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Recent questions tagged nyquist
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GATE ECE 2016 Set 3  Question: 6
Consider the signal $x(t) = \cos(6\pi t) + \sin (8\pi t)$, where $t$ is in seconds. The Nyquist sampling rate (in samples/second) for the signal $y(t) = x(2t + 5)$ is $8$ $12$ $16$ $32$
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Mar 28, 2018
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Control Systems
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Milicevic3306
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gate2016ec3
controlsystems
nyquist
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2
GATE ECE 2016 Set 3  Question: 22
An analog baseband signal, bandlimited to $100\ Hz$, is sampled at the Nyquist rate. The samples are quantized into four message symbols that occur independently with probabilities $p_1 = p_4 = 0.125$ and $p_2 = p_3$. The information rate (bits/sec) of the message source is _______
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Mar 28, 2018
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Control Systems
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Milicevic3306
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20
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gate2016ec3
numericalanswers
controlsystems
nyquist
probability
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3
GATE ECE 2016 Set 2  Question: 20
The number and direction of encirclements around the point $1+j0$ in the complex plane by the Nyquist plot of $G(s)=\frac{1s}{4+2s}$ is zero. one,anticlockwise. one, clockwise. two, clockwise.
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Mar 28, 2018
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Control Systems
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Milicevic3306
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14
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gate2016ec2
controlsystems
nyquist
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4
GATE ECE 2016 Set 1  Question: 20
A closedloop control system is stable if the Nyquist plot of the corresponding openloop transfer function encircles the $s$plane point $(1+j0)$ in the counter clockwise direction as many times as the number of righthalf $s$plane poles. ... plane point $(1+j0)$ in the counterclockwise direction as many times as the number of righthalf $s$plane zeroes.
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Mar 28, 2018
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Control Systems
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Milicevic3306
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22
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gate2016ec1
controlsystems
nyquist
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5
GATE ECE 2015 Set 3  Question: 45
Consider a continuoustime signal defined as $x(t)=\left(\dfrac{\sin(\pi t/2)}{(\pi t /2)}\right)\ast \sum _{n=\infty}^{\infty}\delta(t10n)$ where $’\ast’$ denotes the convolution operation and $t$ is in seconds. The Nyquist sampling rate $\text{(in samples/sec)}$ for $x(t)$ is _______.
asked
Mar 28, 2018
in
Continuoustime Signals
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Milicevic3306
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25
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gate2015ec3
numericalanswers
continuoustimesignals
convolution
nyquist
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6
GATE ECE 2014 Set 1  Question: 18
Consider two real valued signals, $x(t)$ bandlimited to $[500\:Hz,500\:Hz]$ and $y(t)$ bandlimited to $[1\:kHz,1\:kHz].$ For $z(t) = x(t)\cdot y(t),$ the Nyquist sampling frequency (in $kHz$) is _______.
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Mar 26, 2018
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Control Systems
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Milicevic3306
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15.8k
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29
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gate2014ec1
numericalanswers
nyquist
controlsystems
0
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7
GATE ECE 2014 Set 1  Question: 21
Consider the feedback system shown in the figure. The Nyquist plot of $G(s)$ is also shown. Which one of the following conclusions is correct? $G(s)$ is an allpass filter $G(s)$ is a strictly proper transfer function $G(s)$ is a stable and minimumphase transfer function The closedloop system is unstable for sufficiently large and positive $k$
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Mar 26, 2018
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Control Systems
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Milicevic3306
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21
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gate2014ec1
controlsystems
nyquist
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1
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8
GATE ECE 2018  Question: 5
The Nyquist stability criterion and the Routh criterion both are powerful analysis tools for determining the stability od feedback controllers. Identify which of the following statements is FALSE: Both the criteria provide information relative to the ... criterion. The closedloop frequency response for a unity feedback system cannot be obtained from the Nyquist plot.
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Feb 19, 2018
in
Control Systems
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gatecse
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92
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gate2018ec
controlsystems
nyquist
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9
GATE ECE 2017 Set 2  Question: 48
A unity feedback control system is characterized by the openloop transfer function $G(s)=\frac{10K(s+2)}{s^3+3s^2+10}$ The Nyquist path and the corresponding Nyquist plot of $G(s)$ are shown in the figures below. If $0 < K < 1$, then the number of poles of the closedloop transfer function that lie in the righthalf of the $s$plane is $0$ $1$ $2$ $3$
asked
Nov 25, 2017
in
Control Systems
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admin
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2.8k
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92
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gate2017ec2
controlsystems
nyquist
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0
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10
GATE ECE 2017 Set 1  Question: 49
The Nyquist plot of the transfer function $G(s)=\frac{K}{(s^{2}+2s+2)(s+2)}$ does not encircle the point $(1+j0)$ for $K=10$ but does encircle the point $(1+j0)$ for $K=100$. Then the closed loop system (having unity gain feedback) is stable ... $K=10$ and unstable for $K=100$ unstable for $K=10$ and stable for $K=100$ stable for $K=10$ and unstable for $K=100$
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Nov 17, 2017
in
Control Systems
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admin
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2.8k
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45
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gate2017ec1
nyquist
controlsystems
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