Differential time sampling circuit
US6674309B1 · kind B1 · utility
3Cited by
5References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2002 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Nov 12, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0995
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for measuring and controlling the phase difference or time difference between two signals is presented. In some embodiments two sample and hold (S/H) circuits are arranged as a cooperating system that alternately samples a first signal using the second as a reference. Chopping may be used at the input or output of the S/H circuits. In some embodiments, accurate measurement of digital signal phase differences, such as between two square waves, is obtained without the problems associated with traditional pulse-generation techniques that fail at high frequencies and short pulse lengths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.