half subtractor
A digital logic circuit that subtracts two single-bit binary numbers, producing a difference and a borrow output. Domain-specific computing term.
A half subtractor is used as a building block for a full subtractor.
A full subtractor handles borrow input from a previous stage, while a half subtractor does not.
A half adder performs addition, whereas a half subtractor performs subtraction.
Compound of 半 (half), 減算 (subtraction), and 器 (device). A calque of English 'half subtractor'.