Digital modulation signal reading device
US4540897A · kind A · utility
21Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1983 |
| Grant date | Sep 10, 1985 |
| Priority date | — |
| Expiry date | Jun 27, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10527
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data reading device for reading out data modulated according to a system wherein the time ratio of low to high level signals is substantially unity employs a time ratio detector and an intermediate level detector. A comparator compares the reproduced output level with a synthesized signal which may represent a combination of the outputs of the time ratio detector and the intermediate level detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.