Constant wavelength magnetic recording
US4115786A · kind A · utility
2Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1976 |
| Grant date | Sep 19, 1978 |
| Priority date | — |
| Expiry date | Dec 3, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/40025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Constant wavelength magnetic imaging is provided by generating a signal having a frequency proportional to the speed of a rotational recording member, multiplying that frequency up to a higher, desired recording frequency, and phase-locking the higher frequency signal to the unmultiplied lower frequency, thus synchronizing the recording frequency with the motor speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.