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, $$$G\left(s\right)=\frac K{s\left(s+1\right)\left(s+2\ri
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Block diagram model of a position control system is shown in figure. (a) In absence of derivative feedback (Kt=0) , det
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Bode plot of a stable system is shown in fig. The transfer function of the system is
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A unity feedback system has open-loop transfer function $$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 $$$\left[ {\matrix{ {{{\mathop x\limits^ \bul
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The logic realized by the circuit shown in figure is
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A combinational circuit has three inputs A, B and C and an output F. F is true only for the following input combination
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The initial contents of the 4-bit serial-in-parallel-out, right-shift, Shift Register shown in figure is 0110. After thr
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Choose the correct satatement(s) from the following:
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The figure shows the circuit of a gate in the Resistor Transistor Logic (RTL) family. The circuit represents a
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A new clocked "X-Y" flip-flop is defined with two inputs, X and Y in addition to the clock input. The flip-flop function
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A transmission line whose characteristic impedance is a pure resistance
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A uniform plane wave traveling in free space along the +$$z$$ direction and having its electric field along the$$ x$$-di
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Two dissimilar antennas having their maximum directivities equal
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The beam width-between-first-null of a uniform linear array of N equally-spaced (element spacing = d) equally-excited an
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Elements of a linear array of three equally spaced (element spacing $$0.5\lambda $$ ) vertical mast radiators are excite
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A semiconductor is irradiated with light such that carriers are uniformly generated throughout its volume. The semicondu
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The 6 V Zener diode shown in figure has zero Zener resistance and a knee current of 5 mA. The minimum value of R, so tha
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In a transistor having finite B, the forward bias across the base emitter junction is kept constant and the reverse bias
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An n-channel JFET has a pinch-off voltage VP = -5 V, VDS(max) = 20 V and gm = 2 mA/V. The minimum ‘ON’ resistance is ach
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In an 8085 microprocessor system with memory mapped I/O,
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The following program is run on 8085 microprocessor: At the completion of execution of the program, the program Counte
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Of the four networks, N1,N2, N3 and N4 of figure, the networks having identical driving point functions are
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For the compensated attenuator of figure, the impulse response under the condition $$R_1C_1\;=\;R_2C_2$$ is:
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For the series R-L-C circuit of figure(a), the partial phasor diagram at a certain frequency is shown in figure (b).The
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For a 2-port network to be reciprocal
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Relative to a given fixed tree of a network
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The two-port Darlington impedance booster of figure uses identical transistors $$({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,} & {for\,\,
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