Column-Parallel A/D Conversion Circuit
Technology
Common Technology of Image Sensors

Column-Parallel A/D
Conversion Circuit

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Overview

By placing A/D converters within image sensors in a parallel arrangement for each vertical column of pixels, analog signals read from vertical signal lines can be directly transmitted to the A/D converters in each column in the shortest amount of time. This makes it possible to read out signals at high speed while simultaneously reducing image quality deterioration that results from noise introduced during analog transmission.

Technical Features

Parallel arrangement of A/D converters by columns

Parallel arrangement of A/D converters by columns

Dual noise cancellation to suppress noise

Noise is also reduced through dual noise cancellation, with high-precision cancellation applied to both analog and digital circuits.

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