Complementary metal–oxide–semiconductor (CMOS), is a major class of integrated circuits. CMOS technology is used in microprocessors, microcontrollers, static RAM, and other digital logic circuits. CMOS technology is also used for a wide variety of analog circuits such as image sensors, data converters, and highly integrated transceivers for many types of communication.

CMOS is also sometimes referred to as complementary-symmetry metal–oxide–semiconductor. The words "complementary-symmetry" refer to the fact that the typical digital design style with CMOS uses complementary and symmetrical pairs of p-type and n-type metal oxide semiconductor field effect transistors (MOSFETs) for logic functions.

Answered by archana , an ibibo Specialist, at 10:05 PM on March 04, 2008

CMOS stands for "complementary metal-oxide semiconductor" is the semiconductor technology used in the transistors that are manufactured into most of today's computer microchips. In CMOS technology, both kinds of transistors are used in a complementary way to form a current gate that forms an effective means of electrical control.

Answered by Ashish , an ibibo Wizard, at 9:05 PM on February 27, 2008

In CMOS (Complementary Metal-Oxide Semiconductor) technology, both N-type and P-type transistors are used to realize logic functions. Today, CMOS technology is the dominant semiconductor technology for microprocessors, memories and application specific integrated circuits (ASICs). The main advantage of CMOS over NMOS and bipolar technology is the much smaller power dissipation. Unlike NMOS or bipolar circuits, a CMOS circuit has almost no static power dissipation. Power is only dissipated in case the circuit actually switches. This allows to integrate many more CMOS gates on an IC than in NMOS or bipolar technology, resulting in much better performance.

The following applets demonstrate the N-type and P-type transistors used in CMOS technology, the basic CMOS inverter, NAND and NOR gates, and an AOI32 complex gate.
Finally, it demonstrates the CMOS transmission-gate and a transmisson-gate D-latch.

The first applet illustrates the function of both N-type and P-type MOS transistors.

Click on the source and gate contacts of the transistors to toggle the corresponding voltage levels and watch the resulting output value on the drain contacts. The applet uses colors to display the different voltages.

* A logical '1' corresponding to electrical level VCC (typical values for current technolgies are +5V or +3.3V) is shown in red,
* a logical '0' (corresponding to 0V or GND) in blue.
* A floating wire (not connected to either VCC or GND) is shown in orange.

source :
http://tams-www.informatik.uni-h amburg.de/applets/cmos/cmosdemo.htm l

Answered by Smarty , an ibibo Master, at 1:26 AM on February 20, 2008

well, CMOS stands for Complementary Metal Oxide Semiconductor -- a semiconductor technology used in many integrated circuits,one of the two main types of image sensors used in digital cameras. Its basic function is the same as that of a CCD. CMOS sensors are currently found in only a handful of digital cameras.

Answered by Romi , an ibibo Master, at 9:51 PM on February 19, 2008

hello harish ,i think CMOS technology is used in microprocessors, microcontrollers, static RAM, and other digital logic circuits.

Answered by Uttam , an ibibo Master, at 12:26 PM on February 19, 2008

Complementary metal–oxide–semiconductor (CMOS) is a class of integrated circuits. CMOS technology is used in microprocessors, microcontrollers, static RAM, and other digital logic circuits. CMOS technology is also used for a wide variety of analog circuits such as image sensors, data converters, and highly integrated transceivers for many types of communication.

In CMOS technology, both N-type and P-type transistors are used to realize logic functions. Today, CMOS technology is the dominant semiconductor technology for microprocessors, memories and application specific integrated circuits (ASICs). The main advantage of CMOS over NMOS and bipolar technology is the much smaller power dissipation. Unlike NMOS or bipolar circuits, a CMOS circuit has almost no static power dissipation. Power is only dissipated in case the circuit actually switches. This allows to integrate many more CMOS gates on an IC than in NMOS or bipolar technology, resulting in much better performance.

Answered by Kannan , an ibibo Specialist, at 11:27 AM on February 19, 2008

Complementary metal–oxide–semiconductor (CMOS) is a major class of integrated circuits. CMOS technology is used in microprocessors, microcontrollers, static RAM, and other digital logic circuits. CMOS technology is also used for a wide variety of analog circuits such as image sensors, data converters, and highly integrated transceivers for many types of communication.

source: googles

Answered by Sunita , an ibibo Advisor, at 12:20 AM on February 19, 2008

this is a revolutionary technology in the semiconductor devices which has reduced the cost heat and the size of the chip.
This is complimentary metal oxide semiconductor

Answered by Rahul , an ibibo Citizen, at 10:37 PM on February 18, 2008

Complementary metal–oxide–semiconductor (CMOS), is a major class of integrated circuits. CMOS technology is used in microprocessors, microcontrollers, static RAM, and other digital logic circuits. CMOS technology is also used for a wide variety of analog circuits such as image sensors, data converters, and highly integrated transceivers for many types of communication.

CMOS is also sometimes referred to as complementary-symmetry metal–oxide–semiconductor. The words "complementary-symmetry" refer to the fact that the typical digital design style with CMOS uses complementary and symmetrical pairs of p-type and n-type metal oxide semiconductor field effect transistors (MOSFETs) for logic functions.

Two important characteristics of CMOS devices are high noise immunity and low static power consumption. Significant power is only drawn when the transistors in the CMOS device are switching between on and off states. Consequently, CMOS devices do not produce as much waste heat as other forms of logic, for example transistor-transistor logic (TTL). CMOS also allows a high density of logic functions on a chip.

The phrase "metal–oxide–semiconductor" is a reference to the physical structure of certain field-effect transistors, having a metal gate electrode placed on top of an oxide insulator, which in turn is on top of a semiconductor material. Instead of metal, current gate electrodes (including those up to the 65 nanometer technology node) are almost always made from a different material, polysilicon, but the terms MOS and CMOS nevertheless continue to be used for the modern descendants of the original process. Metal gates have made a comeback with the advent of high-k dielectric materials in the CMOS process, as announced by IBM and Intel for the 45 nanometer node and beyond

Answered by sanjiv dhir , an ibibo Specialist, at 9:41 PM on February 18, 2008

Complementary metal–oxide–semiconductor (CMOS) (pronounced "see-moss", IPA: /siːmɔːs, ˈsiːmɒs/), is a major class of integrated circuits. CMOS technology is used in microprocessors, microcontrollers, static RAM, and other digital logic circuits. CMOS technology is also used for a wide variety of analog circuits such as image sensors, data converters, and highly integrated transceivers for many types of communication.

CMOS is also sometimes referred to as complementary-symmetry metal–oxide–semiconductor. The words "complementary-symmetry" refer to the fact that the typical digital design style with CMOS uses complementary and symmetrical pairs of p-type and n-type metal oxide semiconductor field effect transistors (MOSFETs) for logic functions.

Answered by yogesh , an ibibo Citizen, at 11:46 PM on February 17, 2008