Magnetio optical disk recording device capable of verifying reco

Details Magnetio optical disk recording device capable of verifying reco Magnetio optical disk recording device capable of verifying reco

1997-07-22

1998-05-12

Young, W. R.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 58, 369110, G11B 700

Patent

active

057516774

ABSTRACT:
The magneto-optical disk recording device disclosed is for recording and reproduction using a one-beam optical head and includes a magneto-optical head, a reproduction amplifier, a recording data delay circuit, a recording state detection circuit, a data comparator circuit, and a record judging circuit. The reproduction amplifier amplifies a magneto-optical reproduction signal read out by the magneto-optical head during the recording. The recording data delay circuit delays a recording data for a predetermined period of time. The recording state detection circuit receives the reproduction signal from the reproduction amplifier and detects a reproduced signal state during the recording. The data comparator circuit receives and compares an output of the recording data delay circuit and an output of the recording state detection circuit, and outputs a record failure signal. The record judging circuit judges whether to skip a record failure region or to verify a recorded state of the data when the record failure signal is outputted from the data comparator circuit. The arrangement enables the verification operation during the recording to be made simple thereby enhancing a recording speed.

REFERENCES:
patent: 4648085 (1987-03-01), Shimomou
patent: 4727531 (1988-02-01), Ito et al.
patent: 4924330 (1990-05-01), Seamons et al.
patent: 5341359 (1994-08-01), Birukawa et al.
patent: 5428586 (1995-06-01), Kobayashi et al.
patent: 5517471 (1996-05-01), Ashinuma et al.

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