 3-dB bandwidth of a typical second- order system with the transfer function
$${{C\left( s \right)} \over {R(s)}} = {

View Question The open loop frequency response of a system at two particular frequencies are given by: 1.2 $$\angle - 180^\circ $$ a

View Question A ring oscillator consisting of 5 inverters is running at a frequency of 1.0 MH$$_z$$. The progagation delay per gate is

View Question 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

View Question Synchronous counters are _____ than the ripple counters.

View Question A PLA can be used

View Question A dynamic RAM consists of

View Question In the output stage of a standard TTL, we have a diode between the emitter of the pull up transistor and the collector o

View Question Match the List-1 (type of 8-bit ADC) with List-2(Minimum conversion time in clock cycles)
List - 1
A. Successive ap

View Question A load impedance (200 + j0) $$\Omega $$ is to be matched to a 50$$\Omega $$ lossless transmission line by using a quarte

View Question A plane electromagnetic wave traveling along the +z-direction, has its electric field given by Ex = 2 cos $$\left( {\ome

View Question 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

View Question A wave traveling in the $$+Z$$-direction, is the resultant of two linearly polarized components, $${E_x}\,\,\, = \,\,\,\

View Question The interior of a $${{20} \over 3}\,\,cm\,\, \times \,\,{{20} \over 4}\,\,cm$$ rectangular waveguide is completely fille

View Question A rectangular hollow metal waveguide of internal cross-section of $$7.366\,\,cm\,\, \times \,\,3.556\,cm$$ carries a 3 G

View Question Two spacecrafts are separated by 3000 km. Each has a paraboloidal reflector antenna of 0.85 m diameter operating at a fr

View Question For a dipole antenna

View Question A p-type silicon sample has a higher conductivity compared to an n-type sample
having the same dopant concentration.

View Question A small concentration of minority carries is injected into a homogeneous
semiconductor crystal at one point. An ele

View Question Channel current is reduced on application of a more positive voltage to the gate
of a depletion mode n-channel MOSFET.

View Question The transit time of the current carriers through the channel of an FET decides
its ____________characteristics.

View Question The threshold voltage of an n-channel MOSFET can be increased by

View Question The following system of equations
$${{x_1} + {x_2} + {x_3} = 3}$$
$${{x_1} - {x_3} = 0}$$
$${{x_1} - {x_2} + {x_3} = 1}

View Question The rank of $$\left( {m \times n} \right)$$ matrix $$\left( {m < n} \right)$$ cannot be more then

View Question The function $$y = {x^2} + {{250} \over x}$$ at $$x=5$$ attains

View Question $$y = {e^{ - 2x}}$$ is a solution of the differential equation $$\,{y^{11}} + {y^1} - 2y = 0$$

View Question Match each of the items $$A, B, C$$ with an appropriate item from $$1, 2, 3, 4$$ and $$5$$
List-$${\rm I}$$
$$(P)$$ $${a

View Question Write down the sequence of Instructions which are actually (till HLT instruction), if the program begins with the locati

View Question A generator of internal impedance, ZG, delivers maximum power to a load impedance, ZL, only if ZL = ................

View Question A ramp voltage, v(t) = 100 t Volts, is applied to an RC differentiating circuit with R = $$5k\Omega$$ and C = $$4\mu F$$

View Question The condition, that a 2-port network is reciprocal, can be expressed in terms of its ABCD parameters as ...............

View Question Write down the mesh equation of the following network in terms of i1(t) and i2(t).Derive the differential equation for i

View Question The circuit shown in the figure, is initially in its steady state. Switch is opened at
t = 0.
(1) Determine the initial

View Question A series LCR circuit consisting of $$R = 10\Omega $$, $$\left| {{X_L}} \right|\,\,\, = 20\Omega $$ and $$\left| {{X_C}}

View Question Calculate the frequency at which zero- transmission is obtained from the Wien- bridge shown in Fig.

View Question Assuming that the amplifier shown in the Fig., below, is a voltage-controlled voltage source, show that the voltage tran

View Question The Fourier Series of an odd periodic function, contains only

View Question The laplace transform of a unit ramp function starting at t=a, is

View Question Indicate whether the following statement is TRUE/FALSE: Give reason for your answer.
If G(s) is a stable transfer func

View Question 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

View Question Increased pulse-width in the flat-top sampling, leads to

View Question 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

View Question