GATE ECE 1993

## GATE ECE

The bandwidth of an n-stage tuned amplifier, with each stage having a band
width of B, is given by

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For the amplifier circuit of figure, the transistor has a $$\mathrm\beta$$ of 800. The mid-band voltage
gain $$V_0/V_1$$

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In a multi-stage RC-Coupled Amplifier the coupling capacitor.

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Negative feedback in Amplifiers.

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In a transistor push-pull Amplifier

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For the ideal Op-Amp circuit of fig. Determine the output voltage V0

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Find the output voltage, V0 in the following circuit assuming that the Op-Amps are ideal.

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Which of the following demodulator(s) can be used for demodulating the signal
$$x(t)\;=\;5\left(1+2\;\cos200\mathrm{πt}\

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A superheterodyne radio receiver with an intermediate frequency of 455 KHz is
tuned to a station operating at 1200 KHz.

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If $$s^3+\;3s^2\;+\;4s\;+A\;=\;0$$ ,then all the roots of this equation are in the left half plane
provided that

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2’s complement representation of a 16-bit number (one sign bit and 15
magnitude bits) is FFFI. Its magnitude in decimal

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Boolean expression for the output of XNOR (equivalence) logic gate with inputs A and B is

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For the logic circuit shown in Figure, the output is equal to

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The truth table for the output Y in terms of three inputs A, B and C are given in
table. Draw a logic circuit realizatio

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Signals A,B,C,D and $$\overline D $$ are available. Using a single 8 - to - 1 multiplexer and no other gate, implement t

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A pulse train with a frequency of 1 MHz is counted using a modulo-1024 ripple-counter built with J-K flip flops. For pro

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Given,$$\overrightarrow V=x\cos^2y\;\;\widehat{\mathrm i}\;+\;\mathrm x^2\mathrm e^\mathrm z\;\widehat{\mathrm j}\;+\;\m

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A material is described by the following electrical parameters at a frequency of $$10$$ GHz is $$\sigma = {10^6}$$ mho/

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Consider a transmission line of characteristic impedance 50 ohm. Let it be terminated at one end by ( + j50) ohm. The VS

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A plane wave is incident normally on a perfect conductor as shown in Fig. Here $$E_x^i,\,\,H_y^i$$ and $$\overrightarrow

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Match the following descriptions with each of the diagrams given in Fig. Fields are near the interface, but on opposite

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Consider an array of two non-directional radiators with spacing $$d\,\, = \,\,0.5\,\,\lambda $$. Determine the direction

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An optical fiber consists of a cylindrical dielectric rod of refractive index $$n_1$$, surrounded by another dielectric

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The built-in potential (Diffusion Potential) in a p-n junction

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If the linear velocity $${\overrightarrow V }$$ is given by $$\overrightarrow V = {x^2}y\overrightarrow i + xyz\overri

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Given the differential equation $${y^1} = x - y$$ with initial condition $$y(0)=0.$$ The value of $$y(0.1)$$ calculated

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In a microcomputer, wait states are used to

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In a microprocessor, the register which holds the address of the next instruction to be fetched is

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A dc circuit shown in figure has a voltage source V, a current source I and several
resistors. A particular resistor R d

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A network contains linear resistors and ideal voltage sources. If values of all the
resistors are doubled, then the volt

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The two electrical sub-network N1 and N2 are connected through three resistors
as shown in figure. The voltage across

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If the secondary winding of the ideal transformer shown in the circuit of the
figure has 40 turns, the number of turns i

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In the series circuit shown in figure, for series resonance, the value of the
coupling coefficient K will be

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In the circuit of figure, when switch S1
is closed, the ideal ammeter M1
reads 5A.
What will be ideal voltmeter M2
rea

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An infinite grid is built up by connecting resistors in the manner indicated in
figure, where each branch represents one

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In the following circuit the capacitance varies as C = KQ, where K is a constant
equal to 0.5 Farads/Coulomb and Q, the

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In figure, A1, A2 and A3 are ideal ammeters. If A1 reads 5 A, A2, A2 reads 12 A, then A3 should read

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If $$F\left( s \right) = L\left[ {f\left( t \right)} \right] = {K \over {\left( {s + 1} \right)\,\left( {{s^2} +

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The Laplace transform of the periodioc function f(t) describe4d by the curve below, i.e.,
$$f\left( t \right) = \left\{

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Consider the following interconnection of the three LTI systems (Fig.1). $${h_1}(t)$$ , $${h_2}(t)$$ and $${h_3}(t)$$ ar

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Sketch the waveform (with properly marked axes) at the output of a matched filter matched for a signal s(t), of duration

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Obtain an expression for the signal in figure, for the signal $${v_3}(t)$$ in Fig for $${v_1}(t) = 100\cos (2000\pi t)

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A low pass signal m(t) band-limited to B Hz is sampled by a periodic rectangular pulse train, $${p_\tau }(t)$$ of period

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