### Half adder circuit.

Truth table, schematic and realization of half adder

NAND gates or NOR gates can be used for realizing the half adder in universal logic and the relevant circuit diagrams are shown in the figure below.

Half adder using NAND & NOR logic

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• November 6, 2016

selected question in BCA exam 2016

• william masi
April 14, 2015

useful information. thank u very much.

• Anjali kharge
November 6, 2014

Excellent

• preeti ranjan
September 2, 2014

plz rply to my q as soon as possible???

• preeti ranjan
September 2, 2014

why adder is called combinational ckt??

• Sagar r n
October 15, 2014

Bcoz combinational logic circuit is one which is solely depends upon the present state of the input. Not on the previous result. And even half adder also does not depend upon the previous results. I hope you’re clear now !!

• kusm
December 23, 2014

Bcz it is combination of circuit like : And gate + exor gate like that perform half adder smiliary we can perform all arthmetic expersion using these gate using combining

December 13, 2017

A combinational circuit that performs the addition of the two binary numbers is called the half adder. … The operation is performed by the logic circuit called half adder. The half adder produces two binary digit as output, a sum bit and the carry bit and accepts two binary digit as input.

• mahendra
October 14, 2013

great ….. 🙂 work

• nina
October 12, 2013

oops sry!! its giving the right result

• nina
October 12, 2013

the half adder circuit with nor gates isnt giving the desired output

• ismail
August 20, 2013

nice

• Osanda
April 7, 2013

Fine …..

• مكارم زوين
March 16, 2013