GATE ECE 1993
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## GATE ECE

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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The bandwidth of an n-stage tuned amplifier, with each stage having a band width of B, is given by
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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 $$x(t)\;=\;5\left(1+2\;\cos200\mathrm{πt}\ View Question A superheterodyne radio receiver with an intermediate frequency of 455 KHz is tuned to a station operating at 1200 KHz. View Question If$$s^3+\;3s^2\;+\;4s\;+A\;=\;0$$,then all the roots of this equation are in the left half plane provided that View Question 2’s complement representation of a 16-bit number (one sign bit and 15 magnitude bits) is FFFI. Its magnitude in decimal View Question For the logic circuit shown in Figure, the output is equal to View Question Boolean expression for the output of XNOR (equivalence) logic gate with inputs A and B is View Question The truth table for the output Y in terms of three inputs A, B and C are given in table. Draw a logic circuit realizatio View Question Signals A,B,C,D and$$\overline D $$are available. Using a single 8 - to - 1 multiplexer and no other gate, implement t View Question A pulse train with a frequency of 1 MHz is counted using a modulo-1024 ripple-counter built with J-K flip flops. For pro View Question Given,$$\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 $$\overrightarrow View Question Match the following descriptions with each of the diagrams given in Fig. Fields are near the interface, but on opposite View Question Consider an array of two non-directional radiators with spacing$$d\,\, = \,\,0.5\,\,\lambda $$. Determine the direction View Question An optical fiber consists of a cylindrical dielectric rod of refractive index$$n_1$$, surrounded by another dielectric View Question The built-in potential (Diffusion Potential) in a p-n junction View Question If the linear velocity$${\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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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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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 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 $$F\left( s \right) = L\left[ {f\left( t \right)} \right] = {K \over {\left( {s + 1} \right)\,\left( {{s^2} + View Question The Laplace transform of the periodioc function f(t) describe4d by the curve below, i.e.,$$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 $${v_1}(t) = 100\cos (2000\pi t) View Question A low pass signal m(t) band-limited to B Hz is sampled by a periodic rectangular pulse train,$${p_\tau }(t) of period
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