Single phase analog counter for a digital pixel
US11456746B2 · kind B2 · utility
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3References
17Claims
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Key dates
| Filing date | Jan 22, 2020 |
| Grant date | Sep 27, 2022 |
| Priority date | — |
| Expiry date | Jun 5, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/34
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An analog counter circuit for use with a digital pixel includes: an input; an output; a first stage electrically coupled to the input that is charged to an initial charge voltage; a second stage that includes an accumulating charge storage device; and a charge transfer device between the first and second stages that includes a transfer voltage. The charge transfer device allows charge from the first stage to pass to the second stage and be accumulated on the accumulating charge storage device as long as a voltage at a node in the first stage is greater than the transfer voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.