Signal comparison system and method for detecting and correcting timing errors
US6420915B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 2001 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Mar 15, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0337
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A signal comparison system determines whether a data signal is transitioning close to transitions of its clock signal, thereby causing possible errors in the sampling of the data signal. The signal comparison system includes a plurality of latches that receive a first signal and a second signal and that transmit a respective value of the first signal in response to a transition of the second signal. Delay mechanisms delay the transition of the second signal before the transition is received by latches so that the transition is delayed different amounts relative to each of the latches. A feedback mechanism receives the values transmitted by the latches and determines whether these values are logically equivalent. The feedback mechanism then transmits a feedback signal in response to a determination that one of the values is logically different than another of the values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.