Title:
【発明の名称】高密度記録媒体及びその記録再生装置
Document Type and Number:
Japanese Patent JP2923190
Kind Code:
B2
Abstract:
A probe (6) is displaced relative to a recording medium (8) according to a drive voltage. A chip (7) is provided at an end of the probe (6). The chip (9) serves to form pits and projections on a surface of the recording medium (8) according to a recording voltage (Vp2) and serves to output a current signal responsive to the pits and projections with a reproducing voltage (Vp1) applied. A voltage generator (14, 15) generates the recording voltage and the reproducing voltage based on address and data signals. A sample-hold unit (20, 21) samples at a specified frequency a current signal obtained from a no-recording area (9) of the recording medium by the chip (7) and produces an output voltage signal. A reproducing unit (16) demodulates and reproduces increment and decrement of the current signal obtained from a recording area (10) of the recording medium by the chip (7). A control unit (22) controlles recording and reproduction. The control unit outputs such a drive voltage that the interval between the chip (7) and the recording medium (8) is maintained constant by feedback control based on the voltage signal derived from the sample-hold unit (20, 21). The control unit controlles the recording so that no-recording areas (9) and recording areas (10) are arranged alternately.
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Inventors:
INUI TETSUYA
MATOBA KOJI
HIRATA SUSUMU
ISHII YORISHIGE
OOTA KENJI
MATOBA KOJI
HIRATA SUSUMU
ISHII YORISHIGE
OOTA KENJI
Application Number:
JP31612493A
Publication Date:
July 26, 1999
Filing Date:
December 16, 1993
Export Citation:
Assignee:
SHAAPU KK
International Classes:
G11B9/14; G01Q60/12; G11B9/00; (IPC1-7): G11B9/00; G11B9/04
Domestic Patent References:
| JP4125830A | ||||
| JP4324140A |
Attorney, Agent or Firm:
Takaya Koike