Magneto-optical recording utilizing signal phase a

专利名称：Magneto-optical recording utilizing signal phase adjustment
发明人：Yoshihiro Tsukamura,Seiji
Kobayashi,Hiroshige Okamura
申请号：US08/086138
申请日：19930701
公开号：US05450381A
公开日：
19950912
专利内容由知识产权出版社提供
摘要：Magneto-optically recorded data can be recorded at high density, such that the data can be overwritten by a simple arrangement and with a small energy. Also, data of high recording density can be accurately recorded and reproduced by a simple arrangement. An alternating field having the same frequency as that of a recording fundamental clock generated by a PLL circuit (8) is generated by a coil (5) that is part of a tank circuit (7) and then applied to a magneto- optical disc (1). A phase of the recording fundamental clock is modulated by a phase modulating circuit (12) in association with recording data and a pulse synchronized with leading edge and trailing edge of such clock is generated by a pulse generating circuit (13). An optical pickup device (4) irradiates the magneto-optical disc (1) with a laser light in synchronism with the pulse. Therefore, a high density recording method in which the edge position of pit is shifted stepwise in association with data to be recorded can be applied to a magneto-optical recording medium.
申请人：SONY CORPORATION
代理机构：Limbach & Limbach
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