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1. 发明授权

US07023653B2 Floppy disk apparatus 失效
标题翻译：软盘装置
公开(公告)号：US07023653B2
公开(公告)日：2006-04-04
申请号：US11076306
申请日：2005-03-09
申请人： Seiji Takenaka , Takuya Ishida
发明人： Seiji Takenaka , Takuya Ishida
IPC分类号： G11B5/596
CPC分类号： G11B19/20 , G11B20/10222 , G11B2220/2512
摘要： A floppy disk apparatus improves power efficiency and quietness by commencing rotation of a stepping motor in a smooth fashion. The floppy disk apparatus includes an interface control circuit that outputs, in accordance with an instruction from a host apparatus, a first step pulse signal, step pulse period signals that indicate the period of the first step pulse signal and that are output before the first step pulse signal and a direction signal, and a floppy disk control circuit that generates a second step pulse signal delayed by a predetermined time from the first step pulse signal in accordance with the step pulse period signal, that generates a first signal that toggles in synchronization with the first step pulse signal and a second signal that toggles in synchronization with the second step pulse signal, and that outputs the first and second signals as control signals in accordance with the direction signal.
摘要翻译：软盘设备通过以平滑的方式开始步进电机的旋转来提高功率效率和安静性。该软盘装置包括接口控制电路，其根据来自主机装置的指令输出第一步骤脉冲信号，指示第一步骤脉冲信号的周期并在第一步骤之前输出的步进脉冲周期信号脉冲信号和方向信号;以及软盘控制电路，其根据步进脉冲周期信号，从第一阶跃脉冲信号产生延迟预定时间的第二步进脉冲信号，该步骤脉冲周期信号产生与第一步骤脉冲信号同步切换的第一信号所述第一阶跃脉冲信号和与所述第二步进脉冲信号同步地切换的第二信号，并且根据所述方向信号输出所述第一和第二信号作为控制信号。

2. 发明授权

US07233454B2 Floppy disk control circuit and floppy disk apparatus 失效
标题翻译：软盘控制电路和软盘装置
公开(公告)号：US07233454B2
公开(公告)日：2007-06-19
申请号：US11075787
申请日：2005-03-09
申请人： Seiji Takenaka
发明人： Seiji Takenaka
IPC分类号： G11B15/46 , H02P5/00
CPC分类号： G11B19/2054
摘要： A floppy disk control circuit enables a floppy disk apparatus to operate at high speed while current consumption is suppressed to no more than 500 mA, i.e. the maximum allowed current of an apparatus using a USB interface. The floppy disk control circuit outputs a reference clock to a spindle motor drive circuit that drives the spindle motor in accordance with the reference clock to rotate a floppy disk. The floppy disk control circuit outputs a slow reference clock for a low rotational speed corresponding to the maximum allowed current at the commencement of the start-up of rotation of the floppy disk and outputs a fast reference clock for a high rotational speed after lapse of a predetermined time from the commencement of the start-up of rotation.
摘要翻译：软盘控制电路使得软盘设备能够以高速操作，同时将电流消耗抑制到不超过500mA，即使用USB接口的设备的最大允许电流。软盘控制电路根据参考时钟向主轴电动机驱动电路输出参考时钟，以旋转软盘。软盘控制电路在软盘启动开始时输出对应于最大允许电流的低旋转速度的慢速参考时钟，并在经过一段时间之后输出用于高旋转速度的快速参考时钟从开始启动旋转开始的预定时间。

3. 发明申请

US20050201004A1 Floppy disk apparatus 失效
标题翻译：软盘装置
公开(公告)号：US20050201004A1
公开(公告)日：2005-09-15
申请号：US11076306
申请日：2005-03-09
申请人： Seiji Takenaka , Takuya Ishida
发明人： Seiji Takenaka , Takuya Ishida
IPC分类号： G11B20/14 , G11B5/596 , G11B20/10 , G11B21/08
CPC分类号： G11B19/20 , G11B20/10222 , G11B2220/2512
摘要： A floppy disk apparatus improves power efficiency and quietness by commencing rotation of a stepping motor in a smooth fashion. The floppy disk apparatus includes an interface control circuit that outputs, in accordance with an instruction from a host apparatus, a first step pulse signal, step pulse period signals that indicate the period of the first step pulse signal and that are output before the first step pulse signal and a direction signal, and a floppy disk control circuit that generates a second step pulse signal delayed by a predetermined time from the first step pulse signal in accordance with the step pulse period signal, that generates a first signal that toggles in synchronization with the first step pulse signal and a second signal that toggles in synchronization with the second step pulse signal, and that outputs the first and second signals as control signals in accordance with the direction signal.
摘要翻译：软盘设备通过以平滑的方式开始步进电机的旋转来提高功率效率和安静性。该软盘装置包括接口控制电路，其根据来自主机装置的指令输出第一步骤脉冲信号，指示第一步骤脉冲信号的周期并在第一步骤之前输出的步进脉冲周期信号脉冲信号和方向信号;以及软盘控制电路，其根据步进脉冲周期信号，从第一阶跃脉冲信号产生延迟预定时间的第二步进脉冲信号，该步骤脉冲周期信号产生与第一步骤脉冲信号同步切换的第一信号所述第一阶跃脉冲信号和与所述第二步进脉冲信号同步地切换的第二信号，并且根据所述方向信号输出所述第一和第二信号作为控制信号。

4. 发明申请

US20050200999A1 Floppy disk control circuit and floppy disk apparatus 失效
标题翻译：软盘控制电路和软盘装置
公开(公告)号：US20050200999A1
公开(公告)日：2005-09-15
申请号：US11075787
申请日：2005-03-09
申请人： Seiji Takenaka
发明人： Seiji Takenaka
IPC分类号： G11B19/00 , G11B15/46 , G11B19/20 , G11B19/247 , G11B19/28 , H02P1/04
CPC分类号： G11B19/2054
摘要： A floppy disk control circuit enables a floppy disk apparatus to operate at high speed while current consumption is suppressed to no more than 500 mA, i.e. the maximum allowed current of an apparatus using a USB interface. The floppy disk control circuit outputs a reference clock to a spindle motor drive circuit that drives the spindle motor in accordance with the reference clock to rotate a floppy disk. The floppy disk control circuit outputs a slow reference clock for a low rotational speed corresponding to the maximum allowed current at the commencement of the start-up of rotation of the floppy disk and outputs a fast reference clock for a high rotational speed after lapse of a predetermined time from the commencement of the start-up of rotation.
摘要翻译：软盘控制电路使得软盘设备能够以高速操作，同时将电流消耗抑制到不超过500mA，即使用USB接口的设备的最大允许电流。软盘控制电路根据参考时钟向主轴电动机驱动电路输出参考时钟，以旋转软盘。软盘控制电路在软盘启动开始时输出对应于最大允许电流的低旋转速度的慢速参考时钟，并在经过一段时间之后输出用于高旋转速度的快速参考时钟从开始启动旋转开始的预定时间。

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