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公开(公告)号:US06424492B1
公开(公告)日:2002-07-23
申请号:US09556534
申请日:2000-04-24
IPC分类号: G11B1902
CPC分类号: G11B23/0302 , G11B19/12
摘要: A data storage disk having a latent illuminance discrimination marker for determining whether the data storage disk is suitable for use in a disk drive. A light source illuminates the marker and the marker emits illuminance, preferably as phosphorescence. A detector detects the emitted illuminance, and a predetermined characteristic of the marker in the frequency domain is determined. The frequency domain response may be either a phase response or an amplitude response, or both. The frequency domain response provides identification of different types or generations of data storage disks or provides a secure keying mechanism for authorized access to proprietary software.
摘要翻译: 具有用于确定数据存储盘是否适用于磁盘驱动器的潜在照度辨别标记的数据存储盘。 光源照亮标记,标记物发射光,优选为磷光。 检测器检测发射的照度,并且确定频域中的标记的预定特性。 频域响应可以是相位响应或振幅响应,或两者。 频域响应提供不同类型或代数据的数据存储磁盘的识别,或提供用于授权访问专有软件的安全密钥机制。
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公开(公告)号:US5920266A
公开(公告)日:1999-07-06
申请号:US239999
申请日:1994-05-09
申请人: Robert D. Allgood , Glenn B. Dixon
发明人: Robert D. Allgood , Glenn B. Dixon
IPC分类号: H04Q3/00
CPC分类号: G06F13/4086
摘要: A link detection circuit automatically terminates SCSI data transmission lines by use of a sense circuit which detects the absence or presence of an adjoining device or devices. The lines are automatically terminated at the ends with no user intervention. Wrong input/output cabling is precluded by use of a bi-directional link detection circuit. Detection is done without adding signal lines or disturbing buss functionality.
摘要翻译: 链路检测电路通过使用检测相邻设备或设备的不存在或存在的检测电路来自动终止SCSI数据传输线。 线路自动终止,无需用户干预。 使用双向链路检测电路可以防止输入/输出布线错误。 无需增加信号线或干扰总线功能即可完成检测。
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