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公开(公告)号：US20100237818A1
公开(公告)日：2010-09-23
申请号：US12722172
申请日：2010-03-11
IPC分类号： H02K29/08
摘要： A driving circuit feeds driving current to a coil in a brushless motor, and feeds bias current to a Hall element that senses the rotational position of the motor. The driving current and bias current are supplied from the same power supply, but the bias current passes through a load element that reduces power dissipation by the Hall bias circuit by causing some of the power to be dissipated by the load element instead. The Hall bias circuit can therefore be combined with the other driving circuitry into a single integrated circuit, even if the brushless motor is driven at a comparatively high voltage.
摘要翻译： 驱动电路将驱动电流馈送到无刷电动机中的线圈，并将偏置电流馈送到感测电动机的旋转位置的霍尔元件。 驱动电流和偏置电流由相同的电源供电，但是偏置电流通过负载元件，通过使负载元件消耗一些功率来降低霍尔偏置电路的功率消耗。 因此，即使在较高电压下驱动无刷电动机，霍尔偏置电路也可以与其他驱动电路组合成单个集成电路。
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公开(公告)号：US20100237926A1
公开(公告)日：2010-09-23
申请号：US12724518
申请日：2010-03-16
IPC分类号： G06G7/14
CPC分类号： G06G7/14
摘要： A voltage generating circuit including first and second voltage sources, and a subtracting circuit. The subtraction circuit is configured as a differential amplifier including an op-amp and four resistors, with an inverting input terminal of the op-amp connected to the second voltage source via a first resistor, a second resistor connected between the inverting input terminal and an output terminal of the op-amp, a non-inverting input terminal of the op-amp connected to the first voltage source via a third resistor of the same size as the second resistor, the non-inverting input terminal of the op-amp connected to a reference potential terminal via a fourth resistor of the same size as the first resistor, the first voltage from the first voltage source and the second voltage from the second voltage source inputted to the subtracting circuit, and the subtracting circuit outputting a third voltage having a positive temperature coefficient.
摘要翻译： 包括第一和第二电压源的电压产生电路和减法电路。 减法电路被配置为包括运算放大器和四个电阻器的差分放大器，其中运算放大器的反相输入端经由第一电阻器连接到第二电压源，第二电阻器连接在反相输入端子和 运算放大器的输出端子，运算放大器的同相输入端子通过与第二电阻器相同尺寸的第三电阻器连接到第一电压源，运算放大器的非反相输入端子连接 经由与第一电阻器相同尺寸的第四电阻器连接到参考电位端子，来自第一电压源的第一电压和来自第二电压源的第二电压输入到减法电路，并且减法电路输出具有 正温度系数。
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公开(公告)号：US07741884B2
公开(公告)日：2010-06-22
申请号：US12327174
申请日：2008-12-03
IPC分类号： H03K3/00
CPC分类号： H03K17/0822
摘要： A load drive circuit which can operate at high speed with low consumption current while performing the gate-to-source over voltage protection for its load driving field-effect transistor. A Zener function device is connected between the gate and the source of the load driving field-effect transistor, and an on/off-switch circuit to supply either on-potential or off-potential to the gate of the field effect transistor is provided. The current flowing through the Zener function device when the load driving field-effect transistor is conductive is limited by the on/off-switch circuit.
摘要翻译： 一种负载驱动电路，能够以低功耗电流高速运行，同时对其负载驱动场效应晶体管进行栅极到源极过电压保护。 齐纳功能器件连接在负载驱动场效应晶体管的栅极和源极之间，并且提供了向场效应晶体管的栅极提供导通或截止电位的导通/截止开关电路。 当负载驱动场效应晶体管导通时，流过齐纳函数器件的电流受到导通/截止开关电路的限制。
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公开(公告)号：US20090153122A1
公开(公告)日：2009-06-18
申请号：US12326947
申请日：2008-12-03
IPC分类号： G05F1/00
CPC分类号： G05F1/56
摘要： A dropper-type regulator capable of providing a soft start function using a simple circuit configuration. An exemplary regulator includes a first FET having a relatively high current driving capability and a second FET having a relatively low current driving capability are provided in parallel between an input terminal and an output terminal. For a predetermined time immediately after power activation, only the second FET is driven, thereby preventing a large rush current. A switch circuit connected to the gate of the first FET is operated after the predetermined period of time, thereby supplying a driving voltage to the gate of the first FET.
摘要翻译： 一种能够使用简单电路配置提供软启动功能的滴管式调节器。 示例性调节器包括具有相对高的电流驱动能力的第一FET和具有相对低的电流驱动能力的第二FET并联设置在输入端子和输出端子之间。 在电源激活之后的预定时间内，仅驱动第二FET，从而防止大的冲击电流。 连接到第一FET的栅极的开关电路在预定时间段之后被操作，从而向第一FET的栅极提供驱动电压。
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公开(公告)号：US08058854B2
公开(公告)日：2011-11-15
申请号：US12343548
申请日：2008-12-24
IPC分类号： G05F1/577
CPC分类号： H03F1/308 , H03F3/3038 , H03F3/68 , H03F2200/297 , H03F2203/30061
摘要： A drive circuit includes a plurality of output drive terminals and a plurality of push-pull circuit stages. Each of the push-pull circuit stages includes a pair of complementary transistors having a common terminal connected to a respective output drive terminal. The drive circuit further includes a plurality of first transistors connected in series with at least one of the pair of complementary transistors of the push-pull circuit stages, respectively, and a common second transistor. The common second transistor is connected with each of the plurality of first transistors to form a current mirror circuit. The drive circuit further includes a mirror current setting circuit for setting a mirror current flowing through the common transistor.
摘要翻译： 驱动电路包括多个输出驱动端子和多个推挽电路级。 每个推挽电路级包括一对互补晶体管，其具有连接到相应的输出驱动端子的公共端子。 驱动电路还包括分别与推挽电路级的一对互补晶体管中的至少一个串联连接的多个第一晶体管和公共第二晶体管。 公共第二晶体管与多个第一晶体管中的每一个连接以形成电流镜电路。 驱动电路还包括用于设置流过公共晶体管的镜电流的反射镜电流设置电路。
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公开(公告)号：US08120338B2
公开(公告)日：2012-02-21
申请号：US12326947
申请日：2008-12-03
IPC分类号： G05F1/618
CPC分类号： G05F1/56
摘要： A dropper-type regulator capable of providing a soft start function using a simple circuit configuration. An exemplary regulator includes a first FET having a relatively high current driving capability and a second FET having a relatively low current driving capability are provided in parallel between an input terminal and an output terminal. For a predetermined time immediately after power activation, only the second FET is driven, thereby preventing a large rush current. A switch circuit connected to the gate of the first FET is operated after the predetermined period of time, thereby supplying a driving voltage to the gate of the first FET.
摘要翻译： 一种能够使用简单电路配置提供软启动功能的滴管式调节器。 示例性调节器包括具有相对高的电流驱动能力的第一FET和具有相对低的电流驱动能力的第二FET并联设置在输入端子和输出端子之间。 在电源激活之后的预定时间内，仅驱动第二FET，从而防止大的冲击电流。 连接到第一FET的栅极的开关电路在预定时间段之后被操作，从而向第一FET的栅极提供驱动电压。
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