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1. 发明授权

US08384324B2 Motor drive circuit 有权
标题翻译：电机驱动电路
公开(公告)号：US08384324B2
公开(公告)日：2013-02-26
申请号：US13010506
申请日：2011-01-20
申请人： Masahiro Nakahata , Toshiyuki Imai
发明人： Masahiro Nakahata , Toshiyuki Imai
IPC分类号： H02P6/16
CPC分类号： H02P6/16 , H02P6/15 , H02P6/34
摘要： A motor drive circuit is configured to drive a motor based on first and second position detection signals opposite in phase to each other, the signals having a frequency corresponding to a rotational speed of the motor and indicating a rotational position of the motor. The circuit includes a first level-shift circuit, a second level-shift circuit, a timing detecting circuit, and an output circuit. The first level-shift circuit is configured to shift a level of at least either one of the first and second position detection signals so that a first period, during which a first output signal corresponding to the first position detection signal is higher in level than a second output signal corresponding to the second position detection signal, becomes longer than a second period, during which the second output signal is higher in level than the first output signal.
摘要翻译：电动机驱动电路被配置为基于彼此相位相反的第一和第二位置检测信号来驱动电动机，该信号具有与电动机的转速相对应的频率并且指示电动机的旋转位置。电路包括第一电平移位电路，第二电平移位电路，定时检测电路和输出电路。第一电平移位电路被配置为移位第一位置检测信号和第二位置检测信号中的至少一个的电平，使得与第一位置检测信号相对应的第一输出信号的电平高于第一位置检测信号的第一周期与第二位置检测信号相对应的第二输出信号变得比第二输出信号的电平高于第一输出信号的第二周期长。

2. 发明授权

US08593100B2 Motor drive circuit 有权
标题翻译：电机驱动电路
公开(公告)号：US08593100B2
公开(公告)日：2013-11-26
申请号：US13091229
申请日：2011-04-21
申请人： Masahiro Nakahata , Toshiyuki Imai
发明人： Masahiro Nakahata , Toshiyuki Imai
IPC分类号： G05B11/28
CPC分类号： H02P7/29
摘要： A motor drive circuit is configured to drive a motor coil based on duty ratio of a PWM signal, and includes a first pulse signal generating circuit configured to generate a first pulse signal for each time period, the time period being equal to 1/n of a time period during which the PWM signal is at one logic level, a counter configured to change a count value based on the first pulse signal, a drive signal output circuit configured to output a drive signal of one logic level when the count value is not a predetermined value and output the drive signal of the other logic level when the count value reaches the predetermined value, a drive circuit configured to perform PWM driving for the motor coil based on the duty ratio of the drive signal, and a setting circuit.
摘要翻译：电动机驱动电路被配置为基于PWM信号的占空比来驱动电动机线圈，并且包括：第一脉冲信号生成电路，被配置为在每个时间段产生第一脉冲信号，所述时间段等于1 / n 其中PWM信号处于一逻辑电平的时间段，被配置为基于第一脉冲信号改变计数值的计数器;驱动信号输出电路，被配置为当计数值不是时输出一个逻辑电平的驱动信号预定值，并且当计数值达到预定值时输出另一逻辑电平的驱动信号;驱动电路，被配置为基于驱动信号的占空比对电动机线圈进行PWM驱动;以及设定电路。

3. 发明申请

US20110260669A1 MOTOR DRIVE CIRCUIT 有权
标题翻译：电机驱动电路
公开(公告)号：US20110260669A1
公开(公告)日：2011-10-27
申请号：US13091229
申请日：2011-04-21
申请人： Masahiro Nakahata , Toshiyuki Imai
发明人： Masahiro Nakahata , Toshiyuki Imai
IPC分类号： H02P7/29
CPC分类号： H02P7/29
摘要： A motor drive circuit to drive a motor coil based on duty ratio of a PWM signal, includes: a first pulse signal generating circuit to generate a first pulse signal for each time period, the time period being equal to 1/n of a time period during which the PWM signal is at one logic level; a counter to change a count value based on the first pulse signal; a drive signal output circuit to output a drive signal of one logic level when the count value is not a predetermined value, and output the drive signal of the other logic level when the count value reaches the predetermined value; a drive circuit to perform PWM driving for the motor coil based on the duty ratio of the drive signal; and a setting circuit to set, in the counter, such a count value as to decrease a current passing through the motor coil, for each period of the PWM signal, in a time period during which the current passing through the motor coil is decreased, and set, in the counter, such a count value as to increase the current passing through the motor coil, for each period of the PWM signal, in a time period during which the current passing through the motor coil is increased, out of a time period during which the current passing through the motor coil is changed in direction.
摘要翻译：基于PWM信号的占空比来驱动电动机线圈的电动机驱动电路包括：第一脉冲信号发生电路，用于在每个时间周期产生第一脉冲信号，该时间段等于时间段的1 / n 在此期间PWM信号处于一个逻辑电平; 计数器，用于根据第一脉冲信号改变计数值; 当所述计数值不是预定值时，驱动信号输出电路输出一个逻辑电平的驱动信号，并且当所述计数值达到所述预定值时输出所述另一个逻辑电平的驱动信号; 基于所述驱动信号的占空比对所述电动机线圈进行PWM驱动的驱动电路; 以及设定电路，在通过所述电动机线圈的电流减少的时间段内，在所述计数器中，对于所述PWM信号的每个周期，在所述计数器中设定这样的计数值，以减小通过所述电动机线圈的电流，并且在计数器中设置这样的计数值，以便在通过电动机线圈的电流增加的时间段内，在PWM信号的每个周期期间增加通过电动机线圈的电流，时间其中通过电动机线圈的电流在方向上改变。

4. 发明申请

US20110181214A1 MOTOR DRIVE CIRCUIT 有权
标题翻译：电机驱动电路
公开(公告)号：US20110181214A1
公开(公告)日：2011-07-28
申请号：US13010506
申请日：2011-01-20
申请人： Masahiro Nakahata , Toshiyuki Imai
发明人： Masahiro Nakahata , Toshiyuki Imai
IPC分类号： H02P6/16
CPC分类号： H02P6/16 , H02P6/15 , H02P6/34
摘要： A motor drive circuit is configured to drive a motor based on first and second position detection signals opposite in phase to each other, the signals having a frequency corresponding to a rotational speed of the motor and indicating a rotational position of the motor. The circuit includes a first level-shift circuit, a second level-shift circuit, a timing detecting circuit, and an output circuit. The first level-shift circuit is configured to shift a level of at least either one of the first and second position detection signals so that a first period, during which a first output signal corresponding to the first position detection signal is higher in level than a second output signal corresponding to the second position detection signal, becomes longer than a second period, during which the second output signal is higher in level than the first output signal.
摘要翻译：电动机驱动电路被配置为基于彼此相位相反的第一和第二位置检测信号来驱动电动机，该信号具有与电动机的转速相对应的频率并且指示电动机的旋转位置。电路包括第一电平移位电路，第二电平移位电路，定时检测电路和输出电路。第一电平移位电路被配置为移位第一位置检测信号和第二位置检测信号中的至少一个的电平，使得与第一位置检测信号相对应的第一输出信号的电平高于第一位置检测信号的第一周期与第二位置检测信号相对应的第二输出信号变得比第二输出信号的电平高于第一输出信号的第二周期长。

5. 发明授权

US08693150B2 Semiconductor apparatus 有权
标题翻译：半导体装置
公开(公告)号：US08693150B2
公开(公告)日：2014-04-08
申请号：US12958256
申请日：2010-12-01
申请人： Kazumasa Akai , Masahiro Nakahata
发明人： Kazumasa Akai , Masahiro Nakahata
IPC分类号： H02H9/00
CPC分类号： H01L27/0285
摘要： A semiconductor apparatus includes: first and second power-supply terminals; an internal circuit connected between the first and second power-supply terminals; and a protection circuit connected in parallel with the internal circuit between the first and second power-supply terminals, the protection circuit including: a series circuit that includes a resistor and a first capacitor, and is connected in parallel with the internal circuit between the first and second power-supply terminals; a first MOS transistor that is connected in parallel with the series circuit, and is controlled according to a voltage at a connection point between the resistor and the first capacitor; and a switch circuit that is connected in parallel with the resistor, is turned on in a delayed manner after a power-supply voltage is applied between the first and second power-supply terminals, and changes the voltage at the connection point so that the first MOS transistor is turned off.
摘要翻译：半导体装置包括：第一和第二电源端子; 连接在第一和第二电源端子之间的内部电路; 以及与所述第一和第二电源端子之间的内部电路并联连接的保护电路，所述保护电路包括：串联电路，包括电阻器和第一电容器，并且在所述第一和第二电源端子之间并联连接所述内部电路和第二电源端子; 与串联电路并联连接的第一MOS晶体管，并根据电阻器与第一电容器之间的连接点处的电压进行控制; 并且与电阻并联连接的开关电路在第一和第二电源端子之间施加电源电压之后以延迟的方式导通，并且改变连接点处的电压，使得第一 MOS晶体管关闭。

6. 发明授权

US08634173B2 Semiconductor apparatus 有权
公开(公告)号：US08634173B2
公开(公告)日：2014-01-21
申请号：US12958256
申请日：2010-12-01
申请人： Kazumasa Akai , Masahiro Nakahata
发明人： Kazumasa Akai , Masahiro Nakahata
IPC分类号： H02H9/00
摘要： A semiconductor apparatus includes: first and second power-supply terminals; an internal circuit connected between the first and second power-supply terminals; and a protection circuit connected in parallel with the internal circuit between the first and second power-supply terminals, the protection circuit including: a series circuit that includes a resistor and a first capacitor, and is connected in parallel with the internal circuit between the first and second power-supply terminals; a first MOS transistor that is connected in parallel with the series circuit, and is controlled according to a voltage at a connection point between the resistor and the first capacitor; and a switch circuit that is connected in parallel with the resistor, is turned on in a delayed manner after a power-supply voltage is applied between the first and second power-supply terminals, and changes the voltage at the connection point so that the first MOS transistor is turned off.

7. 发明申请

US20110128657A1 SEMICONDUCTOR APPARATUS 有权
公开(公告)号：US20110128657A1
公开(公告)日：2011-06-02
申请号：US12958256
申请日：2010-12-01
申请人： Kazumasa Akai , Masahiro Nakahata
发明人： Kazumasa Akai , Masahiro Nakahata
IPC分类号： H02H9/04
CPC分类号： H01L27/0285
摘要： A semiconductor apparatus includes: first and second power-supply terminals; an internal circuit connected between the first and second power-supply terminals; and a protection circuit connected in parallel with the internal circuit between the first and second power-supply terminals, the protection circuit including: a series circuit that includes a resistor and a first capacitor, and is connected in parallel with the internal circuit between the first and second power-supply terminals; a first MOS transistor that is connected in parallel with the series circuit, and is controlled according to a voltage at a connection point between the resistor and the first capacitor; and a switch circuit that is connected in parallel with the resistor, is turned on in a delayed manner after a power-supply voltage is applied between the first and second power-supply terminals, and changes the voltage at the connection point so that the first MOS transistor is turned off.
摘要翻译：半导体装置包括：第一和第二电源端子; 连接在第一和第二电源端子之间的内部电路; 以及与所述第一和第二电源端子之间的内部电路并联连接的保护电路，所述保护电路包括：串联电路，包括电阻器和第一电容器，并且在所述第一和第二电源端子之间并联连接所述内部电路和第二电源端子; 与串联电路并联连接的第一MOS晶体管，并根据电阻器与第一电容器之间的连接点处的电压进行控制; 并且与电阻并联连接的开关电路在第一和第二电源端子之间施加电源电压之后以延迟的方式导通，并且改变连接点处的电压，使得第一 MOS晶体管关闭。

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