verb (used with object) 1. to keep in existence or continuance; preserve; retain: to maintain good relations with neighboring countries. 2. to keep in an appropriate condition, operation, or force; keep unimpaired: to maintain order; to maintain public highways.
CMOS is a type of integrated circuit chip manufacturing process that can be used for many things, including digital camera image sensors.hey also require less power to use than do CCD sensors, which makes them popular in mobile devices. The drawback to CMOS sensors when used in cameras is that they tend to create photographs with a lot of image noise when used in lower light situations, though this is not always the case.
Both CCD sensor and CMOS sensor (as so called), are actually using same kind of sensor called Photo diode. Photo diode is a P N junction diode that will convert photon of the light that is bombing the junction into proportional amount of electron.here 2 exception. CMOS sensor can be made very big and have same sensitivity as CCD sensor. CMOS sensor are very fast, it is 10 ~100 times faster then CCD sensor, so it is very good for special application such as high ens DSC camera (Cannon D-30) or fast frame camera.