GATE ECE 2009

## GATE ECE

A small signal source Vi(t) = A cos 20t + B sin 106 t, is applied to a transistor Amplifier as shown in fig. The transis

View Question A communication channel with AWGN operating at a signal to noise ratio SNR > > 1 and band width B has capacity $${

View Question The amplitude of random signal is uniformly distributed between $$-$$5V and 5V
If the signal to quantization noise rati

View Question The amplitude of random signal is uniformly distributed between $$-$$5V and 5V
If the positive values of the signal are

View Question The unit step response of an under-damped second order system has steady state value of -2.
Which one of the following t

View Question The Nyquist plot of a stable transfer function G(s) is shown in the figure. We are interested in the stability of the cl

View Question The Nyquist plot of a stable transfer function G(s) is shown in the figure. We are interested in the stability of the cl

View Question The magnitude plot of a rational transfer function G(s), with real coefficient is shown in figure.
Which of the followin

View Question Consider the system $${{dx} \over {dt}} = Ax + Bu$$ with $${\rm A} = \left[ {\matrix{
1 & 0 \cr
0 & 1

View Question If X=1 in the logic equation
$$\left[ {X + Z\left\{ {\overline Y + (\overline Z + X\overline {Y)} } \right\}} \right]$

View Question What are the minimum number of 2-to 1 multiplexers required to generate a 2-input AND gate and a 2-input EX-OR gate?

View Question The full forms of the abbreviations TTL and COMS in reference to logic families are

View Question What are the counting states (Q1, Q2) for the counter shown in the figure below?

View Question Two infinitely long wires carrying current are as shown in the figure below. One wire is in the
y-z plane and parallel t

View Question A transmission line terminates in two branches, each of length $$\lambda /4$$, as shown.The branches are terminated by 5

View Question Which of the following statements is true regarding the fundamental mode of the metallic waveguides shown?

View Question In the circuit below, the diode is ideal. The voltage V is given by

View Question Consider the CMOS circuit shown, where the gate voltage of the n-MOSFET is increased
from zero, while the gate voltage o

View Question Consider the CMOS circuit shown, where the gate voltage of the n-MOSFET is increased
from zero, while the gate voltage o

View Question The eigen values of the following matrix $$\left[ {\matrix{
{ - 1} & 3 & 5 \cr
{ - 3} & { - 1} &

View Question The Taylor series expansion of $$\,\,{{\sin x} \over {x - \pi }}\,\,$$ at $$x = \pi $$ is given by

View Question If a vector field$$\overrightarrow V $$ is related to another field $$\overrightarrow A $$ through $$\,\overrightarrow

View Question A fair coin is tossed $$10$$ times. What is the probability that only the first two tosses will yield heads?

View Question Consider two independent random variables $$X$$ and $$Y$$ with identical distributions. The variables $$X$$ and $$Y$$ ta

View Question A discrete random variable $$X$$ takes value from $$1$$ to $$5$$ with probabilities as shown in the table. A student cal

View Question Match each differential equation in Group $$I$$ to its family of solution curves from Group $$II.$$
Group $$I$$
$$P:$

View Question The order of differential equation $$\,\,{{{d^2}y} \over {d{t^2}}} + {\left( {{{dy} \over {dx}}} \right)^3} + {y^4} = {e

View Question Given that $$F(s)$$ is the one-sided Laplace transform of $$f(t),$$ the Laplace transform of $$\int\limits_0^t {f\left(

View Question If $$f\left( z \right) = {C_0} + {C_1}{z^{ - 1}}\,\,$$ then $$\oint\limits_{|z| = 1} {{{1 + f\left( z \right)} \over z}}

View Question In the interconnection of ideal sources shown in the figure, it is known that the 60V source is absorbing power.
Which

View Question In the circuit shown, what value of RL maximizes the power delivered to RL?

View Question The switch in the circuit shown was on position ‘a’ for a long time and is moved to position ‘b’
at time t = 0. The curr

View Question The time domain behavior of an RL circuit is represented by
$$$\mathrm L\frac{\mathrm{di}\left(\mathrm t\right)}{\mathrm

View Question A fully charged mobile phone with a 12 V battery is good for a 10 minute talk-time. Assume that, during the talk-time, t

View Question An AC source of RMS voltage $$20$$ $$V$$ with internal impedance $${Z_s} = \left( {1 + 2j} \right)\Omega $$ feeds a loa

View Question If the transfer function of the following network is $$\,{{{V_0}(s)} \over {{V_i}(s)}} = {1 \over {2\, + \,sCR}}$$
The

View Question The Fourier series of a real periodic function has only
P. Cosine terms if it is even
Q. Sine terms if it is even
R. Cos

View Question A function is given by f(t) = sin2t +cos2t . Which of the following is true?

View Question Given that F(s) is the one-sided Laplace transform of f(t), the Laplace transform of $$\int\limits_0^t {f\left( \tau \r

View Question The 4-point Discrete Fourier Transform (DFT) of a discrete time sequence $$\left\{ {1,\,0,\,2,\,3} \right\}$$ is

View Question The ROC of Z-transform of the discrete time sequence
x(n)= $${\left( {{1 \over 3}} \right)^{n}}u(n) - {\left( {{1 \over

View Question Consider a system whose input x and output y are related by the equation
$$$y(t) = \int\limits_{ - \infty }^\infty {x(

View Question A system with transfer function H(z) has impulse response h(.) defined as h(2) = 1, h(3) = - 1 and h (k) = 0 otherwise.

View Question An LTI system having transfer function $${{{s^2} + 1} \over {{s^2} + 2s + 1}}$$ and input x(t) = sin (t + 1) is in stead

View Question