Single Digit Binary Comparator

00:58:17

Comparing two input signals (A and B). A is top, B is bottom.

Output:
top AND : TRUE if A is larger
middle NOT: TRUE if A is not equal to B
bottom AND : TRUE if B is larger

How does it work?
XOR gates return TRUE iff both inputs are different. so by feeding it into AND, it will return TRUE iff both inputs are the same.

if A and B is different and A is one, it must be the case that A is greater than B.

This is the building block for making binary comparator in higher digits.

published 4 years ago

PrathikP

4 years ago

Don't tie all outputs together and to ground. You are simply shorting the outputs of the gates.

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