Patent ID: 7889257

Claim:
An integrated sensor chip comprising at least one pixel, wherein the at least one pixel comprises: at least two integration regions for receiving and storing photogenerated charges; a modulation region that moves the photogenerated charges to be stored in the at least two integration regions; sense nodes, in which each of the sense nodes is associated with one of the integration regions, into which the photogenerated charges are moved from the integration regions during a readout cycle; and wherein the chip comprises: at least one function generator for generating a time-varying function that is applied to the integration regions during the readout cycle to move the photogenerated changes to the sense nodes; a counter that generates a count during the generation of the time-varying function; registers, in which each of the registers is associated with one of the sense nodes during the readout cycle, for storing digital values; wherein the registers store the count in response to the associated sense node receiving photogenerated charges from the associated integration regions.