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## GATE ECE 1999

Exam Held on Thu Jan 01 1970 00:00:00 GMT+0000 (Coordinated Universal Time)
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## GATE ECE

A dc power supply has a no-load voltage of 30V, and a full-load voltage of 25 V ...
A bipolar junction transistor amplifier circuit is shown in the figure. Assume t...
An NPN transistor (with $${C_\pi }\,\, = \,\,0.3\,\,$$ pf) has a unity gain cut...
An amplifier is assumed to have a single pole high frequency transfer function. ...
The first dominant pole encountered in the frequency response of a compensated o...
An amplifier has an open loop gain of 100, an input impedance of 1 k$$_\Omega$$...
Negative feedback in an amplifier
Crossover distortion behavior is characteristic of
A modulated signal is given by, $$s\left(t\right)=m_1\left(t\right)\cos\left(2{\... Four independent messages have bandwidths of 100Hz, 100 Hz, 200Hz and 400Hz resp... The peak-to-peak input to an 8-bit PCM coder is 2 volts . The signal power - to ... The input to a matched filter is given by$$$S\left( t \right) = \left\{ {\matr... Consider the points s<sub>1</sub> = −3 + j4 and s<sub>2</sub> = −3 − j2 in the s... For a second-order system with the closed-loop transfer function $$T\left(s\ri... If the closed-loop transfer function T(s) of a unity negative feedback system is... The loop transfer function of a feedback control system is given by$$$G\left(s\...
The gain margin of a system having the loop transfer function G(s)H(s) =$${{\sqr... The phase margin (in degrees) of a system having the loop transfer function is ... The asymptotic bode plot of the minimum phase open-loop transfer function G(s)H(... Consider a feedback system with the open loop transfer function given by$$G(s)H...
The system mode described by the state equations $$X = \left( {\matrix{ 0 &a... For the system described by the state equation$$$\mathop x\limits^ \bull... The Logical expression $$Y = A + \overline A B$$ is equivalent to For a binary half-subtractor having two inputs A and B, the correct set of Logic... The minimized form of the logical expression ($$\overline A \,\overline B \,\ove... In certain application, four inputs A, B, C, D (both true and complement forms a... For a binary half-sub-tractor having two inputs A and B, the correct set of logi... The ripple counter shown in the figure works as a <img class="question-image" s... Commercially available ECL gates use two ground lines and one negative supply in... A Darlington Emitter follower circuit is sometimes used in the output stage of a... The resolution of a 4-bit counting ADC is 0.5 Volts. For an analog input of 6.6 ... The circuit diagram of a synchronous counter is shown in the figure. Determine t... An electric field on a plane is described by its potential V =$$20\left(r^{-1}\... Assuming perfect conductors of a transmission line, pure TEM propagation is NOT ... In a twin-wire transmission line in air, the adjacent voltage maxima are at 12.5... In air, a lossless transmission line of length 50 cm with $$L = 10\,\mu H/m,\,\,... Identify which one of the following will <b>NOT</b> satisfy the wave equation. Indicate which one of the following modes do NOT exist in a rectangular resonant... A plane wave in free space with <br>$$\overrightarrow E = \left( {\sqrt \pi }... A transmitting antenna radiates 251 W isotropically. A receiving antenna, locate... The average power of an omni-directional antenna varies as the magnitude of cos(... A 100 m section of an air-filled rectangular wave-guide operating in the $$T{E_{... An n-channel JEFT has I<sub>DSS</sub> = 2 mA and V<sub>p</sub> = −4 V. It's tran... If$$\,\,L\left\{ {f\left( t \right)} \right\} = F\left( s \right)$$then$$\,\,... If $$CS\;=\overline{A_{15}}\;A_{14}\;A_{13}$$ is used as the chip select logic o... <p>The value of R (in ohms) required for maximum power transfer in the network s... <p>The Thevenin equivalent voltage V<sub>TH</sub> appearing between the terminal... <p>For the network shown in Fig., evaluate the current I flowing through the 2Ω ... A Delta-connected network with its Wye-equivalent is shown in Fig.P2.4. The resi... Identify which of the following is NOT a true of the graph shown in Fig. <img al... In the circuit of figure, the switch $$'S'$$ has remained open for a long time. ... A 2-port network is shown in figure. The parameter $${h_{21}}$$ for this network... A coil with a quality factor $$(Q)$$ of $$10$$ is put in series with a capacitor... A modulated signal is given by s(t)= $${e^{ - at}}$$ cos $$\left[ {({\omega _c} ... A signal x(t) has a Fourier transform X ($$\omega $$). If x(t) is a real and odd...$$If\,\,L\left[ {f\left( t \right)} \right]\, = \,F\left( s \right),$$then$$L\... The z-transform F(z) of the function f(nT) = $${a^{nT}}$$ is The z-transform of a signal is given by c(z)=$${1 \over 4}{{{z^{ - 1}}(1 - {z^{ ... The input to a channel is a band pass signal. It is obtained by linearly modulat... The input to a matched filter is given by$$s(t) = \left\{ {\matrix{ {10\sin ... The Nyquist sampling frequency (in Hz) of a signal given by$\$16 \times {10^{4\,...

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