Noise compensation device and method in a discrete time control system
US6492926B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 19, 2001 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Nov 19, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/24
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A noise compensating device in a discrete time control system, such as a R/W system for hard disks, including: a control loop generating a first timing signal, a signal indicative of a quantity to be controlled, and a control signal, which have a first frequency; and an open loop control line which generates a compensation signal synchronous with the control signal and includes a sensor. The sensor includes a sensing element, generating an analog signal, an acquisition stage, connected to the sensing element and generating a disturbance measure signal correlated to the analog signal and synchronous with the control signal, and a synchronization stage. The synchronization stage includes a frequency generator having an input receiving the first timing signal and a first and a second output connected to the acquisition stage and generating, respectively, a second timing signal and a third timing signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.