Method and apparatus for interference reduction in optical sensing receivers
US12123774B1 · kind B1 · utility
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20Claims
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Key dates
| Filing date | Apr 25, 2023 |
| Grant date | Oct 22, 2024 |
| Priority date | — |
| Expiry date | Apr 25, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45544
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus for detecting optical signals includes a photodetector. The photodetector is reverse-biased by a first voltage and a second voltage is added to the first voltage to provide an offset equal to the second voltage for the photodetector. A first circuit is coupled to the first circuit to provide the second voltage for the photodetector and a second circuit is coupled to the first circuit to provide the first voltage to the photodetector to reverse-bias the photodetector. The second circuit provides an output voltage proportional to a current of the photodetector at an output of the second circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.