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1. 发明授权

US06909572B2 Disk drive system and method for operating same 有权
标题翻译：磁盘驱动器系统及其操作方法
公开(公告)号：US06909572B2
公开(公告)日：2005-06-21
申请号：US10431336
申请日：2003-05-07
申请人： Gianluca Ventura , Alberto Salina , Alessandra Schenone , Fabio Ramaioli , Luca Anostini
发明人： Gianluca Ventura , Alberto Salina , Alessandra Schenone , Fabio Ramaioli , Luca Anostini
IPC分类号： G11B5/00 , G11B5/012 , G11B5/54 , G11B5/55 , G11B21/12 , G11B21/02
CPC分类号： G11B5/012 , G11B5/54 , G11B5/553 , G11B21/12 , G11B2005/001
摘要： A disk drive system is described which includes a disk having a magnetic surface and a motor for rotating the disk, a magnetic head being movable relative to said magnetic surface. The motor generates a back electromotive force voltage having different phases and the system comprising a plurality of switches for switching the back electromotive force voltage, a control circuit to control the plurality of switches to supply the back electromotive force voltage to direct the head to a parking position. The system also comprises a comparator adapted to compare a single phase of the back electromotive force voltage with the sum of the other phases of the back electromotive force voltage. The comparator generates an output signal representative of the comparation and the system comprises a logic block controlled by the output signal of the comparator. The logic block is adapted to determine time periods and a control sequence of the switches which is associated to the time periods. The control sequence is supplied to the control circuit so that the last generates control signals to control the plurality of switches.
摘要翻译：描述了一种磁盘驱动器系统，其包括具有磁性表面的盘和用于旋转盘的马达，磁头可相对于所述磁性表面移动。电动机产生具有不同相位的反电动势电压，并且系统包括用于切换反电动势电压的多个开关，控制电路以控制多个开关以提供反电动势电压以将头引导到停车位置。该系统还包括比较器，用于将反电动势电压的单相与反电动势电压的其它相位之和进行比较。比较器产生表示比较的输出信号，并且系统包括由比较器的输出信号控制的逻辑块。逻辑块适于确定与时间段相关联的时间段和开关的控制序列。控制序列被提供给控制电路，使得最后一个产生控制信号以控制多个开关。

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