Method and apparatus for high-precision measurement of frequency
US7313491B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2006 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Feb 18, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R23/15
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for measuring the frequency of a cyclically-repeating electrical signal by: passing the electrical signal through a network of sequentially-activated gates, in which the first gate detects the leading edge of each cycle of the electrical signal, and each of the remaining gates, when activated, applies a predetermine propagation delay to the detected leading edges; determining the gates which were activated at the beginning, and at the end, of a predetermined time window; determining the difference in the total propagation delays at the outputs of the activated gates; and utilizing the differences in the total propagation delays in determining the frequency of the electrical signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.