Hello,



Can somebody please tell me how the following circuits can be created?


1- A comparator circuit that outputs 1 whenever two 4bit signed numbers represented in Sign & Magnitude are equal.

2- Same circuit but this time, the two numbers are represented in 1's complement.

3- Also the same circuit, with the two numbers represented in 2's complement.



Thanks

 

1) http://teahlab.com/Combinational/compare/compar4bit.html

 

If you only need an indication of equality, then you only need to do bitwise comparisons. Hint: An exclusive OR is a 1-bit comparator.