Image sensor, analog and digital signal processing method and device used therein

Abstract

An analog-to-digital signal processing method used in an image sensor, including: providing a global analog-to-digital converter, which can be used to convert a plurality of analog signals of all pixels of a pixel array of the image sensor into a plurality of A digital signal; providing a parallel analog-to-digital converter, which can be used to convert a plurality of analog signals of a plurality of pixels of the pixel array on different rows into a plurality of analog-to-digital conversion circuits through a plurality of analog-to-digital conversion circuits a digital signal; and dynamically switch to select one of the global analog-to-digital converter and the parallel analog-to-digital converter to perform an analog-to-digital conversion on data of a plurality of pixels of the pixel array.

Description

technical field [0001] The invention relates to an analog and digital signal processing mechanism, especially an image sensor, an analog and digital signal processing method and device used therein. Background technique [0002] Generally, the analog-to-digital conversion mechanism in traditional image sensors can be divided into global analog-to-digital converters and parallel analog-to-digital converters. The global analog-to-digital converter uses a single analog-to-digital conversion circuit to convert all The analog signal generated by the pixel performs an analog-to-digital conversion, and the parallel analog-to-digital converter uses multiple sets of analog-to-digital conversion circuits. For each column of the pixel array, an analog-to-digital conversion circuit is used to control the row. The analog signals generated by the pixels perform an analog-to-digital conversion. [0003] Since the global analog-to-digital converter only uses a single analog-to-digital conv...

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Problems solved by technology

[0004] Therefore, one of the objects of the present invention is to provide a novel analog and digital signal processing method and corresponding device used in image sensors, which can dynamically select and enable and use a less power-consuming one based on different sensing requirements. Analog-to-digital converter to perform analog-to-digital conversion, or choose to enable and use another analog-to-digital converter with faster processing speed to perform analog-to-digital conversion to solve the problem of excessive power consumption of traditional analog-to-digital conversion mechanisms

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