CMOS sensor

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CMOS sensor

A CMOS-based chip that records the intensities of light as variable charges similar to a CCD chip. Although initially used in less expensive digital cameras, the quality of CMOS sensors has improved steadily.

CMOS sensors have advantages over CCDs. They can be made like other CMOS chips on standard CMOS fabrication lines, which makes fabrication less costly, and auxiliary circuitry, such as analog-to-digital conversion, can be combined on the same chip. In addition, CMOS chips use less power than CCDs.

Active-Pixel Sensors
Another advantage is speed. Also called "active-pixel sensors," CMOS sensors perform in parallel with amplifiers in each pixel that convert charges to electrical voltages. In contrast, CCDs transfer their charges to shift registers before converting to voltage at a single amplifier stage.

Sony's Exmor CMOS Sensor
Exmor shortens the analog path even more by performing A/D conversion on each column of pixels. While all CMOS sensors perform noise cancellation in the analog domain, Exmor also deploys it in the digital domain. Contrast with CCD sensor. See CMOS camera and digital camera.

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References in periodicals archive ?
The LUMIX S1 comes with a 24.2-megapixel full-frame CMOS sensor (35.6mm x 23.8mm) that provides a wide dynamic range and excellent performance at high sensitivity in addition to a natural yet sharp image description thanks to sufficient light condensation per pixel.
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Low light conditions and blur caused by motion are also tackled with the Galaxy K zoom thanks to a 20.7 megapixel BSI CMOS sensor, blur-reducing Optical Image Stabilizer (OIS), and the Xenon Flash, cutting-edge technology that provides brighter light than LEDs to improve the quality of an image with natural brilliance.
and four times the detail of full HD, the Exmor R CMOS sensor also allows "bokeh"
The camera has a true 4K (4096Eu2160) APS-C sized CMOS sensor with an electronic global shutter and 12 stops of dynamic range.
Sony held the largest share of the global CMOS sensor market in 2012 at 32.1%, according to Techno Systems Research.