GATE ECE 1989
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## GATE ECE

Of the four biasing circuits shown in Fig. For a BJT, indicate the one which can have maximum bias stability:
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The feedback amplifier shown in Fig.has:
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Refer to Fig.
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In binary data transmission DPSK is preferred to PSK because
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A signal of bandwidth 3.5 kHz has peak-to-peak and rms amplitudes of 4 V and 0.2 V, respectively. This signal is passed
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For the input signal, x(t), shown in Fig. (a) Sketch the impulse response, h(t), of the matched filter. (b) Sketch the
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A source produces 4 symbols with probabilities $${1 \over 2},\,{1 \over 4},\,{1 \over 8}\,\,and\,\,{1 \over 8}.$$ For th
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Zero mean Gaussian noise of variance N is applied to a half wave rectifier. The mean squared value of the rectifier outp
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A part of a communication system consists of an amplifier of effective noise temperature, $$Te = \,\,21\,\,{}^ \circ K\, View Question In order to stabilize the system shown in fig. Ti should satisfy: View Question From the Nicholas chart, one can determine the following quantities pertaining to a closed loop system: View Question Nyquist plot consider a feed back system where the OLTF is:$$G(s) = {1 \over {s\left( {2s + 1} \right)\left( {s + 1} \r
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Indicate which of the following logic gates can be used to realize all possible combinational Logic functions:
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Among the digital IC-families-ECL, TTL and CMOS:
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A logic family has threshold voltage $${V_T}$$= 2V, minimum guaranteed output high voltage $${V_{OH}}$$= 4V, minimum acc
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A chemical reactor has three sensors indicating the following conditions:- (1) Pressure (P) is low or high' (2) Temper
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A 50 ohm lossless transmission line has a pure reactance of (j100) ohms as its load. The VSWR in the line is :
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The skin - depth of copper at a frequency of $$3 GHz$$ is $$1$$ micron ($${{{10}^{ - 6}}}$$ metre). At $$12 GHz$$, for
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The electric field strength at a far-off point P due to a point charge + q, located at the origin O is 100 millivolts/me
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Two vertically oriented half wave dipoles are spaced 1.5 wavelengths apart to from an array. Calculate the half power be
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In the case of ground wave propagation, at far-off distances from the transmitting tower antenna, the Poynting vector is
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Design a rectangilar hollow metal waveguide to operate in the X-band such that at an operating free-space wavelength of
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In a microprocessor system, the stack is used for
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In the circuit of figure, the power dissipated in the register R is 1W when only source '1' is present and '2' replaced
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A load, ZL = RL + jXL is to be matched, using an ideal transformer, to a generator of internal impedance, ZS = RS + jXS
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A 10 Ω resistor, a 1 H inductor and 1 $$\mathrm{μF}$$ capacitor are connected in parallel.The combination is driven by a
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The condition AD - BC = 1 for a two-port network implies that the network is a
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For the transfer function of a physical two-port network
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The condition AD - BC = 1 for a two-port network implies that the network is a
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The half - power bandwidth of the resonant circuit of figure can be increased by
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