GATE ECE 1989 | GATE ECE Year Wise Previous Years Questions

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GATE ECE 1989

MCQ (Single Correct Answer)

-0.6

Refer to Fig. GATE ECE 1989 Analog Circuits - Operational Amplifier Question 18 English

For $${V_i} > 0,\,\,{V_0}\, = - {{{R_2}} \over {{R_1}}}{V_i}$$

For $${V_i} > 0,\,\,{V_0}\, = 0.$$

For $${V_i} < 0,\,\,{V_0}\, = - {{{R_2}} \over {{R_1}}}{V_i}$$

For $${V_i} < 0,\,\,{V_0}\, = 0.$$

GATE ECE 1989

MCQ (More than One Correct Answer)

-0.6

In binary data transmission DPSK is preferred to PSK because

a coherent carrier is not required to be generated at the receiver.

for a given energy per bit, the probability of error is less.

the 180⁰ phase shifts of the carrier are unimportant.

more protection is provided against impulse noise.

GATE ECE 1989

Subjective

+10

-0

A signal of bandwidth 3.5 kHz has peak-to-peak and rms amplitudes of 4 V and 0.2 V, respectively. This signal is passed through a linear PCM coder and then transmitted over a channel capable of supporting a transmission rate of 60 kbps. Calculate the maximum signal-to-quantization-noise ratio that can be obtained using this system.

GATE ECE 1989

Subjective

+10

-0

For the input signal, x(t), shown in Fig.

(a) Sketch the impulse response, h(t), of the matched filter.
(b) Sketch the output, y(t), of the matched filter. Fully label your diagram.
(c) If the input to the matched filter consists of the signal, x(t), plus additive white noise of two sided spectral density of $${10^{ - 6}}$$ watts/Hz, find the maximum output SNR of the matched filter.

GATE ECE 1989 Communications - Digital Communication Systems Question 5 English

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