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GATE 2019: Digital Circuits Quiz 4

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Question 1

what are basic gates required to implement a full adder

Question 2

A digital system is required to amplify a binary-encoded audio signal. The user should be able to control the gain of the amplifier from a minimum to a maximum in 100 increments. The minimum number of bits required to encode, in straight binary is

Question 3

Consider the circuit given below

Which of the following statements is true for Y.

Question 4

A one-bit full adder is to be implemented using 8-to-1 multiplexers (MUX).
Write the truth table for sum (S) and carry to the next stage (CN) in terms of the two bits (A, B) and carry from the previous stage (C ­p). The truth table should be in the ascending order of (A, B, Cp), i.e. (000, 001, 010, … etc.).

Question 5

Implement S and CN using 8-to-1 multiplexers.

Question 6

consider the combinational circuit shown below

What is the circuit shown in figure

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May 9ESE & GATE EC