Write the truth table for circuit given in figure below consisting of NOR gates and identify the logic operation (OR, AND, NOT), which this circuit is performing.

(Hint: A = 0, B = 1 then A and B inputs of second NOR gate will be 0 and hence Y = 1. Similarly work out the values of Y for other combinations of A and B. Compare with the truth table of OR, AND, NOT gates and find the correct one.)

Solution

In the given figure first portion represents NOR gate, second represents NOT gate.

First operation is to calculate the output of 1 which acts as input for 2.

Second gate inverts it and we get final output Y.

Which is truth table for OR gate.

The boolean expression for the given circuit is,

y^{,} = A + B = A . B

and

y = y^{'} = A . B = \bar{A} + \bar{B} = A + B

which is the expresson for OR gate.

For Daily Free Study Material Join wiredfaculty

Wave Optics

Some More Questions From Wave Optics Chapter

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Phone Number

Email Address

Loaction