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.


References in periodicals archive ?
Cambridge CMOS Sensors is a young company and the CCS801 is their first product for large volume.
2 effective mega pixel Exmor R CMOS sensor and Optical SteadyShot
New Digital SLR Camera with 4K Movie Function (Under Development) Product category Model Mount type Equipped with a 35 mm full-frame CMOS sensor and supporting the recording of 4K video* (at a frame rate of 24P, with Motion-JPEG compression), the next-generation digital SLR camera currently under development will enable exceptional image quality for the creation of innovative and expressive images.
Canon's new CMOS sensor also incorporates a Full HD (1,920 x 1,080 pixels) video output capability.
DIGIC 4 works with the CMOS sensor to deliver 14-bit image processing, for smooth gradation and natural-looking colours -- as well as ensuring ultra-fast startup times and near-instant image review after shooting.
To date, the high-end DSC market has been dominated by more expensive CCDs because CMOS sensors have been unable to match CCDs in resolution and image quality.
The sensor contains proprietary noise reduction circuitry and is fabricated using a proprietary process developed exclusively for ESS's CMOS sensor products.
The 4,536-by-3,024 pixel, 12-bit Kodak CMOS sensor offers the highest megapixel resolution currently available in pro SLR models; and photographers can select two lower resolutions (3 and 6 megapixels) when appropriate.
Manufactured with the metal oxide semiconductor process used for nearly all other microchips, rather than the arcane procedures used for CCDs, CMOS sensors are cheaper, use less power and can be combined with other circuitry on a single chip to save space and boost performance.
New FC 300 Shares a High Speed, Low Noise CMOS Sensor with the FC 200, Forming the Next Generation Family of High Speed Cameras
With 5 MP resolution, this high-speed global shutter CMOS sensor is the first choice for eliminating the smearing effects usually associated with the use of CCD sensors especially in outdoor ITS applications.
3MP backlit CMOS sensor and maximum ISO sensitivity of up to 12,800 shots crisp and sharp pictures even in low light conditions.