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CCD - charge-coupled device

In a CCD sensor, every pixel's charge is transferred through a very limited number of output nodes (often just one) to be converted to voltage, buffered, and sent off-chip as an analog signal. All of the pixel can be devoted to light capture, and the output's uniformity (a key factor in image quality) is high.

cheaper devices have these as the power required is lower - webcams and handphones have these rather than CMOS sensors

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