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1. 发明授权

US5365508A Magneto-optical read/write device 失效
标题翻译：磁光读写装置
公开(公告)号：US5365508A
公开(公告)日：1994-11-15
申请号：US154133
申请日：1993-11-18
申请人： Johannus L Bakx
发明人： Johannus L Bakx
IPC分类号： G11B11/10 , G11B11/105 , G11B20/24 , G11B11/12
CPC分类号： G11B11/10597
摘要： A magneto-optical read/write device having a radiation detection system which includes two radiation-sensitive detectors the outputs of which are connected via DC coupled current-to-voltage converters to an input of an adder circuit and an input of a subtracter circuit to obtain a sum signal and a difference signal. The sum signal on the output of the adder circuit is coupled to an input of a selection circuit via a capacitive coupling. The difference signal on the output of the subtracter circuit is coupled to another input of the selection circuit. The output of the selection circuit is coupled to a signal processing circuit via another capacitive coupling. The device is particularly suited for use with a magneto-optical record carrier having sector headers with a pre-arranged pit structure. When information areas between the sector headers are recorded and erased, the device maintains the intensity level at a constant read level during scanning of the sector headers and avoids production of undesired transition phenomena at the output of the selection circuit.
摘要翻译：一种具有放射线检测系统的磁光读/写装置，其包括两个辐射敏感检测器，其输出端通过直流耦合电流 - 电压转换器连接到加法器电路的输入端和减法器电路的输入端获得和信号和差分信号。加法器电路的输出上的和信号通过电容耦合耦合到选择电路的输入端。减法器电路的输出上的差分信号耦合到选择电路的另一个输入端。选择电路的输出通过另一个电容耦合耦合到信号处理电路。该装置特别适用于具有预定凹坑结构的扇区头部的磁光记录载体。当记录和擦除扇区头部之间的信息区域时，器件在扫描扇区头部期间将亮度水平维持在恒定的读取电平，并避免在选择电路的输出端产生不需要的转换现象。

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