Title:
DISCOID MAGNETIC RECORDING MEDIUM
Document Type and Number:
Japanese Patent JPS6437774
Kind Code:
A
Abstract:
PURPOSE:To satisfactorily read a servo identification signal by obtaining the servo identification signal of a neighboring servo identification signal recording part as a mutually different frequency. CONSTITUTION:A servo signal recording area 4 and an information signal recording area 3 are mutually provided along a revolving direction on a recording surface 1 of a medium and in the servo signal recording area 4, a servo identification signal recording part 6 is provided to identify a servo signal. Then, for this servo identification signal recording part 6, the frequencies of the servo identification signals of respective recording parts 5 and 6, which are neighbored in a disk diameter direction, are made different mutually. Thus, even when the servo identification signals of the two servo identification signal recording parts, which are neighbored, are simultaneously read, an interference is not generated between these two servo identification signals and the signals can be satisfactorily read with being respectively independent.
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Inventors:
SATO TSUGUO
YAMASHITA YOSHIHIDE
YAMASHITA YOSHIHIDE
Application Number:
JP19306387A
Publication Date:
February 08, 1989
Filing Date:
August 01, 1987
Export Citation:
Assignee:
SONY CORP
International Classes:
G11B21/10; (IPC1-7): G11B21/10
Domestic Patent References:
| JPS63173280A | 1988-07-16 | |||
| JPS647389A | 1989-01-11 |
Attorney, Agent or Firm:
Akira Koike