Recalibration of source synchronous systems
US10103718B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2017 |
| Grant date | Oct 16, 2018 |
| Priority date | — |
| Expiry date | Apr 5, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0037
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An example method of calibrating a source-synchronous system includes: performing initial calibration of a source-synchronous receiver, which is configured to receive data signals and a strobe, to determine an initial strobe delay and initial data delays; setting a strobe delay circuit that delays the strobe to have the initial strobe delay and data delay circuits that delay the data signals to have the initial data delays; measuring first data eye margins of the data signals at a first time; calculating metrics for the data signals based on the first data eye margins; and measuring second data eye margins of the data signals at a second time; and updating the data delay circuits and the strobe delay circuit based on the second data eye margins and the metrics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.