Dead track acquisition for phase-locked loop control
US4949197A · kind A · utility
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10References
8Claims
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Key dates
| Filing date | Sep 8, 1988 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Sep 8, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/3027
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved phase-locked loop control having DEAD TRACK acquisition wherein a separate oscillator generates a fixed frequency of digital pulses corresponding to the frequency of the data board in the storage media and, in the event of a DEAD TRACK in the storage media, the phase-locked loop control locks onto the fixed frequency output of the oscillator to insure lock during DEAD TRACK integral.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.