Digital data processor including apparatus for collecting time-related information
US5233573A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1992 |
| Grant date | Aug 3, 1993 |
| Priority date | — |
| Expiry date | Dec 7, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A digital timer apparatus incorporates a free running counter, an interval timer, a capture register, a pulse accumulator and holding logic. A rising or falling edge of an external signal causes the current contents of the free running counter to be loaded into the capture register and causes the pulse accumulator to be incremented. The output of the interval timer can cause the contents of the pulse accumulator and capture register to be stored into the holding logic. The timer apparatus is particularly well suited to performing tasks related to the determination of the speed of rotation of a rotating member and may be used, for instance, in detecting wheel rotational speeds in an anti-lock brake system or detecting shaft rotation speeds in an automatic transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.