Patent ID: 9386240
Filing Date: 2016-07-05
CPC Classification: H03M,H04N

Claim Text:
1. An image sensor comprising: a pixel array; control circuitry coupled to the pixel array for facilitating image acquisitions, wherein pixels in the pixel array are configured to sequentially generate a first reset signal at a first conversion gain, a second reset signal at a second conversion gain that is larger than the first conversion gain, a high gain image signal at the second conversion gain, and a low gain image signal at the first conversion gain, in that order; and a successive-approximation-register (“SAR”) analog-to-digital-converter (“ADC”) including input stage circuitry with a first selectable input and a second selectable input, wherein the SAR ADC is coupled to sequentially receive the first reset signal, the second reset signal, the high gain image signal, and the low gain image signal, in that order, and wherein the input stage circuitry is configured to select the first selectable input when receiving the first reset signal and the low gain image signal and configured to select the second selectable input when receiving the second reset signal and the high gain image signal.