Ternary magnetic recording and reproducing system with simultaneous overwrite
US4482927A · kind A · utility
12Cited by
4References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1982 |
| Grant date | Nov 13, 1984 |
| Priority date | — |
| Expiry date | Jan 15, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1488
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A saturated flux equivalent to three amplitude level recording is attained by recording two levels by conventional saturation of the medium and the third level by writing a high frequency which erases old data and is read back as a zero level due to limited playback or read frequency response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.