High resolution event occurrance time counter
US4912734A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 14, 1989 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | Feb 14, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K23/542
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A high resolution event occurrence time counter includes a free running counter which is responsive to a clock signal and which provides count data that varies in response to the clock signal. A first register stores the count data of the free running counter. The first register provides first register data representative of the count data stored in the register. A second register stores the first register data and provides first time of arrival data representative of the first register data stored in the second register. A third register stores the count data of the free running counter. The third register provides second time of arrival data representative of the count data which is stored in the third register. A clock edge encoder determines whether an event occurred during the first half cycle of the clock signal or during the second half cycle. The clock edge encoder provides a first sync signal when the event occurred during the first half cycle, and a second sync signal when the event occurred during the second half cycle. The second register stores the first register data in response to the first sync signal, and the third register stores the count data in response to the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.