GATE ECE 1995
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## GATE ECE

A BJT is said to be operating in the saturation region if
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A transistor having $$\alpha$$ = 0.99 and VBE = 0.7 V, is used in the circuit of the figure.What is the value of the col
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An Amplifier has an open-loop gain of 100 and its lower and upper-cut-off frequency of 100 Hz and 100 kHz respectively,
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An RC-Coupled Amplifier is assumed to have a single-pole low frequency transfer function. The maximum lower-cutoff frequ
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An n-channel JFET has IDSS = 1 mA and Vp = -5 V. Its maximum transconductance is ______
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In the JFET circuit shown in Fig assume that R1||R2 = 1 M$$\Omega$$ and the total stray capacitance at the output to
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In the given circuit if the voltage inputs V- and V+ are to be Amplified by the same Amplification factor, the value of
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A change in the value of the Emitter resistance (Re in a difference Amplifier.
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An op-Amp is used as a zero-crossing detector. If maximum output available from the Op-Amp is $$\pm 12\,\,{V_{p - p}}$$
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To obtain very high input and output impedances in a feedback Amplifier, the mostly used is
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The circuit shown, the figure supplies power to on 8 v speaker or L.S. The vaLUES OF $${I_C}$$ and $${V_{CE}}$$ for thi
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A power Amplifier delivers 50 W output at 50% efficiency. The ambient temperature is 25$$^\circ$$ C. if the maximum all
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Shown that the system in Fig. is a double integrator. In other words, prove that the transfer gain is given by $${{{V_0} View Question If the number of bits per sample in a PCM system is increased from n to n+1, the improvement in signal-to-quanti View Question The signal to quantization noise ratio in an n-bit PCM system View Question For a narrow band noise with Gaussian quadrature and inphase components, the probability density function of its enveolo View Question The transfer function of a linear system is the View Question Signal flow graph is used to find View Question For a second order system, damping ratio$$\left(\xi\right)$$, is 0 &lt;$$\xi$$&lt; 1 ,then the roots of the characte View Question The final value theorem is used to find the View Question If$$L\left(f\left(t\right)\right)=\frac{2\left(s+1\right)}{s^2+2s+5}$$then f(0+) and f($$\infty$$) are given by [Note: View Question The step error coefficient of a system G(s)=$$\frac1{\left(s+6\right)\left(s+1\right)}$$with unity feedback is View Question Non - minimum phase transfer function is defined as the transfer function View Question A 'code converter' is to be designed to convert from the BCD(5421) to the normal BCD (8421). The input BCD combinations View Question The minimum number of NAND gates required to implement the Boolean function$$A + A\overline B  + A\overline B C$$View Question A ROM is to be used to implement the Boolean functions given below:$${F_1}(A,\,B,\,C,\,D) = ABCD + \bar A\,\overli
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The output of the circuit shown in figure is equal to
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A switch-tail ring counter is made by using a single D flip-flop. The resulting circuit is a
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An R-S latch is
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The minimum number of MOS transistors required to make a dynamic RAM cell is
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The intrinsic impedance of a lossy dielectric medium is given by
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Copper behaves as a
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The electric field strength at a distance point, P, due to a point charge, +q, located at the origin, is 100 $$\mu$$V/
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In the infinite plane, y = 6 m, there exists a uniform surface charge density of (1/6000$$\pi$$) $$\mu$$C/m2. The asso
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A rectangular hollow metal waveguide is required to be so designed to propagate a 9375 MHz signal in its $$T{E_{10}}$$-m
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An antenna when radiating, has a highly directional radiation pattern. When the antenna is receiving its radiation patte
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Two dipoles are so fed and oriented in free space that they produce the following electromagnetic waves: $${E_x} = 10\ View Question The probability that an electron in a metal occupies the Fermi-level at any temperature (&gt; 0 K) View Question The drift velocity of electrons in silicon View Question The diffusion potential across a P-N junction View Question A zener diode works on the principle of View Question The depletion capacitance, CJ, of an abrupt P-N junction with constant doping on either side varies with reverse bias, V View Question In a P-type silicon sample, the hole concentration is$$2.25\times10^{15}/cm^3$$. If the intrinsic carrier concentration View Question The breakdown voltage of a transistor with its base open is BVCEO with emitter open is BVCBO, then View Question A BJT is said to be operating in the saturation region if View Question The Ebers-Moll model is applicable to View Question The Early-Effect in a bipolar junction transistor is caused by View Question By reversing the order of integration$$\int\limits_0^2 {\int\limits_{{x^2}}^{2x} {f\left( {x,y} \right)dy\,dx} } $$may View Question The third term in the taylor's series expansion of$${e^x}$$about$$'a'$$would be ________. View Question If$$L\left\{ {f\left( t \right)} \right\} = {{2\left( {s + 1} \right)} \over {{s^2} + 2s + 5}}$$then$$f\left( {{0^ +
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In a microprocessor, when a CPU is interrupted, it
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An 'Assembler' for a microprocessor a used for
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Two 2H inductance coils are connected in series and are also magnetically coupled to each other the coefficient of coupl
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The value of the resistance, R, connected across the terminals, A and B, (ref. Fig.), which will absorb the maximum powe
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Determine the current, i(t), in the circuit given below, (Fig.), using the Thevenin's theorem.
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A DC voltage source is connected across a series R-L-C circuit. Under steady-state conditions, the applied DC voltage dr
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Consider a DC voltage source connected to a series R-C circuit. When the steady-state reaches, the ratio of the energy s
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The current $$i(t)$$ through a $$10$$-$$\Omega$$ resistor in series with an inductance is given by $$i(t)$$$$= 3 + 4\ View Question A series$$R$$-$$L$$-$$C$$circuit has a$$Q$$of$$100$$and an impedance of$$\left( {100 + j0} \right)\,\Omega $$at View Question Find the current-transfer-ratio,$${{I_2}}$$/$${{I_1}}$$, for the network shown below (Fig). Also, mark all branch curre View Question Show that the system shown in Fig. is a double integator. In other words, prove that the transfer gain is given by$${{
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For the 2-port network shown in Fig. determine the h-parameters. Using these parameters, calculate the output (port '2'
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The final value theorem is used to find the
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If L$$\left[ {f\left( t \right)} \right]$$ = $${{2\left( {s + 1} \right)} \over {{s^2} + 2s + 5}}$$, then $$f\left( {0 + View Question A sinsoidal signal, v(t) = A sin(t), is applied to an ideal full-wave rectifier. Show that the Laplace Transform of the View Question The transfer function of a linear system is the View Question Let h(t) be the impulse response of a linear time invariant system. Then the response of the system for any input u(t) i View Question Non - minimum phase transfer function is defined as the transfer function View Question A signal v(t)= [1+ m(t) ] cos$$({\omega _c}t)$$is detected using a square law detector, having the characteristic$${v
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A 1.0 kHz signal is flat - top sampled at the rate of 1800 samples/sec and the samples are applied to an ideal rectangul
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Match each of the items, A, B and C, with an appropriate item from 1, 2, 3, 4 and 5 A. Fourier transform of a Gaussian
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