High accuracy method for determining the frequency of a pulse input signal over a wide frequency range
US6597205B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2001 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Dec 21, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R23/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and system for determining the frequency of a pulse input signal is disclosed. A pulse count and a timer count can be captured at a start and end of a predetermined measurement interval to thereby obtain a start pulse count and an end pulse count and a start pulse time and an end pulse time thereof. A pulse frequency can then be determined, the pulse frequency comprises the end pulse count minus the start pulse count divided by the end pulse time minus the start pulse time, thereby permitting a highly accurate frequency measurement of the pulse input signal to be obtained over a wide frequency range. The pulse count and the timer count can be captured respectively utilizing a pulse counter and a timer. The pulse frequency generally comprises a frequency of an input pulse signal, such that the pulse frequency is determined based on an accuracy dependent only upon a reference timer clock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.