Optical modules and methods of making the optical modules
US6979810B2 · kind B2 · utility
5Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2001 |
| Grant date | Dec 27, 2005 |
| Priority date | — |
| Expiry date | Mar 9, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/091
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A sample & hold type phase detector is used in a CDR IC and, in jitter transfer bandwidth adjustment, VCO output waveforms 90° out of phase with each other can be inputted to the phase detector, whereby a jitter transfer bandwidth can be calculated by only the measurement of frequency and of a DC voltage and it is possible to make a jitter transfer bandwidth adjustment in DC test for IC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.