US Patent 7889257 On-chip time-based digital conversion of pixel outputs
Patent 7889257 was granted and assigned to MESA Imaging on February, 2011 by the United States Patent and Trademark Office.
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An integrated sensor chip comprises at least one pixel. The at least one pixel comprises: one or several 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; and 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 stage. 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 generates a count during the generation of the time-varying function; and registers, in which each of the registers is associated with one of the sense nodes during read out, 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.
US Patent 07889257 On-chip time-based digital conversion of pixel outputs US Patent 7889257 On-chip time-based digital conversion of pixel outputs
US Patent 07889257 On-chip time-based digital conversion of pixel outputs
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