Complementary metal–oxide–semiconductor (CMOS) (play /ˈsiːmɒs/) is a technology for amalgam dent circuits. CMOS technology is acclimated in microprocessors, microcontrollers, changeless RAM, and added agenda argumentation circuits. CMOS technology is additionally acclimated for several analog circuits such as angel sensors (CMOS sensor), abstracts converters, and awful dent transceivers for abounding types of communication. Frank Wanlass patented CMOS in 1967 (US apparent 3,356,858).
CMOS is additionally sometimes referred to as complementary-symmetry metal–oxide–semiconductor (or COS-MOS).[1] The words "complementary-symmetry" accredit to the actuality that the archetypal agenda architecture appearance with CMOS uses commutual and balanced pairs of p-type and n-type metal oxide semiconductor acreage aftereffect transistors (MOSFETs) for argumentation functions.
Two important characteristics of CMOS accessories are aerial babble amnesty and low changeless ability consumption. Significant ability is alone fatigued back the transistors in the CMOS accessory are switching amid on and off states. Consequently, CMOS accessories do not aftermath as abundant decay calefaction as added forms of logic, for archetype transistor-transistor argumentation (TTL) or NMOS logic. CMOS additionally allows a aerial body of argumentation functions on a chip. It was primarily for this acumen that CMOS became the best acclimated technology to be implemented in VLSI chips.
The byword "metal–oxide–semiconductor" is a advertence to the concrete anatomy of assertive field-effect transistors, accepting a metal aboideau electrode placed on top of an oxide insulator, which in about-face is on top of a semiconductor material. Aluminum was already acclimated but now the actual is polysilicon. Added metal gates accept fabricated a improvement with the appearance of high-k dielectric abstracts in the CMOS process, as appear by IBM and Intel for the 45 nanometer bulge and beyond
CMOS is additionally sometimes referred to as complementary-symmetry metal–oxide–semiconductor (or COS-MOS).[1] The words "complementary-symmetry" accredit to the actuality that the archetypal agenda architecture appearance with CMOS uses commutual and balanced pairs of p-type and n-type metal oxide semiconductor acreage aftereffect transistors (MOSFETs) for argumentation functions.
Two important characteristics of CMOS accessories are aerial babble amnesty and low changeless ability consumption. Significant ability is alone fatigued back the transistors in the CMOS accessory are switching amid on and off states. Consequently, CMOS accessories do not aftermath as abundant decay calefaction as added forms of logic, for archetype transistor-transistor argumentation (TTL) or NMOS logic. CMOS additionally allows a aerial body of argumentation functions on a chip. It was primarily for this acumen that CMOS became the best acclimated technology to be implemented in VLSI chips.
The byword "metal–oxide–semiconductor" is a advertence to the concrete anatomy of assertive field-effect transistors, accepting a metal aboideau electrode placed on top of an oxide insulator, which in about-face is on top of a semiconductor material. Aluminum was already acclimated but now the actual is polysilicon. Added metal gates accept fabricated a improvement with the appearance of high-k dielectric abstracts in the CMOS process, as appear by IBM and Intel for the 45 nanometer bulge and beyond
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