Digital tachometer
US6073087A · kind A · utility
2Cited by
8References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1996 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | Nov 20, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/489
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit for generating a speed value corresponding to a rotational frequency of a rotating shaft. A digital tachometer circuit has a tachometer circuit and a copy/hold circuit. The tachometer circuit maintains an intermediate speed value which is incremented by a gain constant as the rotational frequency increases and is decremented as the rotational frequency decreases. The copy/hold circuit samples the intermediate speed value at selected intervals, thus generating the speed value. The speed value is displayed to a user and represents the vehicle's speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.