Method for using a minimum latency loop for a synchronization system in a hard disk drive
US7446968B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2005 |
| Grant date | Nov 4, 2008 |
| Priority date | — |
| Expiry date | Oct 3, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0029
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The method and architecture improve the robustness of a synchronization system through a minimum latency loop, for Hard Disk Drives (HDD), for example, wherein synchronous detection processing is performed for timing recovering of a correct sampling phase and frequency and by a first acquisition step of a known preamble signal pattern, for generating a timing periodic signal, followed by a second tracking step, for recovering phase, frequency and gain sampling errors of the synchronization signal including a header followed by an unknown data content. Advantageously, a feedback loop including a numeric preamble generator (NPG) is provided for obtaining a reduced latency in the acquisition phase. The NPG stores preamble values for different phase offset.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.