GATE ECE 1992
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## GATE ECE

If the transistors in fig. has high value of β and a vBE of 0.65, the current I flowing through the 2 kilo ohms resis
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An n-channel JFET has a pinch-off voltage of Vp = -5V. VDS(max) = 20V and gm = 2mA/V. The minimum 'ON' resistance is a
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The JFET in the circuit shown in fig. has an IDSS = 10mA and Vp = -5V. The value of the resistance Rs for a drain curren
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Assume that the operational amplifier in figure is deal the current I through the IK ohm resistor is
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The circuit of fig. uses an ideal OP_Amp for small positive values of Vin, the circuit works as
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An Op-Amp has an offset voltage of 1mV and is ideal in all other respects. If this OP-Amp is used in the circuit shown i
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Consider the circuit shown in Fig. The circuit uses an ideal operational amplifier. Assuming that the impedances at nood
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The maximum power efficiency of an AM modulator is
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The bit stream 01001 is differentially encoded using 'Delay and Ex OR' scheme for DPSK transmission. Assuming the refere
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Coherent demodulation of FSK signal can be effected using
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Source encoding in a data communication system is done in order to
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For a random variable 'X' following the probability density function, p (x), shown in figure, the mean and the variance
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Given a unity feedback system with open loop transfer function, $$G\left(s\right)=\frac K{s\left(s+1\right)\left(s+2\ri View Question Block diagram model of a position control system is shown in figure. (a) In absence of derivative feedback (Kt=0) , det View Question Bode plot of a stable system is shown in fig. The transfer function of the system is View Question A unity feedback system has open-loop transfer function$$G(s) = {1 \over {s\left( {2s + 1} \right)\left( {s + 1} \right
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A process with open-loop model $$G(s) = {{K{e^{ - s{\tau _d}}}} \over {\tau s + 1}},$$ is controlled by a PID controlle
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A linear time-invariant system is described by the state variable model $$\left[ {\matrix{ {{{\mathop x\limits^ \bul View Question The logic realized by the circuit shown in figure is View Question A combinational circuit has three inputs A, B and C and an output F. F is true only for the following input combination View Question The initial contents of the 4-bit serial-in-parallel-out, right-shift, Shift Register shown in figure is 0110. After thr View Question Choose the correct satatement(s) from the following: View Question The figure shows the circuit of a gate in the Resistor Transistor Logic (RTL) family. The circuit represents a View Question A new clocked "X-Y" flip-flop is defined with two inputs, X and Y in addition to the clock input. The flip-flop function View Question A transmission line whose characteristic impedance is a pure resistance View Question A uniform plane wave traveling in free space along the +$$z$$direction and having its electric field along the$$ x$$-di View Question Two dissimilar antennas having their maximum directivities equal View Question The beam width-between-first-null of a uniform linear array of N equally-spaced (element spacing = d) equally-excited an View Question Elements of a linear array of three equally spaced (element spacing$$0.5\lambda $$) vertical mast radiators are excite View Question A semiconductor is irradiated with light such that carriers are uniformly generated throughout its volume. The semicondu View Question The 6 V Zener diode shown in figure has zero Zener resistance and a knee current of 5 mA. The minimum value of R, so tha View Question An n-channel JFET has a pinch-off voltage VP = -5 V, VDS(max) = 20 V and gm = 2 mA/V. The minimum ‘ON’ resistance is ach View Question In a transistor having finite B, the forward bias across the base emitter junction is kept constant and the reverse bias View Question In an 8085 microprocessor system with memory mapped I/O, View Question The following program is run on 8085 microprocessor: At the completion of execution of the program, the program Counte View Question Of the four networks, N1,N2, N3 and N4 of figure, the networks having identical driving point functions are View Question For the compensated attenuator of figure, the impulse response under the condition$$R_1C_1\;=\;R_2C_2$$is: View Question For the series R-L-C circuit of figure(a), the partial phasor diagram at a certain frequency is shown in figure (b).The View Question For a 2-port network to be reciprocal View Question Relative to a given fixed tree of a network View Question The two-port Darlington impedance booster of figure uses identical transistors$$({h_{ie}} = 1\,k,\,\,{h_{fe}} = \,100,\
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Which of the following signals is/are periodic?
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If G(f) represents the Fourier transform of a signal g (t) which is real and odd symmetric in time, then
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A linear discrete - time system has the characteristic equation, $${z^3} - 0.81\,\,z = 0.$$ The system
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A low pass signal x(t) has a spectrum given by X(f) = \left\{ {\matrix{ {1 - \left| f \right|/2000,} &amp; {for\,\,
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