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    • 4. 发明申请
    • Brushless motor and disk drive device using the same
    • 无刷电机和磁盘驱动器使用相同
    • US20060022621A1
    • 2006-02-02
    • US11194742
    • 2005-08-02
    • Naoki MineEiji Miyamoto
    • Naoki MineEiji Miyamoto
    • H02P7/08
    • H02K29/08G11B19/26G11B19/28H02K29/10
    • A brushless motor according to the present invention provided with a recording disk in a rotational member and serving to rotate the recording disk together with the rotational member comprises a first position detecting means for detecting a rotational position of the rotational member, a second position detecting means for detecting a rotational position of the recording disk, wherein a mode for rotating the rotational member at a high speed by a detection signal of the first position detecting means and a mode for rotating the rotational member at a low speed by a detection signal of the second position detecting means are generated. Thereby, the two rotation states whose rotation speeds are different can be obtained in a simplified constitution.
    • 根据本发明的无刷电动机设置有旋转构件中的记录盘并用于使记录盘与旋转构件一起旋转包括用于检测旋转构件的旋转位置的第一位置检测装置,第二位置检测装置 用于检测记录盘的旋转位置,其中通过第一位置检测装置的检测信号高速旋转旋转构件的模式以及通过第一位置检测装置的检测信号以低速旋转旋转构件的模式 产生第二位置检测装置。 由此,可以以简化的结构获得转速不同的两个旋转状态。
    • 9. 发明授权
    • Semiconductor memory device with an improved substrate back-bias
arrangement
    • 具有改进的衬底背偏置布置的半导体存储器件
    • US4985869A
    • 1991-01-15
    • US375492
    • 1989-07-05
    • Eiji Miyamoto
    • Eiji Miyamoto
    • G05F3/20G11C11/4074
    • G11C11/4074G05F3/205
    • A substrate back bias voltage generator of a dynamic type RAM is provided with a first voltage generator having a relatively large current supply capacity, a second voltage generator having a relatively small current supply capacity, and a substrate back bias voltage detecting circuit for controlling operation of the first voltage generator. For example, when the dynamic type RAM is in a CAS before RAS refresh mode, the operation of the first voltage generator is limited selectively, and the operation of the second voltage generator and the substrate back bias voltage detecting circuit is stopped selectively.
    • 具有动态型RAM的基板背偏置电压发生器具有:具有较大的电流供应能力的第一电压发生器,具有相对小的电流供应能力的第二电压发生器,以及用于控制运行的基板背偏置电压检测电路 第一电压发生器。 例如,当动态型RAM处于&upbar&C before&upbar&R refresh模式时,选择性地限制第一电压发生器的操作,并且选择性地停止第二电压发生器和衬底背偏置电压检测电路的操作。