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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：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：US07859242B2
公开(公告)日：2010-12-28
申请号：US12327001
申请日：2008-12-03
申请人： Norihiro Kawagishi , Yuichi Okubo
发明人： Norihiro Kawagishi , Yuichi Okubo
CPC分类号： H02M3/156 , H02M2001/0009 , H02M2001/0025
摘要： A DC-DC converter includes a reference voltage generation circuit. The reference voltage generation circuit generates a reference voltage for determination of the pulse width of a drive signal to be supplied to a switching circuit. The reference voltage generation circuit includes a current sensing circuit. The current sensing circuit has a first MOS transistor, a second MOS transistor, a resistive element and an amplifier circuit.
摘要翻译： DC-DC转换器包括参考电压产生电路。 参考电压产生电路产生用于确定要提供给开关电路的驱动信号的脉冲宽度的参考电压。 参考电压产生电路包括电流检测电路。 电流感测电路具有第一MOS晶体管，第二MOS晶体管，电阻元件和放大器电路。
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公开(公告)号：US20100237897A1
公开(公告)日：2010-09-23
申请号：US12724715
申请日：2010-03-16
IPC分类号： G01R31/36
CPC分类号： H02M3/33507 , G01R19/165 , G01R31/40
摘要： An overcurrent detecting circuit includes a comparison transistor, a constant current source circuit, and a comparison circuit. The comparison transistor includes a gate and a drain respectively connected to a gate and a drain of a main transistor provided in a power circuit. The comparison transistor is used for comparison with the main transistor when a voltage higher than a power supply voltage is applied to the gate of the main transistor and the gate of the comparison transistor during the operation of the power circuit. The constant current source circuit generates a constant current and supplies the constant current to the comparison transistor. The comparison circuit compares a source voltage of the comparison transistor with a source voltage of the main transistor and outputs a voltage indicating the comparison result.
摘要翻译： 过电流检测电路包括比较晶体管，恒流源电路和比较电路。 比较晶体管包括分别连接到设置在电源电路中的主晶体管的栅极和漏极的栅极和漏极。 比较晶体管用于在电源电路的操作期间将高于电源电压的电压施加到主晶体管的栅极和比较晶体管的栅极时与主晶体管进行比较。 恒流源电路产生恒定电流并将恒定电流提供给比较晶体管。 比较电路将比较晶体管的源极电压与主晶体管的源极电压进行比较，并输出表示比较结果的电压。
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公开(公告)号：US08653803B2
公开(公告)日：2014-02-18
申请号：US13200214
申请日：2011-09-21
CPC分类号： H02M3/156 , H02M2001/0032 , Y02B70/16
摘要： A voltage generation circuit includes a voltage detection circuit that generates a detection voltage according to an output voltage, a reference voltage generation circuit that generates a reference voltage which changes periodically, a comparison circuit that generates a control signal according to a result of a comparison between the detection voltage and the reference voltage, wherein control pulses each having a pulse width according to the detection voltage are sequentially appeared in the control signal, and a driving pulse generation circuit that generates a driving pulse corresponding to the control pulse and supplies the generated driving pulse to a transistor connected to a DC power source when the pulse width of the control pulse exceeds a predetermined width, and stops generating the driving pulse when the pulse width of the control pulse becomes smaller than the predetermined width.
摘要翻译： 电压产生电路包括产生根据输出电压的检测电压的电压检测电路，产生周期性变化的参考电压的基准电压产生电路，根据比较结果产生控制信号的比较电路 检测电压和参考电压，其中在控制信号中顺序出现各自具有根据检测电压的脉冲宽度的控制脉冲，以及驱动脉冲产生电路，其产生与控制脉冲相对应的驱动脉冲并提供所产生的驱动 当控制脉冲的脉冲宽度超过预定宽度时，连接到直流电源的晶体管脉冲，并且当控制脉冲的脉冲宽度变得小于预定宽度时停止产生驱动脉冲。
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公开(公告)号：US20100237898A1
公开(公告)日：2010-09-23
申请号：US12724782
申请日：2010-03-16
IPC分类号： G01R31/36
CPC分类号： H02M1/32 , G01R19/165 , G01R31/40
摘要： An overcurrent detecting circuit includes a comparison transistor, a constant current source circuit, a subtraction circuit, and a comparison circuit. The comparison transistor is used for comparison with a main transistor provided in the power circuit. The constant current source circuit supplies a constant current to the comparison transistor. The subtraction circuit subtracts a voltage corresponding to a power supply voltage from a voltage between a drain and a source of the comparison transistor and outputs a voltage indicating the subtraction result. The comparison circuit compares the voltage output from the subtraction circuit with a voltage corresponding to a source voltage of the main transistor and outputs a voltage indicating the comparison result.
摘要翻译： 过电流检测电路包括比较晶体管，恒流源电路，减法电路和比较电路。 比较晶体管用于与设置在电源电路中的主晶体管进行比较。 恒流源电路向比较晶体管提供恒定电流。 减法电路从比较晶体管的漏极和源极之间的电压中减去与电源电压相对应的电压，并输出表示减法结果的电压。 比较电路将来自减法电路的电压输出与对应于主晶体管的源极电压的电压进行比较，并输出表示比较结果的电压。
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公开(公告)号：US20090184603A1
公开(公告)日：2009-07-23
申请号：US12343548
申请日：2008-12-24
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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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：US20120068676A1
公开(公告)日：2012-03-22
申请号：US13237006
申请日：2011-09-20
IPC分类号： G05F1/10
CPC分类号： H02M3/156 , H02M2001/0032 , Y02B70/16
摘要： A voltage generation circuit includes a voltage detection circuit that generates a detection voltage according to an output voltage, a reference voltage generation circuit that generates a reference voltage which changes periodically, a comparison circuit that generates a control signal according to a result of a comparison between the detection voltage and the reference voltage, wherein control pulses each having a pulse width according to the detection voltage are sequentially appeared in the control signal, and a driving pulse generation circuit that generates a driving pulse corresponding to the control pulse and supplies the generated driving pulse to a transistor connected to a DC power source when the pulse width of the control pulse exceeds a predetermined width, and stops generating the driving pulse when the pulse width of the control pulse becomes smaller than the predetermined width.
摘要翻译： 电压产生电路包括产生根据输出电压的检测电压的电压检测电路，产生周期性变化的参考电压的基准电压产生电路，根据比较结果产生控制信号的比较电路 检测电压和参考电压，其中在控制信号中顺序出现各自具有根据检测电压的脉冲宽度的控制脉冲，以及驱动脉冲产生电路，其产生与控制脉冲相对应的驱动脉冲并提供所产生的驱动 当控制脉冲的脉冲宽度超过预定宽度时，连接到直流电源的晶体管脉冲，并且当控制脉冲的脉冲宽度变得小于预定宽度时停止产生驱动脉冲。
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