GATE 1997 Electronics & Communication
21 questions across 1 session
A parabolic dish antenna has a conical beam 2 0 wide. The directivity of the antenna is approximately
A 2-bit binary multiplier can be implemented using
A signed integer has been stored in a byte using the 2's complement format. We wish to store the same integer in a 16-bit word. We should
The curve given by the equation $${x^2} + {y^2} = 3axy$$ is
In standard TTL the 'totem pole' stage refers to
The laplace transform of $${e^{\alpha t}}\,\cos \,\alpha \,t$$ is equal to ____________.
A rectangular air-filled waveguide has a cross section of $$4\,cm\,\, \times \,\,10cm$$. The minimum frequency which can propagate in the waveguide is
The line code that has zero dc component for pulse transmission of random binary data is
A probability density function is given by $$p(x) = \,K\,\,\exp \,\,( - \,{x^2}/2),\,\, - \,\infty \, < \,x < \,\infty $$. The value of K should be
A transmission line of 50$$\Omega $$ characteristic impedance is terminated with a 100 $$\Omega $$ resistance. The minimum impedance measured on the line is equal to
The gate delay of an NMOS inverter is dominated by charge time rather than discharge time because
Negative feedback in 1. Voltage series configuration 2.Current shunt configuration (a) increases input impedance (b) decreases input impedance (c) increases closed loop gain (d) le...
A certain linear time invariant system has the state and the output equations given below $$$\left[ {\matrix{ {\mathop {{x_1}}\limits^ \bullet } \cr {\mathop {{x_2}}\limits^ \bulle...
The inverter 74AL SO4 has the following specifications: $${I_{OH}}{\,_{\max \,}} = \, - $$ 0.4mA, $${I_{OL}}$$ max = 8mA, $${I_{IH}}$$ max = $$\mu $$A , $${I_{IL\,}}_{\max \,}$$=0....
The units of $$\frac q{KT}$$ are
The Laplace Transform of e at .cos$$\left( {\alpha t} \right).u\left( t \right)$$ is equal to
The power spectral density of a deterministic signal is given by $${\left[ {\sin (f)/f} \right]^2}$$, where 'f' is frequency. The autocorrelation function of this signal in the tim...
If the Fourier Transfrom of a deterministic signal g(t) is G (f), then Item-1 (1) The Fourier transform of g (t - 2) is (2) The Fourier transform of g (t/2) is Item - 2 (A) G(f) $$...
The function f(t) has the Fourier Transform g($$\omega $$). The Fourier Transform of $$$g(t) = \left( {\int\limits_{ - \infty }^\infty {g(t){e^{ - j\omega t}}} } \right)\,is$$$
Match each of the items 1, 2 on the left with the most appropriate item A, B, C or D on the right. In the case of a linear time invariant system List - 1 (1) Poles in the right hal...
In an 8085$$\mu$$P system, the RST instruction will cause an interrupt