Method and apparatus for data window centering ina multifrequency data separator
US4829545A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1986 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Aug 25, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M5/12
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method for data window centering a multifrequency data separator (12) based on having the frequency of a voltage-controlled oscillator (20) at least twice that of read data window frequency, and setting delay of a delay line (14) used in the data separating process so that arriving raw data pulses will be more accurately assigned to their corresponding windows. The method is realized by providing the multifrequency data separator with a phase comparator emulator (30) and a counter (28). According to another embodiment, the apparatus comprises a counter (28b) combined with a delay setting logic unit (40). The method and apparatus described above result in window centering which does not essentially depend on timing characteristics of circuitry used in the construction of the data separator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.