Apparatus and method for digitally synchronizing the timing of a sequence of electrical output pulses in accordance with a selectable, permissably non-linear function of the timing of a sequence of electrical input pulses
US4245264A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1979 |
| Grant date | Jan 13, 1981 |
| Priority date | — |
| Expiry date | Jul 19, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10212
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for implementing the same are provided for digitally synchronizing the timing of a sequence of electrical output pulses in accordance with a selectable, permissably non-linear function of the timing of a sequence of electrical input pulses. The method and apparatus are illustrated with reference to application thereof to overcoming the problem of degradation of synchronization caused by so-called "peak shift" due to the adjacent data effect in the reading of binary data stored on magnetic disks or the like. Pulses of a timing reference signal having a uniform interval equal to a sub-multiple of the normal average interval of the desired output pulses are continuously counted to a number base equal to the denominator of said sub-multiple, and output pulses are produced whenever a pre-selected count value occurs. Output pulse timing correction values in accordance with the synchronizing function selected are stored in memory. A parameter of the input pulse sequence representing the occurrence of a new pulse therein is sensed and triggers substitution for the then existing count of the correction value accessed from memory at the address represented by the count…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.