Digital player using a pulse width detector
US4562549A · kind A · utility
30Cited by
5References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1982 |
| Grant date | Dec 31, 1985 |
| Priority date | — |
| Expiry date | Oct 13, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/916
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a pulse width detector circuit, a high-level pulse width and a low-level pulse width of a digital signal derived by slicing an analog signal reproduced from a disc at a predetermined level are independently measured and maximum or minimum values thereof in a predetermined time interval are stored, and an average value, sum or difference of the maximum or minimum high-level pulse width and the maximum or minimum low-level pulse width is calculated to detect a correct pulse width of original data recorded on the disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.