Track accessing circuitry for a disk file with switchable filter
US4096534A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1977 |
| Grant date | Jun 20, 1978 |
| Priority date | — |
| Expiry date | Apr 12, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5547
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Circuitry for providing a high speed access by a swingable arm and a transducer carried thereby across a plurality of tracks on a rotatable data storage device to a target track on the rotatable device including a speed indicating circuit connected with the transducer for indicating the speed of the transducer in crossing tracks on the rotatable device and a switchable filter effectively between the transducer and said speed indicating circuit which has a high roll off as the transducer crosses the tracks at a high speed and has a low roll off as the transducer approaches the target track at a relatively low speed so as to thereby cause the speed indicating circuit to accurately indicate the speed of the transducer in moving across the tracks of the rotatable device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.