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2602
GATE ECE 1997 | Question 5.6
Negative feedback in (1) Voltage series configuration increase input impedance (2) Current shunt configuration decrease input impedance increases closed loop gain leads to oscillation
Negative feedback in(1) Voltage series configurationincrease input impedance(2) Current shunt configurationdecrease input impedanceincreases closed loop gainleads to osci...
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2604
GATE ECE 1997 | Question 21
In the figure is a linear time invariant discrete systme is shown. Blocks labelled $D$ represent unit delay elements. For $n<0$, you may assume that $x$ (n), $y_{1}(n), y_{2}(n)$ are all zero. Find the expression for $y_{1}(n)$ and $y_{2}(n)$ ... $y_{2}(n)$
In the figure is a linear time invariant discrete systme is shown. Blocks labelled $D$ represent unit delay elements. For $n<0$, you may assume that $x$ (n), $y_{1}(n), y...
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2605
GATE ECE 2000 | Question 13
The figure shows a common base amplifier. (a) Write expressions for the time-constants associated with the capacitors, $C_{B}$ and $C_{S}$. (b) What is the approximate lower cut-off frequency of the amplifier?
The figure shows a common base amplifier.(a) Write expressions for the time-constants associated with the capacitors, $C_{B}$ and $C_{S}$.(b) What is the approximate lowe...
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2606
GATE ECE 2002 | Question: 2.22
A plane wave is characterized by $\overline{\mathrm{E}}=\left(0.5 \hat{x}+\hat{y} e^{jz} / 2 \right)e^{jzet – jkz}.$ This wave is linearly polarized circularly polarized elliptically polarized unpolarized
A plane wave is characterized by $\overline{\mathrm{E}}=\left(0.5 \hat{x}+\hat{y} e^{jz} / 2 \right)e^{jzet – jkz}.$ This wave islinearly polarizedcircularly polarizede...
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2609
GATE ECE 2003 | Question: 85
If the electric field intensity is given by \[\mathrm{E}=\left(x u_{x}+y u_{y}+z u_{z}\right) \text { volt } / \mathrm{m} \text {, }\] the potential difference between $X(2,0,0)$ and $Y(1,2,3)$ is $+1$ volt $-1$ volt $+5$ volt $+6$ volt
If the electric field intensity is given by\[\mathrm{E}=\left(x u_{x}+y u_{y}+z u_{z}\right) \text { volt } / \mathrm{m} \text {, }\]the potential difference between $X(2...
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2613
GATE ECE 2005 | Question: 47
The voltage $e_{0}$ indicated in the figure has been measured by an ideal voltmeter. Which of the following can be calculated? Bias current of the inverting input only Bias current of the inverting and non-inverting inputs only Input offset current only Both the bias currents and the input offset current.
The voltage $e_{0}$ indicated in the figure has been measured by an ideal voltmeter. Which of the following can be calculated?Bias current of the inverting input onlyBias...
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2615
GATE ECE 2005 | Question: 56
The present output $Q_{n}$ of an edge triggered JK flip-flop is logic $0.$ If $\mathrm{J}=1$, then $\mathrm{Q}_{n+1}$ cannot be determined will be logic $0$ will be logic $1$ will race around
The present output $Q_{n}$ of an edge triggered JK flip-flop is logic $0.$ If $\mathrm{J}=1$, then $\mathrm{Q}_{n+1}$cannot be determinedwill be logic $0$will be logic $1...
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2616
GATE ECE 1995 | Question 1.42
The signal to quantisation noise ratio in an $n$-bit $\text{PCM}$ system depends upon the sampling frequency employed is independent of the value of ' $n$ ' increases with increasing value of ' $n$ ' decreases with the increasing value of ' $n$ '
The signal to quantisation noise ratio in an $n$-bit $\text{PCM}$ systemdepends upon the sampling frequency employedis independent of the value of ' $n$ 'increases with i...
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2617
GATE ECE 2007 | Question: 52
A control system with a $\text{PD}$ controller is shown in the figure. If the velocity error constant $K_{v}=1000$ and the damping ratio $\zeta=0.5$, then the values of $K_{P}$ and $K_{D}$ are $K_{P}=100, K_{D}=0.09$ $K_{P}=100, K_{D}=0.9$ $K_{P}=10, K_{D}=0.09$ $K_{P}=10, K_{D}=0.9$
A control system with a $\text{PD}$ controller is shown in the figure. If the velocity error constant $K_{v}=1000$ and the damping ratio $\zeta=0.5$, then the values of $...
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2618
GATE ECE 2007 | Question: 76
Consider the Op-Amp circuit shown in the figure. The transfer function $V_{o}(s) / V_{i}(s)$ is $\frac{1-s R C}{1+s R C}$ $\frac{1+s R C}{1-s R C}$ $\frac{1}{1-s R C}$ $\frac{1}{1+s R C}$
Consider the Op-Amp circuit shown in the figure.The transfer function $V_{o}(s) / V_{i}(s)$ is$\frac{1-s R C}{1+s R C}$$\frac{1+s R C}{1-s R C}$$\frac{1}{1-s R C}$$\frac{...
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2619
GATE ECE 2009 | Question: 35
A small signal source $v_{i}(t)=A \cos 20 t+B \sin 10^{6} t$ is applied to a transistor amplifier as shown below. The transistor has $\beta=150$ and $h_{i e}=3 \; \mathrm{k} \Omega$. Which expression best approximates $v_{o}(t)$ ... $v_{o}(t)=-1500 B \sin 10^{6} t$ $v_{o}(t)=-150 B \sin 10^{6} t$
A small signal source $v_{i}(t)=A \cos 20 t+B \sin 10^{6} t$ is applied to a transistor amplifier as shown below. The transistor has $\beta=150$ and $h_{i e}=3 \; \mathrm...
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2621
GATE ECE 2010 | Question: 24
Consider the pulse shape $s(t)$ as shown. The impulse response $h(t)$ of the filter matched to this pulse is ​​​​​​​
Consider the pulse shape $s(t)$ as shown. The impulse response $h(t)$ of the filter matched to this pulse is ​​​​​​​
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2622
GATE ECE 2010 | Question: 54
Statement for Linked Answer Questions 54 and 55: Consider a baseband binary PAM receiver shown below. The additive channel noise $n(t)$ is white with power spectral density $S_{N}(f)=N_{0} / 2=10^{-20}$ ... $V^{-1}$ ) is $10^{10}$ $10^{}$ $1.414 \times 10^{-10}$ $2 \times 10^{20}$
Statement for Linked Answer Questions 54 and 55:Consider a baseband binary PAM receiver shown below. The additive channel noise $n(t)$ is white with power spectral densit...
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2625
GATE ECE 1998 | Question 8
The characteristic equation of a feedback control system is \[s^{4}+20 s^{3}+15 s^{2}+2 s+K=0\] Determine the range of $K$ for the system to be stable. Can the system be marginally stable? If so, find the required value of $K$ and the frequency of sustained oscillation.
The characteristic equation of a feedback control system is\[s^{4}+20 s^{3}+15 s^{2}+2 s+K=0\]Determine the range of $K$ for the system to be stable.Can the system be mar...
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2626
GATE ECE 2003 | Question: 75
The data for Q. 75-76 are given below. Solve the problems and choose the correct answers. Let $m(t)=\cos \left[\left(4 \pi \times 10^{3}\right) t\right]$ be the message signal and $\left.c(t)=5 \cos \left[2 \pi \times 10^{b}\right) t\right]$ ... $\frac{1}{2}$ $\frac{1}{4}$ $\frac{1}{3}$ $\frac{1}{8}$
The data for Q. 75-76 are given below. Solve the problems and choose the correct answers.Let $m(t)=\cos \left[\left(4 \pi \times 10^{3}\right) t\right]$ be the message si...
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2628
GATE ECE 1995 | Question 1.27
To obtain very high input and output impedances in a feedback amplifier, the topolomostly used is voltage-series current-series voltage-shunt current-shunt
To obtain very high input and output impedances in a feedback amplifier, the topolomostly used isvoltage-seriescurrent-seriesvoltage-shuntcurrent-shunt
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2630
GATE ECE 2006 | Question: 51
The minimum sampling frequency (in samples/sec) required to reconstruct the following signal from its samples without distortion \[ x(t)=5\left(\frac{\sin 2 \pi 1000 t}{\pi t}\right)^{3}+7\left(\frac{\sin 2 \pi 1000 t}{\pi t}\right)^{2} \] would be $2 \times 10^{3}$ $4 \times 10^{3}$ $6 \times 10^{3}$ $8 \times 10^{3}$
The minimum sampling frequency (in samples/sec) required to reconstruct the following signal from its samples without distortion\[ x(t)=5\left(\frac{\sin 2 \pi 1000 t}{\p...
1 votes
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2633
GATE ECE 2010 | Question: 7
Thin gate oxide in a $\text{CMOS}$ process is preferably grown using wet oxidation dry oxidation epitaxial deposition ion implantation
Thin gate oxide in a $\text{CMOS}$ process is preferably grown usingwet oxidationdry oxidationepitaxial depositionion implantation
1 votes
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2634
GATE ECE 2010 | Question: 26
If $e^{y}=x^{\frac{1}{x}}$, then $y$ has a maximum at $x=e$ minimum at $x=e$ maximum at $x=e^{-1}$ minimum at $x=e^{-1}$
If $e^{y}=x^{\frac{1}{x}}$, then $y$ has amaximum at $x=e$minimum at $x=e$maximum at $x=e^{-1}$minimum at $x=e^{-1}$
1 votes
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2635
GATE ECE 2010 | Question: 29
The residues of a complex function $X(z)=\dfrac{1-2 z}{z(z-1)(z-2)}$ at its poles are $\frac{1}{2},-\frac{1}{2}$ and $1$ $\frac{1}{2}, \frac{1}{2}$ and $-1$ $\frac{1}{2}, 1$ and $-\frac{3}{2}$ $\frac{1}{2},-1$ and $\frac{3}{2}$
The residues of a complex function $X(z)=\dfrac{1-2 z}{z(z-1)(z-2)}$ at its poles are$\frac{1}{2},-\frac{1}{2}$ and $1$$\frac{1}{2}, \frac{1}{2}$ and $-1$$\frac{1}{2}, 1$...
1 votes
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2636
GATE ECE 2010 | Question: 48
Consider the common emitter amplifier shown below with the following circuit parameters: ... The resistance seen by the source $\nu_{s}$ is $258 \; \Omega$ $1258 \; \Omega$ $93 \; \mathrm{k} \Omega$ $\infty$
Consider the common emitter amplifier shown below with the following circuit parameters: $\beta=100, g_{m}=0.3861 \mathrm{~A / V}, \mathrm{r}_{\mathrm{o}}=\infty, \mathrm...
1 votes
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2637
GATE ECE 2011 | Question: 47
A numerical solution of the equation $f(x)=x+\sqrt{x}-3=0$ can be obtained using Newton-Raphson method. If the starting value is $x=2$ for the iteration, the value of $x$ that is to be used in the next step is $0.306$ $0.739$ $1.694$ $2.306$
A numerical solution of the equation $f(x)=x+\sqrt{x}-3=0$ can be obtained using Newton-Raphson method. If the starting value is $x=2$ for the iteration, the value of $x$...
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