What type of transistor is used in CMOS logic?
In CMOS (Complementary Metal-Oxide-Semiconductor) technology, two types of transistors are used: the NMOS (n-type Metal-Oxide-Semiconductor) transistor and the PMOS (p-type Metal-Oxide-Semiconductor) transistor.
NMOS transistors are used to pass a strong logic ‘0’ and are typically faster due to higher electron mobility. PMOS transistors, on the other hand, are used to pass a strong logic ‘1’ and generally consume less static power when turned off. By combining both NMOS and PMOS transistors in a complementary configuration, CMOS technology achieves high efficiency, low power consumption, and strong noise immunity, making it ideal for integrated circuits in digital logic, microprocessors, and memory devices.