Miniature disk drive with spin motor control system
US5442266A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1993 |
| Grant date | Aug 15, 1995 |
| Priority date | — |
| Expiry date | Sep 14, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B25/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a disk drive information storage device having a housing and a disk means for recording and reproducing information. The disk drive information storage device utilizes a spin motor control system having a start-up control circuit which includes a counter and is programmable to accommodate for changing system parameters. The start-up control circuit does not require an external capacitor and provides stable generation of the start-up pulses. The spin motor control system also includes a BEMF commutation circuit which operates utilizing digital techniques. The BEMF commutation circuit includes first and second counters that are programmable to accommodate for changing system parameters. In one embodiment, the housing has a first external dimension of about 51 mm. In another embodiment, the disk means has a diameter in the range of from about 45 mm to about 50 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.