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公开(公告)号：US20240291263A1
公开(公告)日：2024-08-29
申请号：US18231824
申请日：2023-08-09
发明人： Hironori NAGASAWA
CPC分类号： H02H3/20 , H02H1/0007
摘要： According to one embodiment, a semiconductor device includes a first transistor, a first circuit, and a second circuit. A source of the first transistor is coupled to a first terminal. A gate of the first transistor is coupled to a first node. The first circuit includes a first comparator and a current limiting circuit. The second circuit includes a second comparator, a second transistor, a third transistor, and a third circuit. A source of the second transistor is grounded. A drain of the second transistor is coupled to the first node. The third circuit is configured to turn on the second transistor and the third transistor for a first time period based on an output of the second comparator.
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公开(公告)号：US20230238928A1
公开(公告)日：2023-07-27
申请号：US17890856
申请日：2022-08-18
发明人： Atsushi NAMAI , Hironori NAGASAWA
IPC分类号： H03F3/393
CPC分类号： H03F3/393
摘要： According to one embodiment, a chopper stabilized amplifier includes an input unit, a first chopper, a first amplifier, and a switch circuit. The input unit receives a differential input signal at a first input terminal and a second input terminal. The first chopper modulates the differential input signal based on a first control signal and an inverse signal of the first control signal. The first amplifier amplifies the signals with the modulated differential output from the first chopper. The switch circuit is provided between the input unit and the first chopper, and receives a second control signal and reduces input currents which flow in the first chopper when the first chopper performs a modulating operation, by using an operation with the second control signal.
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公开(公告)号：US20160062383A1
公开(公告)日：2016-03-03
申请号：US14634425
申请日：2015-02-27
发明人： Hironori NAGASAWA
IPC分类号： G05F3/24 , G01R19/165
CPC分类号： G05F3/24 , G01R19/0084 , G01R19/16566
摘要： A power supply voltage detector circuit includes a control signal terminal, switch circuit, first voltage detector circuit, and second voltage detector circuit. The first voltage detector circuit has a first input connected to a power supply terminal and a first output connected to the control signal input of the switch circuit. The first voltage detector circuit outputs a first-ON signal to a control signal input of the switch circuit when the power supply voltage is greater than or equal to the first threshold. The second voltage detector circuit has a second input connected to a power supply output of the switch circuit and second output connectable to a load circuit. The second voltage detector circuit outputs a second-ON signal to the control signal terminal to activate the load circuit when the voltage at the second input is greater than or equal to the second threshold.
摘要翻译： 电源电压检测器电路包括控制信号端子，开关电路，第一电压检测器电路和第二电压检测器电路。 第一电压检测器电路具有连接到电源端子的第一输入端和连接到开关电路的控制信号输入端的第一输出端。 当电源电压大于或等于第一阈值时，第一电压检测器电路将第一ON信号输出到开关电路的控制信号输入端。 第二电压检测器电路具有连接到开关电路的电源输出的第二输入和可连接到负载电路的第二输出。 当第二输入端的电压大于或等于第二阈值时，第二电压检测器电路向控制信号端子输出第二ON信号以激活负载电路。
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公开(公告)号：US20140292302A1
公开(公告)日：2014-10-02
申请号：US14194627
申请日：2014-02-28
发明人： Hiroyuki ABE , Hironori NAGASAWA
IPC分类号： H02M3/156
CPC分类号： H02M1/08 , H03K17/063 , H03K2217/0054 , H03K2217/0081
摘要： A semiconductor switch circuit includes a switch between an input node and an output node that connects nodes to each other according to a control signal and a level shifter outputting the control signal at a boosted level that is greater than a power supply voltage level. The semiconductor switch circuit also includes a booster circuit to output a boosted voltage at the boosted level higher than a power supply voltage level. A control circuit is configured to control the level shifter output of the control signal to the switch. A capacitance switching circuit is included to change the capacitance of a connection between the booster circuit and the level shifter. The capacitance switching circuit can vary capacitance according to the voltage level of the booster circuit output.
摘要翻译： 半导体开关电路包括根据控制信号将节点彼此连接的输入节点和输出节点之间的开关，以及以大于电源电压电平的升压电平输出控制信号的电平移位器。 该半导体开关电路还包括一个升压电路，用于输出升压电平高于电源电压电平的升压电压。 控制电路被配置为控制对开关的控制信号的电平移位器输出。 包括电容切换电路以改变升压电路和电平转换器之间的连接的电容。 电容开关电路可以根据升压电路输出的电压电平来改变电容。
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公开(公告)号：US20150380798A1
公开(公告)日：2015-12-31
申请号：US14633871
申请日：2015-02-27
发明人： Hironori NAGASAWA
摘要： A coupler comprises a multi-layer wiring substrate. A signal transmission line of the coupler has a first line portion extending in a first direction within a first wiring layer of the multi-layer wiring substrate. A branch line of the coupler has a parallel portion that extends along the first direction in parallel with the first line portion. The branch line is connected to the signal transmission line through first and second connection portions in a second wiring layer. A coupling line is disposed in a wiring layer of the multi-layer wiring substrate that is not the first wiring layer. The coupling line is vertically adjacent, via an insulating layer of the multi-layer wiring substrate, to the parallel portion of the branch line.
摘要翻译： 耦合器包括多层布线基板。 耦合器的信号传输线具有在多层布线基板的第一布线层内沿第一方向延伸的第一线部分。 耦合器的分支线具有与第一线部分平行地沿第一方向延伸的平行部分。 分支线通过第二布线层中的第一和第二连接部分连接到信号传输线。 耦合线设置在不是第一布线层的多层布线基板的布线层中。 耦合线通过多层布线基板的绝缘层垂直相邻于分支线的平行部分。
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公开(公告)号：US20170108890A1
公开(公告)日：2017-04-20
申请号：US15051304
申请日：2016-02-23
发明人： Hironori NAGASAWA
IPC分类号： G05F5/00
CPC分类号： G05F5/00
摘要： A power-supply voltage sensing circuit includes a switch circuit having an input connected to a power supply and an output connected to a main circuit, a first circuit that outputs a first signal controlling ON/OFF of the switch circuit in accordance with a power-supply voltage supplied by the power supply, a second circuit that delays the first signal and outputs the delayed first signal as a second signal, a first transistor that outputs a first voltage in accordance with the second signal from the second circuit, a third circuit that outputs a reference voltage when supplied with the power-supply voltage, and a comparison circuit that outputs a third signal that controls whether or not the main circuit is operated in accordance with the first voltage and the reference voltage.
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