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GATE 2019: Signals & Systems Rapid Quiz 2

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Question 1

In figure, the value of R is

Question 2

The MUX shown below is 4 × 1 multiplexer. The output for an input of A, B, C will be


Question 3

Consider the circuit shown below which is a 4-bit DAC.



The input bits 0 and 1 are represented by 0 and 5 V respectively. The Op-amp is ideal, but all the resistances and the 5V inputs have a tolerance of ± 10 %. The specification (rounded to the nearest multiple of 5%) for the tolerance of the DAC is……………%.

Question 4

An SSB-AM signal is generated by modulated the carrier signal c(t) = 100cos(2πfct) with a message signal m(t) = cos(4000πt) + 2sin(4000πt). If the carrier frequency fc = 100 kHz, then the magnitude spectrum of standard lower side band SSB-AM signal will be

Question 5

In the figure below, one cycle of a sinusoid for 0 ≤to≤ π is shown. Let the Laplace transform of x(t) is

What is the value of k in the expression?

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Jul 22ESE & GATE EE