Subtracter

logic-circuits

Definition

Subtracter

A subtracter is a circuit that takes two inputs $A,B$ and outputs $A-B$, which is equivalent to:

$$A-B=A+\bar{B}+1$$

The symbol of this circuit looks similar to an adder:

¹

Footnotes

1. DDCA Ch5 - Part 6: Subtractors & Comparators - YouTube ↩