Driver circuit for a voice coil motor in a disk drive system
US6639373B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2001 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | Sep 28, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/034
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides an apparatus and system (300) supplying a regulated voltage of sufficient magnitude to enable de-latching of a head carriage from a latching device. In at least one embodiment, providing a voltage source for the voice coil motor (14) includes a regulator (310) having an input for receiving a first voltage potential and operably configured to provide a second voltage potential to an output selectively coupled to the voice coil motor (14) by a switch (345). A current source (315) is operably configured to provide a predetermined limited current via a pass transistor (325) associated with the regulator is also included. Further included is a capacitor (335) coupled to the regulator output and operably configured for charging by the current source via the current limited pass transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.