Patent ID: 9491390
Filing Date: 2016-11-08
CPC Classification: H03M,H04N

Claim Text:
1. A method of implementing Correlated Multi-Sampling (CMS) in an image sensor with improved analog-to-digital converter (ADC) linearity, comprising: acquiring by a readout circuitry an image data from a first row in a color pixel array; generating by an ADC circuitry included in the readout circuitry a plurality of uncorrelated random numbers used as a plurality of ADC pedestals for the first row, the ADC pedestals including a first ADC pedestal and a second ADC pedestal; storing by a Successive Approximation Register (SAR) included in the ADC circuitry the first ADC pedestal; sampling by the ADC circuitry the image data from the first row against the first ADC pedestal stored in the SAR to obtain a first sampled input data; and converting by the ADC circuitry the first sampled input data from analog to digital to obtain a first ADC output value; once the first ADC output value is obtained,