Before revision: A level shifter (level translator), in digital electronics, also called logic-level shifter or voltage level translation , is a circuit used to translate signals from one logic level or voltage domain to another, allowing compatibility between ICs with different voltage requirements, such as TTL and CMOS.
After revision: In digital electronics, also called logic-level shifter or voltage level translator , is a circuit used to translate signals from one logic level or voltage domain to another, allowing compatibility between integrated circuitsa level shifter, with different voltage requirements, such as TTL and CMOS.