GATE ECE 1995

## GATE ECE

A BJT is said to be operating in the saturation region if

View Question 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

View Question An Amplifier has an open-loop gain of 100 and its lower and upper-cut-off frequency of 100 Hz and 100 kHz respectively,

View Question An RC-Coupled Amplifier is assumed to have a single-pole low frequency transfer function. The maximum lower-cutoff frequ

View Question An n-channel JFET has IDSS = 1 mA and Vp = -5 V. Its maximum transconductance is ______

View Question In the JFET circuit shown in Fig assume that R1||R2 = 1 M$$\Omega $$ and the total stray capacitance at the output to

View Question In the given circuit if the voltage inputs V- and V+ are to be Amplified by the same Amplification factor, the value of

View Question A change in the value of the Emitter resistance (Re in a difference Amplifier.

View Question An op-Amp is used as a zero-crossing detector. If maximum output available from the Op-Amp is $$ \pm 12\,\,{V_{p - p}}$$

View Question To obtain very high input and output impedances in a feedback Amplifier, the mostly used is

View Question 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

View Question A power Amplifier delivers 50 W output at 50% efficiency. The ambient temperature is 25$$^\circ $$ C. if the maximum all

View Question 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 < $$\xi$$ < 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

View Question The output of the circuit shown in figure is equal to

View Question A switch-tail ring counter is made by using a single D flip-flop. The resulting circuit is a

View Question An R-S latch is

View Question The minimum number of MOS transistors required to make a dynamic RAM cell is

View Question The intrinsic impedance of a lossy dielectric medium is given by

View Question Copper behaves as a

View Question The electric field strength at a distance point, P, due to a point charge, +q,
located at the origin, is 100 $$\mu $$V/

View Question In the infinite plane, y = 6 m, there exists a uniform surface charge density of (1/6000$$\pi $$) $$\mu $$C/m2. The asso

View Question A rectangular hollow metal waveguide is required to be so designed to propagate a 9375 MHz signal in its $$T{E_{10}}$$-m

View Question An antenna when radiating, has a highly directional radiation pattern. When the antenna is receiving its radiation patte

View Question 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 (> 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^ +

View Question In a microprocessor, when a CPU is interrupted, it

View Question An 'Assembler' for a microprocessor a used for

View Question Two 2H inductance coils are connected in series and are also magnetically coupled to each other the coefficient of coupl

View Question The value of the resistance, R, connected across the terminals, A and B, (ref. Fig.), which will absorb the maximum powe

View Question Determine the current, i(t), in the circuit given below, (Fig.), using the Thevenin's theorem.

View Question A DC voltage source is connected across a series R-L-C circuit. Under steady-state conditions, the applied DC voltage dr

View Question Consider a DC voltage source connected to a series R-C circuit. When the steady-state reaches, the ratio of the energy s

View Question 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
$${{

View Question For the 2-port network shown in Fig. determine the h-parameters. Using these parameters, calculate the output (port '2'

View Question The final value theorem is used to find the

View Question 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

View Question 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

View Question 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

View Question