Device for precisely measuring the duration of a time interval
US5912728A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1997 |
| Grant date | Jun 15, 1999 |
| Priority date | — |
| Expiry date | Feb 28, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention relates to a device for measuring the duration of a time interval between a start signal (D) and an end signal (F) comprising: a clock (H) supplying pulses with a period T, a digital circuit (2, 3, 4) to carry out a coarse measurement of the number of clock pulses between D and F, an analog circuit (6, 8, 10, 12, 14) to carry out a fine measurement of the time respectively between D and the first (respectively between F and the last) clock pulse which begins after D (respectively before F), this circuit comprising: means (8, 10) of generating N ramps with the same direction, means of sampling at least one the ramps at the instants that D and F occur. Application to a microlaser telemeter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.