identity gate; identity element
A digital logic gate that outputs the same value as its input; used in computing contexts.
An identity gate outputs the same signal as its input.
論理素子 is a general term for logic elements, while 一致素子 specifically refers to an identity gate.
Compound of 一致 (matching, identity) and 素子 (element, device). The exact historical derivation is uncertain; the term is used in computing.