High capacity submicro-winchester fixed disk drive
US5255136A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1991 |
| Grant date | Oct 19, 1993 |
| Priority date | — |
| Expiry date | Jun 4, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/151
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A miniature disk drive achieves storage densities of at least approximately 1700 tracks per inch per storage surface of a storage disk defining a series of radially extensive servo sectors embedded within circumferential zones of data tracks. The sectors are recorded at a constant data transfer rate while each zone has a data transfer rate adapted to disk radius. The drive includes a head and head positioner, a read preamplifier for amplifying analog signals read from, and for amplifying signals to be written to, a storage surface. A circuit board carries drive electronics including a read channel, a servo processing circuit for recovering head location information from the servo sectors, a data block sequencer for sequencing data blocks between a buffer and the storage surface, a buffer memory controller for controlling the buffer, a bus level interface circuit for transferring data blocks between the buffer and a host computer, and a programmed digital controller which functions within a head position servo loop and which also controls the sequencer, buffer controller and bus level interface circuit. As one feature, the servo sectors split data blocks into segments. Segment byte …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.