GATE ECE 1987
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## GATE ECE

(a) Specify the type of the negative feedback in the JFET amplifier shown in Fig. (b)Calculate the voltage gain (V0/Vi)
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In case of class A amplifiers, the ratio (efficiency of transformer coupled amplifier)/(efficiency of a transformer less
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In Fig. if the CMRR of the operational amplifier is 60dB, then the magnitude of the output voltage is
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A rectangular pulse existing between t = 0 and t = T and having an amplitude A is to be received by a matched filter (
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Companding in PCM systems leads to improved signal - to - quantization noise ratio. This improvement is for
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White Gaussian noise is passed through a linear narrow band filter. The probability density function of the envelope of
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The variance of a random variable X is $$\sigma _x^2\,.$$ Then the variance of - kx (where k is a positive constant ) is
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In the signal flow graph shown in fig X2= TX1 where T is equal to
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For the system shown in figure the transfer function $$\frac{\mathrm C\left(\mathrm s\right)}{\mathrm R\left(\mathrm s\r View Question A system has fourteen poles and two zeroes. Its high frequency asymptote, in its magnitude plot, has having a slope of View Question The popular plot of G(s)=$${{10} \over {s{{\left( {s + 1} \right)}^2}}},$$intercepts real axix at$$\omega = {\omega _
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The magnitude plot of the open loop transfer function G(s), of a certain system is given in fig, (a) Determine G(s), if
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A system with derivative control is shown in figure. (a)Determine the transfer function and the characteristic equation
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The subtraction of a binary number Y from another binary number X, done by adding the 2's complement of Y to X, result i
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Fill in the blanks of the statements below concerning the following Logic Families: Standard TTL (74XX), Low power TTL(
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Given that for a logic family, $${V_{OH}}$$ is the minimum output high-level voltage $${V_{OL}}$$ is the minimum outp
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The circuit diagram of a 2 bit A to D converter is shown in figure below. The combinational logic is to be disigned to p
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A 2-input up/down synchrconous counter using two toggle flip-flops is shown in Fig.1. The counter's sequence is to be co
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A ripple counter using negative edge-triggered D-flip flops is shown in Fig.1. The flip-flops are cleared to '0' by a '0
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Choose the correct statements relating to the circuit of figure
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For an electromagnetic wave incident from one medium to a second medium, total reflection takes place when
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A transmission line of pure resistive characteristic impedance is terminated with an unknown load. The measured value of
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An electrostatic field is said to be conservative when
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Two long parallel wires in free space are separated by a distance R and carry currents of equal magnitude but opposite i
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An electric field is given by $$\overrightarrow E = \overrightarrow a {}_x\,{\rm A}\,\,\sin \,\beta ySin\,\,\omega t$$
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The cut-off frequency of a waveguide depends upon
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A thin dipole antenna is $$\left( {\lambda /15} \right)$$ long, where $$\lambda$$ is the voperating wavelength. If the
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In an intrinsic semiconductor the free electron concentration depends on
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The diffusion capacitance of a P-N junction
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A square waveform as shown in the figure is applied across 1 mH ideal inductor.The current through the inductor is a tri
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The impedance function of a parallel $$R$$, $$L$$, $$C$$ circuit has poles located at $$- 3 \pm j4$$ rad/sec. If the
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The value of current through the 1F capacitor of figure is.
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Laplace transform of the functions t u(t) and u(t) sin(t) are respectively:
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