Digital Electronics NUMBER SYSTEM BINARY CODES BOOLEAN ALGEBRA BINARY LOGIC LOGIC GATES BOOLEAN ALGEBRA LAWS CONSENSUS THEOREM DIFFERENT FORS OF BOOLEAN EQUATIONS RELATION B/W MAX & MIN TERMS 16 type of LOGIC FUNCTIONS AND & OR GATE Other GATES XOR & XNOR gates NEGATED & COMPLIMENTRY GATES TRISTATE gates & DIP Illustration of NEGATIVE & POSITIVE LOGIC Relation B/W XOR & XNOR gates UNIVERSAL GATES Implementation of XOR using minimum gates Implementation of XNOR using minimum gates Different levels of CIRCUIT Special Characteristics of an IC QUESTIONS Q1 (Timing Diagram) Q2 (Timing Diagram) Q3 (Timing Diagram - DIfferent units) Q4 (Timing Diagram) Q5 (Output of Series of NOR gate ) Q6 (Output of combination of XOR ) Q7 (Circuit of NAND gates & diff delays) K MAPS COMBINATIONAL CKT SEQUENTIAL CIRCUITS TIMING CIRCUITS

Q5- What is the output of the following circuit?

Ans:  This circuit may look simple to you as one has to just evaluate every NOR gate and get the final output but I say it is even simpler than this. Let’s analyze the truth table of NOR gate:

And we see that even if only one of the 2 inputs is 1 then we need not find out the other input and we can get the output.

As in the above circuit we have one input as 1 to the last NOR gate so we can say that output of the above circuit is ‘0’ without calculating the outputs of other NOR gates.