GATE ECE 1993

## GATE ECE

For the amplifier circuit of figure, the transistor has a $$\mathrm\beta$$ of 800. The mid-band voltage
gain $$V_0/V_1$$

View Question The bandwidth of an n-stage tuned amplifier, with each stage having a band
width of B, is given by

View Question In a multi-stage RC-Coupled Amplifier the coupling capacitor.

View Question Negative feedback in Amplifiers.

View Question In a transistor push-pull Amplifier

View Question For the ideal Op-Amp circuit of fig. Determine the output voltage V0

View Question Find the output voltage, V0 in the following circuit assuming that the Op-Amps are ideal.

View Question Which of the following demodulator(s) can be used for demodulating the signal
$$x(t)\;=\;5\left(1+2\;\cos200\mathrm{πt}\

View Question A superheterodyne radio receiver with an intermediate frequency of 455 KHz is
tuned to a station operating at 1200 KHz.

View Question If $$s^3+\;3s^2\;+\;4s\;+A\;=\;0$$ ,then all the roots of this equation are in the left half plane
provided that

View Question 2’s complement representation of a 16-bit number (one sign bit and 15
magnitude bits) is FFFI. Its magnitude in decimal

View Question For the logic circuit shown in Figure, the output is equal to

View Question Boolean expression for the output of XNOR (equivalence) logic gate with inputs A and B is

View Question The truth table for the output Y in terms of three inputs A, B and C are given in
table. Draw a logic circuit realizatio

View Question Signals A,B,C,D and $$\overline D $$ are available. Using a single 8 - to - 1 multiplexer and no other gate, implement t

View Question A pulse train with a frequency of 1 MHz is counted using a modulo-1024 ripple-counter built with J-K flip flops. For pro

View Question Given,$$\overrightarrow V=x\cos^2y\;\;\widehat{\mathrm i}\;+\;\mathrm x^2\mathrm e^\mathrm z\;\widehat{\mathrm j}\;+\;\m

View Question A material is described by the following electrical parameters at a frequency of $$10$$ GHz is $$\sigma = {10^6}$$ mho/

View Question Consider a transmission line of characteristic impedance 50 ohm. Let it be terminated at one end by ( + j50) ohm. The VS

View Question A plane wave is incident normally on a perfect conductor as shown in Fig. Here $$E_x^i,\,\,H_y^i$$ and $$\overrightarrow

View Question Match the following descriptions with each of the diagrams given in Fig. Fields are near the interface, but on opposite

View Question Consider an array of two non-directional radiators with spacing $$d\,\, = \,\,0.5\,\,\lambda $$. Determine the direction

View Question An optical fiber consists of a cylindrical dielectric rod of refractive index $$n_1$$, surrounded by another dielectric

View Question The built-in potential (Diffusion Potential) in a p-n junction

View Question If the linear velocity $${\overrightarrow V }$$ is given by $$\overrightarrow V = {x^2}y\overrightarrow i + xyz\overri

View Question Given the differential equation $${y^1} = x - y$$ with initial condition $$y(0)=0.$$ The value of $$y(0.1)$$ calculated

View Question In a microcomputer, wait states are used to

View Question In a microprocessor, the register which holds the address of the next instruction to be fetched is

View Question A dc circuit shown in figure has a voltage source V, a current source I and several
resistors. A particular resistor R d

View Question A network contains linear resistors and ideal voltage sources. If values of all the
resistors are doubled, then the volt

View Question The two electrical sub-network N1 and N2 are connected through three resistors
as shown in figure. The voltage across

View Question If the secondary winding of the ideal transformer shown in the circuit of the
figure has 40 turns, the number of turns i

View Question In the series circuit shown in figure, for series resonance, the value of the
coupling coefficient K will be

View Question In the circuit of figure, when switch S1
is closed, the ideal ammeter M1
reads 5A.
What will be ideal voltmeter M2
rea

View Question In the following circuit the capacitance varies as C = KQ, where K is a constant
equal to 0.5 Farads/Coulomb and Q, the

View Question An infinite grid is built up by connecting resistors in the manner indicated in
figure, where each branch represents one

View Question In figure, A1, A2 and A3 are ideal ammeters. If A1 reads 5 A, A2, A2 reads 12 A, then A3 should read

View Question If $$F\left( s \right) = L\left[ {f\left( t \right)} \right] = {K \over {\left( {s + 1} \right)\,\left( {{s^2} +

View Question The Laplace transform of the periodioc function f(t) describe4d by the curve below, i.e.,
$$f\left( t \right) = \left\{

View Question Consider the following interconnection of the three LTI systems (Fig.1). $${h_1}(t)$$ , $${h_2}(t)$$ and $${h_3}(t)$$ ar

View Question Sketch the waveform (with properly marked axes) at the output of a matched filter matched for a signal s(t), of duration

View Question Obtain an expression for the signal in figure, for the signal $${v_3}(t)$$ in Fig for $${v_1}(t) = 100\cos (2000\pi t)

View Question A low pass signal m(t) band-limited to B Hz is sampled by a periodic rectangular pulse train, $${p_\tau }(t)$$ of period

View Question