发明名称 |
Method and apparatus for encoding and direct overwriting of magneto-optic data |
摘要 |
Direct overwrite of data on magneto-optic medium is described. Old data is erased and new data is written during a single rotation of the media in a data storage system which includes a resonant coil for producing a high frequency alternating magnetic field interacting with laser pulses having a duration equal to a small fraction of the period of the magnetic field. Variable-length magnetic domains are formed by overlapping circular magnetic domains to provide pulse width modulation (PWM) encoding of data.
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申请公布号 |
US4872078(A) |
申请公布日期 |
1989.10.03 |
申请号 |
US19870130813 |
申请日期 |
1987.12.09 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
GERBER, ULRICH G.;RUGAR, DANIEL |
分类号 |
G11B11/105 |
主分类号 |
G11B11/105 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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