Jitter measurement apparatus and its method
US6598004B1 · kind B1 · utility
22Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2000 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Aug 3, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/31903
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A signal under measurement is converted into a digital signal by an AD converter, and a band-pass filtering process is applied to the digital signal to take out only components around a fundamental frequency of the signal under measurement. A data around a zero-crossing of the components around the fundamental frequency is interpolated to estimate a timing close to a zero-crossing point. A difference between adjacent timings in the estimated zero-crossing timing sequence is calculated to obtain an instantaneous period data sequence. A period jitter is obtained from the instantaneous period data sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.