Magnetic recording and reproducing apparatus arranged to save electric power consumed in detecting tape end and reduce load on microprocessor
US6141172A · kind A · utility
1Cited by
2References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1999 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | Dec 9, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/087
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording and reproducing apparatus arranged to use a magnetic tape. The apparatus operates to derive the current taken-up position of the magnetic tape from the signals that are proportional to the rotation frequencies of a capstan motor, a supply reel and a take-up reel. Only when the taken-up position is near the tape end, the apparatus activates LEDs (light emitting elements) for sensing the tape end and photo-transistors (light receiving elements), for sensing the tape end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.