Phase lock loop circuit based adjustment of a measurement time window in an optical measurement system
US11645483B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2021 |
| Grant date | May 9, 2023 |
| Priority date | — |
| Expiry date | Aug 11, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/046
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An exemplary system includes a photodetector configured to generate a photodetector output pulse when the photodetector detects a photon from a light pulse having a light pulse time period, a TDC configured to monitor for the occurrence of the photodetector output pulse during a measurement time window that is within and shorter in duration than the light pulse time period, a PLL circuit for the TDC, and a precision timing circuit connected to the PLL circuit and configured to adjust, based on at least one signal generated within the PLL circuit, a temporal position of the measurement time window within the light pulse time period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.