CMOS

Complementary Metal-Oxide Semiconductor technology is very widely used to manufacture a wide range of electronic integrated circuits (chips). CMOS chip digital applications include microprocessors, RAM and dynamic and static memory. They also have a variety of analog applications.

CMOS devices are favored for their immunity to high levels of noise, low static power drain, with significant power only drawn while the transistors switch, and high density packing of logic functions. Being so widely used, the technology is relatively cheap to manufacture.

CMOS imaging sensors are potentially cheaper to make than the alternative CCDs. They also consume less power, can be more light sensitive (and so faster, less noisy and better in low lights), have less image lag and can include image-processing functions on each photosite (cell) on the chip. Each photocell can have its own ADC, so the charge created by the light falling on it is converted into digits on site, then the data is passed to the highways. This way, CMOS imaging sensors with their on-site digitizing, have a much lower noise level and so can work in lower light conditions than CCDs.

CMOS technology also plays a vital role in digital projection where DMD (Digital Micromirror Device) chips make images from data.

See also: DMD