Calibration of clock signal for data transmission
US9477259B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2015 |
| Grant date | Oct 25, 2016 |
| Priority date | — |
| Expiry date | Feb 27, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/08
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for calibration of a clock signal used in data transmission is disclosed. The method includes a calibration having coarse and fine grain procedures. The coarse grain procedure begins from the center of a current eye and performs reads while decrementing the delay provided to the clock signal until at least one bit fails. This is repeated, from the center of the eye, incrementing until again at least one bit fails. The lower and upper last passing points are recorded. A fine grain procedure includes performing reads while decrementing, from the lower last passing point, recording points at which each bit fails until all fail. The fine grain procedure further includes incrementing, from the upper last passing point, recording points at which each bit fails until fail. Thereafter, a clock delay corresponding to the center of the new eye is determined based on the calibration data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.