modified 9 years ago

Digital Logic Homeworks

01:04:32

Whats does this circuit do?!

published 9 years ago

ingandrestamayo

9 years ago

I think is a xor, same imputs equal 0

hosseinsanaye

9 years ago

Alright, but this circuit has two output nodes! It's equivalent is not just a basic gate.

billoute720

9 years ago

Green ouput is logical XOR. Blue output is logical AND.

nock

9 years ago

Its a half adder

mkmfl

9 years ago

upper side is equavalent of XOR gate. down side is a simple AND gate. İf you add an OR gate to the end with has inputs upper side and down side; hole circuit will equavalent of OR gate.

Robert_Kidd

9 years ago

As said by others, green is XOR and blue is AND. Same result can be achieved by removing top two AND gates, then connect outputs of the two NOT gates straight to XOR gate. Same logical functions with less gates!

Robert_Kidd

9 years ago

Better still, use only the XOR and one AND gate. Same function with just 2 gates. Original was not a good design at all but maybe it was set as a test?

Robert_Kidd

9 years ago

And yes, the circuit is a half adder as nock says. The bottom AND being the 'carry'. Nuff said!

hosseinsanaye

9 years ago

I do appreciate your comments guys. Nice to find out it's a half adder. Tnx @Robert_kidd for comprehensive description ;)

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