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公开(公告)号：US09728939B2
公开(公告)日：2017-08-08
申请号：US14876054
申请日：2015-10-06
Applicant: ROHM CO., LTD.
Inventor： Katsuya Obe
CPC classification number: H01T15/00 , F02P3/045 , F02P3/055 , F02P5/1506
Abstract: An igniter includes a switch element and a switch control apparatus. An ignition signal IGT is input to an input line of the switch control apparatus. A high-frequency filter removes high-frequency noise from the input line. A voltage comparator compares an output voltage VFIL of the high-frequency filter with a reference voltage VREF, so as to generate a judgment signal SDET. A driving stage controls an on/off switching operation of the switch element according to the judgment signal SDET. An off-state dead-time circuit prohibits the switch element from turning off during a predetermined dead time after the judgment signal SDET transits to a negated level that corresponds to the off state of the switch element.
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公开(公告)号：US20160134085A1
公开(公告)日：2016-05-12
申请号：US14935763
申请日：2015-11-09
Applicant: Rohm Co., Ltd.
Inventor： Katsuya Obe , Hiroyuki Tanigawa
CPC classification number: H01T15/00 , F02P3/0453 , F02P5/1502 , F02P11/00 , F02P17/12 , F02P2017/121
Abstract: An igniter that includes switch element and switch control device for controlling the switch element depending on ignition signal. The switch control device includes a determination stage that compares voltage associated with the ignition signal with a predetermined voltage to generate a determination signal, a driving stage that controls ON/OFF operations of the switch element depending on the determination signal, a timer circuit that asserts a conduction protection signal when state where the determination signal becomes an assert level corresponding to an ON operation of the switch element continues for predetermined time, a time-varying voltage generating circuit that generates time-varying voltage over time in response to the assertion of the conduction protection signal, and an amplifier that changes the voltage of a control terminal of the switch element such that detection voltage associated with coil current flowing in the switch element is close to the time-varying voltage.
Abstract translation: 一种点火器，其包括用于根据点火信号控制开关元件的开关元件和开关控制装置。 开关控制装置包括：判定级，其将与点火信号相关联的电压与预定电压进行比较以产生判定信号;驱动级，其根据判定信号控制开关元件的接通/断开动作;定时器电路，断言 当确定信号变为与开关元件的导通操作相对应的置位电平的状态时，导通保护信号继续预定时间，时变电压产生电路响应于断言而产生时间变化的电压 导通保护信号和放大器，其改变开关元件的控制端子的电压，使得与在开关元件中流动的线圈电流相关联的检测电压接近时变电压。
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公开(公告)号：US09350142B2
公开(公告)日：2016-05-24
申请号：US14018749
申请日：2013-09-05
Applicant: Rohm Co., Ltd.
Inventor： Katsuya Obe
CPC classification number: H01T15/00 , F02P3/0435 , F02P11/00
Abstract: There are provided a signal detection circuit and an igniter capable of enhancing a capability of withstanding breakdown by noise. The signal detection circuit includes an input terminal Sin configured to receive a control signal from an ECU and a bidirectional floating diode provided between the input terminal and a ground. Further, the signal detection circuit includes an attenuation circuit configured to attenuate an output of the bidirectional floating diode, a low-pass filter configured to pass a low-frequency component of the output of the attenuation circuit, and a comparator configured to compare an output of the low-pass filter with a reference voltage.
Abstract translation: 提供了能够增强耐受噪声破坏的能力的信号检测电路和点火器。 信号检测电路包括被配置为从ECU接收控制信号的输入端子Sin和设置在输入端子和地之间的双向浮动二极管。 此外，信号检测电路包括被配置为衰减双向浮动二极管的输出的衰减电路，被配置为通过衰减电路的输出的低频分量的低通滤波器，以及配置成比较输出 具有参考电压的低通滤波器。
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Patent Agency Ranking
公开(公告)号：US20140062324A1
公开(公告)日：2014-03-06
申请号：US14018749
申请日：2013-09-05
Applicant: Rohm Co., Ltd.
Inventor： Katsuya Obe
IPC: H01T15/00
CPC classification number: H01T15/00 , F02P3/0435 , F02P11/00
Abstract: There are provided a signal detection circuit and an igniter capable of enhancing a capability of withstanding breakdown by noise. The signal detection circuit includes an input terminal Sin configured to receive a control signal from an ECU and a bidirectional floating diode provided between the input terminal and a ground. Further, the signal detection circuit includes an attenuation circuit configured to attenuate an output of the bidirectional floating diode, a low-pass filter configured to pass a low-frequency component of the output of the attenuation circuit, and a comparator configured to compare an output of the low-pass filter with a reference voltage.
Abstract translation: 提供了能够增强耐受噪声破坏的能力的信号检测电路和点火器。 信号检测电路包括被配置为从ECU接收控制信号的输入端子Sin和设置在输入端子和地之间的双向浮动二极管。 此外，信号检测电路包括被配置为衰减双向浮动二极管的输出的衰减电路，被配置为通过衰减电路的输出的低频分量的低通滤波器，以及配置成比较输出 具有参考电压的低通滤波器。
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公开(公告)号：US10230218B2
公开(公告)日：2019-03-12
申请号：US15639719
申请日：2017-06-30
Applicant: ROHM CO., LTD.
Inventor： Katsuya Obe
Abstract: An igniter includes a switch element and a switch control apparatus. An ignition signal IGT is input to an input line of the switch control apparatus. A high-frequency filter removes high-frequency noise from the input line. A voltage comparator compares an output voltage VFIL of the high-frequency filter with a reference voltage VREF, so as to generate a judgment signal SDET. A driving stage controls an on/off switching operation of the switch element according to the judgment signal SDET. An off-state dead-time circuit prohibits the switch element from turning off during a predetermined dead time after the judgment signal SDET transits to a negated level that corresponds to the off state of the switch element.
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公开(公告)号：US09800024B2
公开(公告)日：2017-10-24
申请号：US14935763
申请日：2015-11-09
Applicant: Rohm Co., Ltd.
Inventor： Katsuya Obe , Hiroyuki Tanigawa
CPC classification number: H01T15/00 , F02P3/0453 , F02P5/1502 , F02P11/00 , F02P17/12 , F02P2017/121
Abstract: An igniter that includes switch element and switch control device for controlling the switch element depending on ignition signal. The switch control device includes a determination stage that compares voltage associated with the ignition signal with a predetermined voltage to generate a determination signal, a driving stage that controls ON/OFF operations of the switch element depending on the determination signal, a timer circuit that asserts a conduction protection signal when state where the determination signal becomes an assert level corresponding to an ON operation of the switch element continues for predetermined time, a time-varying voltage generating circuit that generates time-varying voltage over time in response to the assertion of the conduction protection signal, and an amplifier that changes the voltage of a control terminal of the switch element such that detection voltage associated with coil current flowing in the switch element is close to the time-varying voltage.
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公开(公告)号：US09784233B2
公开(公告)日：2017-10-10
申请号：US14923512
申请日：2015-10-27
Applicant: Rohm Co., Ltd.
Inventor： Katsuya Obe
CPC classification number: F02P17/12 , F02D35/028 , F02P3/0442 , F02P2017/121
Abstract: An igniter includes: a switch connected to an ignition coil; and a controller to control the switch according to an ignition signal. The controller includes an ignition signal input; a determination stage comparing a voltage of the input with a reference voltage to generate a determination signal; a drive stage controlling the switch's ON/OFF according to the determination signal; a comparison circuit receiving a first supply voltage, comparing a current on the switch with a reference current, and generating a feedback-signal having a level based on the comparison; an output transistor having one end grounded and the other end connected to an output terminal of an ignition check signal and having a threshold voltage higher than the first supply voltage; and a level-shifter receiving a second supply voltage higher than the threshold voltage, level-shifting the feedback-signal, and outputting the level-shifted feedback-signal to a control terminal of the output transistor.
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公开(公告)号：US20160123294A1
公开(公告)日：2016-05-05
申请号：US14923512
申请日：2015-10-27
Applicant: Rohm Co., Ltd.
Inventor： Katsuya Obe
CPC classification number: F02P17/12 , F02D35/028 , F02P3/0442 , F02P2017/121
Abstract: An igniter includes: a switch connected to an ignition coil; and a controller to control the switch according to an ignition signal. The controller includes an ignition signal input; a determination stage comparing a voltage of the input with a reference voltage to generate a determination signal; a drive stage controlling the switch's ON/OFF according to the determination signal; a comparison circuit receiving a first supply voltage, comparing a current on the switch with a reference current, and generating a feedback-signal having a level based on the comparison; an output transistor having one end grounded and the other end connected to an output terminal of an ignition check signal and having a threshold voltage higher than the first supply voltage; and a level-shifter receiving a second supply voltage higher than the threshold voltage, level-shifting the feedback-signal, and outputting the level-shifted feedback-signal to a control terminal of the output transistor.
Abstract translation: 点火器包括：连接到点火线圈的开关; 以及根据点火信号来控制开关的控制器。 控制器包括点火信号输入; 确定阶段将输入的电压与参考电压进行比较以产生确定信号; 驱动级根据判定信号控制开关的ON / OFF; 接收第一电源电压的比较电路，将所述开关上的电流与参考电流进行比较，以及基于所述比较生成具有电平的反馈信号; 输出晶体管，其一端接地，另一端连接到点火检查信号的输出端并具有高于第一电源电压的阈值电压; 以及电平移位器，接收高于阈值电压的第二电源电压，对反馈信号进行电平移位，并将电平移位的反馈信号输出到输出晶体管的控制端。
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