Magnetic playback apparatus having immunity to skew
US4330807A · kind A · utility
1Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 26, 1980 |
| Grant date | May 18, 1982 |
| Priority date | — |
| Expiry date | Jun 26, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0013
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
By dimensioning a magnetic playback head so that it coacts with a magnetic signal track having an effective width that is less than one half the shortest signal wavelength to be played back divided by the tangent (or sine) of a predetermined magnetic skew angle that may be experienced by the head, skew angles less than the maximum skew angle will have no effect on the playback of signals having wavelengths greater than said shortest wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.