Circuit for measuring a time interval using a high-speed serial receiver
US8265902B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 2009 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Aug 23, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04F10/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit measures a time interval between a first event and a second event. One or more activity inputs receive a respective signal indicating the first and second events. For each activity input, a respective high-speed serial receiver includes a sampling circuit and a deserializer. The sampling circuit generates sample bits from sampling the respective signal at active edges of a clock signal. The deserializer converts the sample bits into a sequence of parallel data words. The sample bits undergo a first change in response to the first event and a second change in response to the second event. An arithmetic circuit receives the sequence of parallel data words from the respective high-speed serial receiver. The arithmetic circuit determines a number of the sample bits between the first and second changes in the sequence of parallel data words. The number measures the time interval between the first and second events.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.