Patent · US Expired

Magnetic disc, especially a flexible magnetic disc, for track adjustment and amplitude control

US4084201A · kind A · utility

17Cited by

5References

10Claims

0Family size

Assignee

BASF SE

Inventors

Joachim Hack · Ludwigshafen, DE
Udo Himmelmann
Peter Rudolf · Ludwigshafen, DE
Klaus Schulze-Berge · Ludwigshafen, DE
Karl-Heinz Meyer

Key dates

Filing date	Mar 29, 1976
Grant date	Apr 11, 1978
Priority date	—
Expiry date	Mar 29, 1996

Classification

Technology area (CPC G)Physics
CPC primaryG11B33/10
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The invention relates to a magnetic disc for track adjustment and amplitude control having at least one control track with magnetic control signals, this track being arranged in the central region of the recording area, and the control signals consisting of two different signals. The invention also relates to the geometric arrangement of the control signals in the track, their number, their amplitude, their frequency and their duration.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.