Tracking servo system for magnetic recording and reproducing apparatus using flexible magnetic disk
US4551777A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1982 |
| Grant date | Nov 5, 1985 |
| Priority date | — |
| Expiry date | Aug 11, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59633
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A tracking servo system for a magnetic recording and reproducing apparatus uses a flexible magnetic disk having thereon at least first, second and third tracks each of which includes a data track portion and a pair of servo track portions located on both sides of the data track portion. Tracking signals having different frequencies are recorded on the first, second and third servo track pairs. Servo and data heads are formed in a unitary structure. When the data head records an information signal on the second data track portion or reads out the recorded information signal therefrom, the servo head reads out the tracking signals recorded on the first and third servo track portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.