Interpolation delay cell for 2ps resolution jitter injector in optical link transceiver
US6958640B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2003 |
| Grant date | Oct 25, 2005 |
| Priority date | — |
| Expiry date | Jan 24, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/372
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for generating signals with improved timing resolution includes a delay cell configured to receive dual coupled differential input signals. The delay cell performs an interpolation function which smooths state transitions or other discontinuities that result from timing or phase offsets between the input signals. The interpolation function is performed by resistors which couple respective components of the differential inputs prior to traversing delay paths. A delay cell of this type has high supply noise rejection and a low output swing range, thereby making it suitable for a number of applications. One application includes a jitter noise generator which uses the delay cell to achieve improved timing resolution and which is not limited by a minimum delay of the cell. Another application uses the delay cell to form a coupled delay line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.