Method and apparatus for measuring the phase of captured read data
US6509762B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2002 |
| Grant date | Jan 21, 2003 |
| Priority date | — |
| Expiry date | Aug 8, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2207/2281
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided for capturing data read from a memory device that is aligned with respect to a clock strobe signal originating from the memory device, which has constraints with respect to a local clock signal supplied to the memory device. The apparatus includes a circuit for capturing the data read from the memory device relative to the clock strobe signal to produce captured read data, a circuit for latching the captured read data relative to a sample clock signal, and a circuit for measuring a phase difference between the sample clock signal and the clock strobe signal and adjusting a phase of the sample clock signal as a function of the phase difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.