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CMOS (Complementary Metal Oxide Semiconductor) - Definition

CMOS is the abbreviation of Complementary Metal Oxide Semiconductor. CMOS is a widely used type of semiconductor which uses both NMOS (negative polarity) and PMOS (positive polarity) circuits. Since only one of the circuit types is on at any given time, CMOS chips require less power than chips using just one type of transistor. This makes them particularly attractive for use in battery-powered devices, such as portable computers. Personal computers also contain a small amount of battery-powered CMOS memory to hold the date, time, as well as the system setup parameters so they do not have to be constantly set.

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