Thursday, August 30, 2012

AND Gate : Multiplier? Adder? or an "AND" Gate


What is AND Gate? Is it a multiplier ? or an Adder? The answer of this question from 80% fresh graduates is multiplier. In fact many M.Tech's also said the AND gate is a multiplier... In fact the correct answer of this question is AND gate is an AND Gate.. Neither multiplier nor adder. In fact those who said the AND gate is a multiplier told one very important thing that all of them DO NOT UNDERSTAND WHAT IS DIGITAL Electronics. The whole digital electronics is based on Boolean algebra in which there is no operation caller "multiplication" or "addition" Boolean algebra is based on logic.. and the AND is one of the BASIC LOGICAL OPERATION in boolean algebra just like we have addition in airthmatic algebra. Now since we understand that AND gate is an AND gate so let's find out how it works? Let's assume I have a two input (A,B) AND Gate, & the output of this AND gate is Y. So what will be the Y if A=3 and B=5?? To be continued... this is food for thought for the young budding engineers:

5 comments:

  1. The output is "one(1)" :)
    Obtained by ANDing the respective LSBs.

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  2. this is not valid question... a or b should have nly boolen value....

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  3. depends on in which regions of transfer characteristics (of a cmos) these voltages lie...

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