Hi everyone.
I have to create a multiplier circuit.
The multiplier must have two 4-bit inputs and an 8-bit output.
Only NOR gates are allowed (hint: create subcircuits for the other gates, using only NOR, and use your subcircuit in the multiplier).

This is my circuit. I did it on Logisim. As in the exercise i had to use only NOR gates, so I created complementary circuits (AND, FULL ADDER, HALF ADDER, using NOR gates).
However, my circuit is wrong and I can't find its error.






Complementary circuits using NOR gates


AND




FULL ADDER






HALF ADDER

 

Hello there welcome to AAC
Do you know Boolean algebra D'Morgan's theorem. Basic truth tables?

 

Please don't do double post, one thread is enough, this thread will be locked.
https://forum.allaboutcircuits.com/...s-and-an-8-bit-output-using-nor-gates.174756/