Disc drive spindle motor with programmable current control
US6011375A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1997 |
| Grant date | Jan 4, 2000 |
| Priority date | — |
| Expiry date | Nov 26, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disc drive includes an apparatus for limiting coil energization current to a programmable value. A current sensor is operatively coupled to a coil and provides a signal which is indicative of current flow through the coil. A configurable voltage source is responsive to a control signal. A current inhibitor is operatively coupled to the output of the current sensor and the voltage source such that the current inhibitor selectively inhibits current flow through the coil based on results of a comparison between the current sensor signal and a voltage supplied by the configurable voltage source. A method of calibrating a current control threshold is also provided as well as a method of controlling the coil energization current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.