Light sensor with a high sensitivity using a sigma-delta analog to digital converter and sensing method thereof
US11237048B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Sep 25, 2020 |
| Grant date | Feb 1, 2022 |
| Priority date | — |
| Expiry date | Sep 25, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2001/446
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A light sensor includes a light sensing element, a first integrator and a sigma-delta analog-to-digital converter. The light sensing element senses light during a measurement period to generate a first current. The first integrator is coupled to the light sensing element and configured to receive the first current and generates a first integration signal. The sigma-delta analog-to-digital converter is coupled to the first integrator and used to convert the first integration signal to a sensing value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.