Patent ID: 9521337
Filing Date: 2016-12-13
CPC Classification: H04N

Claim Text:
1. A pixel for use in a digital image sensor, the pixel comprising: a photosensitive element that exhibits an output signal in response to incident light; a comparator to receive the output signal from the photosensitive element and to assert an asynchronous-reset signal upon detecting that the output signal exceeds a threshold; a reset circuit to reset the photosensitive element to an initial condition in response to assertion of the asynchronous-reset signal; a memory element to store, in response to assertion of the asynchronous-reset signal, a digital value indicating that the photosensitive element has been reset; and output circuitry to output from the pixel onto a multiplexed read-out line of the digital image sensor at respective times (i) a digital signal representative of the digital value stored within the memory element in a digital sampling operation, and (ii) an analog signal representative of the output signal of the photosensitive element in an analog sampling operation.