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AE 2019 || Day 22 || Digital Electronics Quiz 2

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Question 1

A self-starting counter is one that can start

Question 2

A 4-bit synchronous counter has flip-flops having propagation delay of 50 ns each and AND gates having propagation delay of 20 ns each. The maximum frequency of clock pulses can be

Question 3

The logical expression,

Question 4

The Boolean expression

is logically equivalent to

Question 5

The characteristic equation of a flip-flop gives the next state Q_N+1 in term of the present state Q_N and the inputs. Which one of the following is the characteristic equation of J-K flip-flop?

Question 6

A 4 ×1 MUX is used to implement a 3-input Boolean function as shown below. The Boolean function F(A, B, C) implemented is
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Question 7

Assume that only x and y logic inputs are available, and their complements $Description: F:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE-ME-20-April\GATE-IES-EC-Digital=Electronics-Circuits_files\image253.png$ and $Description: F:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE-ME-20-April\GATE-IES-EC-Digital=Electronics-Circuits_files\image254.png$ are not available. What is the minimum number of 2-input NAND gates required to implement x⊕y?