High performance photosensor
US7586168B2 · kind B2 · utility
3Cited by
0References
13Claims
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Assignee
Inventor
Key dates
| Filing date | May 17, 2007 |
| Grant date | Sep 8, 2009 |
| Priority date | — |
| Expiry date | Nov 27, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/57
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A photosensor includes a photovoltage generator for generating a photovoltage, and a comparator for determining a number of integer multiples of a threshold voltage associated with the photosensor. A primary counter is incremented by the determined number of integer multiples. A voltage injector adds at least one unit of voltage to the comparator, with each voltage unit having a value less than the threshold voltage. A secondary counter determines a number of voltage units needed to cause the voltage in the comparator to attain an integer multiple of the threshold voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.