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241
GATE ECE 1997 | Question 25
A block diagram of a system is shown in the figure is draw the spectrum of the output signal with relative aptitudes of the frequencies.
A block diagram of a system is shown in the figure is draw the spectrum of the output signal with relative aptitudes of the frequencies.
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244
GATE ECE 1997 | Question 19
An $\text{IC}$ $555$ ... for the configuration chosen. If necessary you can suggest modification in the external circuit configuration.
An $\text{IC}$ $555$ chip has been used to construct a pulse-Generator. Typical pin connections with components is shown below in the figure is for such an application. H...
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245
GATE ECE 1997 | Question 14
A sequence generator is shown in the figure is The counter status $\left(\mathrm{Q}_{0^{\prime}}, \mathrm{Q}_{1}, \mathrm{Q}_{2}\right)$ is initialised to $010$ ... rising clock edge. Give the sequence generate at $\mathrm{Q}_{0}$ till it repeats. What is the repetition rate of the generated sequence?
A sequence generator is shown in the figure is The counter status $\left(\mathrm{Q}_{0^{\prime}}, \mathrm{Q}_{1}, \mathrm{Q}_{2}\right)$ is initialised to $010$ using pre...
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246
GATE ECE 2000 | Question 2.13
Let $u(t)$ be the step function. Which of the Waveforms in given figure, $(a)$ - $(d)$ corresponds to the convolution of $u(t)-u(t-1)$ with $u(t)-u(t-2)$ ?
Let $u(t)$ be the step function. Which of the Waveforms in given figure, $(a)$ - $(d)$ corresponds to the convolution of $u(t)-u(t-1)$ with $u(t)-u(t-2)$ ?
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249
GATE ECE 1997 | Question 22
In the circuit of figure when $R=0 \; \Omega$, the current $i_{k}$ equals $10 \mathrm{~A}$ Find the value of $R$ for which it absorbs maximum power Find the value of $\varepsilon$ Find $V_{2}$ when $R=\infty$ (open circuit)
In the circuit of figure when $R=0 \; \Omega$, the current $i_{k}$ equals $10 \mathrm{~A}$Find the value of $R$ for which it absorbs maximum powerFind the value of $\vare...
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252
GATE ECE 2000 | Question 1.10
The configuration of given figure is a precision integrator Hartley oscillator Butterworth high pass filter Wien-bridge oscillator
The configuration of given figure is aprecision integratorHartley oscillatorButterworth high pass filterWien-bridge oscillator
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253
GATE ECE 2000 | Question 2.7
For the logic circuit shown in, the simplified Boolean expression for the output $Y$ is $\mathrm{A}+\mathrm{B}+\mathrm{C}$ $\mathrm{A}$ $\mathrm{B}$ $\mathrm{C}$
For the logic circuit shown in, the simplified Boolean expression for the output $Y$ is$\mathrm{A}+\mathrm{B}+\mathrm{C}$$\mathrm{A}$$\mathrm{B}$$\mathrm{C}$
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254
GATE ECE 2000 | Question 2.2
Use the data of the figure. The current $i$ in the circuit of the figure is $-2 \mathrm{~A}$ $2 \mathrm{~A}$ $-4 \mathrm{~A}$ $+4 \mathrm{~A}$
Use the data of the figure. The current $i$ in the circuit of the figure is$-2 \mathrm{~A}$$2 \mathrm{~A}$$-4 \mathrm{~A}$$+4 \mathrm{~A}$
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255
GATE ECE 1997 | Question 29
A uniform plane wave is normally incident from air on an infinitely thick magnetic material with relative permeability $100$ and relative permittivity $4$ see the figure is. The wave has an electric field of $1 \mathrm{V}$, meter $\text{(rms)}$. Find the average pointing vector inside the material.
A uniform plane wave is normally incident from air on an infinitely thick magnetic material with relative permeability $100$ and relative permittivity $4$ see the figure ...
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258
GATE ECE 2000 | Question 1.4
In the differential amplifer of the figure, if the source resistance of the current source $I_{E E}$ is infinite, then the common-mode gain is zero infinite indeterminate $\frac{\mathrm{V}_{m 1}+\mathrm{V}_{m 2}}{2 \mathrm{V}_{\mathrm{T}}}$
In the differential amplifer of the figure, if the source resistance of the current source $I_{E E}$ is infinite, then the common-mode gain iszeroinfiniteindeterminate$\f...
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259
GATE ECE 2000 | Question 1.21
The magnitudes of the open-circuit and short-circuit input impedance of a transmission line are $100 \; \Omega$ and $25 \; \Omega$ respectively. The characteristic impedance of the line is, $25 \; \Omega$ $50 \; \Omega$ $75 \; \Omega$ $100 \; \Omega$
The magnitudes of the open-circuit and short-circuit input impedance of a transmission line are $100 \; \Omega$ and $25 \; \Omega$ respectively. The characteristic impeda...
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260
GATE ECE 2000 | Question 1.24
If the diameter of a $\frac{\lambda}{2}$ dipole antenna is increased $\operatorname{from} \frac{\lambda}{100}$ to $\frac{\lambda}{50}$, then its bandwidth increases bandwidth decreases gain increases gain decreases
If the diameter of a $\frac{\lambda}{2}$ dipole antenna is increased $\operatorname{from} \frac{\lambda}{100}$ to $\frac{\lambda}{50}$, then itsbandwidth increasesbandwid...
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261
GATE ECE 1997 | Question 20
An $8085 \; \mu \mathrm{P}$ uses a $2 \; \mathrm{MHz}$ ... used above take $(3 n+1)$ clock cycles, where $n$ is the number of accesses to the memory, inclusive of the opcode fetch.
An $8085 \; \mu \mathrm{P}$ uses a $2 \; \mathrm{MHz}$ crystal. Find the time taken by it to execute the following delay subroutine, inclusive of the call instruction in ...
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262
GATE ECE 2000 | Question 1.25
The circuit of the figure represents a low pass filter high pass filter band pass filter band reject filter
The circuit of the figure represents alow pass filterhigh pass filterband pass filterband reject filter
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267
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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268
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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269
GATE ECE 1997 | Question 5.3
(1) An $8$-bit wide $5$ word sequential memory will have $8$ Fixed $\text{‘AND'}$ gates and $4$ programmable $\text{‘OR'}$ gates (2) A $256 \times 4$ $\text{EFROM}$ has Eight $4$ bit shift registers $4$ words of $32$ bits each $8$ address pins and $4$ data pins output
(1) An $8$-bit wide $5$ word sequential memory will have$8$ Fixed $\text{‘AND'}$ gates and $4$ programmable $\text{‘OR'}$ gates(2) A $256 \times 4$ $\text{EFROM}$ has...
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271
GATE ECE 1997 | Question 5.2
If the Fourier Transform of deterministic signal $\mathrm{g}(\mathrm{t})$ is $\mathrm{G}(f)$, then (1) The Fourier Transform of $g(t-2)$ is $G(f) e^{-j(4 \pi f)}$ (2) The Fourier Transform of $g(t / 2)$ is $G(2 f)$ $2 G(2 f)$ $G(f-2)$
If the Fourier Transform of deterministic signal $\mathrm{g}(\mathrm{t})$ is $\mathrm{G}(f)$, then(1) The Fourier Transform of $g(t-2)$ is$G(f) e^{-j(4 \pi f)}$(2) The Fo...
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273
GATE ECE 1997 | Question 5.5
While moving data between registers of the $8085$ and the stack (1) a $\text{PUSH}$ instruction Pre increments the stack pointer (2) a $\text{POP}$ instruction Post increments the stack pointer Pre decrements the stack pointer Post decrements the stack pointer
While moving data between registers of the $8085$ and the stack(1) a $\text{PUSH}$ instructionPre increments the stack pointer(2) a $\text{POP}$ instructionPost increment...
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274
GATE ECE 1997 | Question 5.1
In the case of a linear time invariant system (1) Poles in the right half plane implies Exponential decay of output (2) Impulse response zero for $t \leq 0$ implies System is casual No stored energy in the system System is unstable.
In the case of a linear time invariant system(1) Poles in the right half plane implies Exponential decay of output(2) Impulse response zero for $t \leq 0$ impliesSystem i...
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275
GATE ECE 2000 | Question 1.19
For the logic circuit shown in the figure is the required input condition $(A, B, C)$ to make the output $(X)=1$ is $1,0,1$ $0,0,1$ $1,1,1$ $0,1,1$
For the logic circuit shown in the figure is the required input condition $(A, B, C)$ to make the output $(X)=1$ is$1,0,1$$0,0,1$$1,1,1$$0,1,1$
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276
GATE ECE 1997 | Question 17
For a typical $n-p-n$ transistor, as shown in the figure we have the following data available $\mathrm{W}_{\mathrm{C}}=20 \mu \mathrm{m}$ and Collcetor doping $=5 \times 10^{18} / \mathrm{cc}$ $\mathrm{W}_{\mathrm{E}}=1 \mu \mathrm{m}$ ...
For a typical $n-p-n$ transistor, as shown in the figure we have the following data available$\mathrm{W}_{\mathrm{C}}=20 \mu \mathrm{m}$ and Collcetor doping $=5 \times 1...
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277
GATE ECE 1997 | Question 4.10
The boolean function $\mathrm{A}+\mathrm{BC}$ is a reduced form of $\mathrm{AB}+\mathrm{BC}$ $(\mathrm{A}+\mathrm{B}) \cdot(\mathrm{A}+\mathrm{C})$ $\overline{\mathrm{A}} \mathrm{B}+\mathrm{A} \overline{\mathrm{B}} \mathrm{C}$ $(\mathrm{A}+\mathrm{C}) \cdot \mathrm{B}$
The boolean function $\mathrm{A}+\mathrm{BC}$ is a reduced form of$\mathrm{AB}+\mathrm{BC}$$(\mathrm{A}+\mathrm{B}) \cdot(\mathrm{A}+\mathrm{C})$$\overline{\mathrm{A}} \m...
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278
GATE ECE 2000 | Question 1.12
The Fourier Transform of the signal $x(t)=\mathrm{e}^{-3 \mathrm{t}^{2}}$ is of the following form, where $A$ and $B$ are constants $\mathrm{A} e^{-\mathrm{B}|f|}$ $\mathrm{A} e^{-\mathrm{B} f}$ $\mathrm{A}+\mathrm{B}|f|^{2}$ $\mathrm{A} e^{-B f}$
The Fourier Transform of the signal $x(t)=\mathrm{e}^{-3 \mathrm{t}^{2}}$ is of the following form, where $A$ and $B$ are constants$\mathrm{A} e^{-\mathrm{B}|f|}$$\mathrm...
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