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11. 发明授权

US09083240B2 DC-DC converter and portable device 有权
标题翻译： DC-DC转换器和便携式设备
公开(公告)号：US09083240B2
公开(公告)日：2015-07-14
申请号：US13692823
申请日：2012-12-03
申请人： FUJITSU LIMITED
发明人： Hiroyuki Nakamoto
IPC分类号： H02M3/158
CPC分类号： H02M3/1582
摘要： A DC-DC converter includes: a step-up-or-step-down circuit including a choke coil and step-down and step-up transistor pairs; and a control circuit to control the transistor pairs based on an output voltage, wherein the control circuit includes: a differential triangular wave generation circuit to generate a positive-phase triangular wave signal and a negative-phase triangular wave signal; a switch to select the positive-phase triangular wave signal or the negative-phase triangular wave signal in response to a switching signal; an error detector to output an error signal; a PWM comparator to compare the positive-phase triangular wave signal or the negative-phase triangular wave signal with the error signal to generate a control pulse signal; a switching comparator to compare the error signal with reference potential and generate the switching signal; and a driver control circuit to generate a control signal for the transistor pairs based on the control pulse signal and the switching signal.
摘要翻译： DC-DC转换器包括：包括扼流线圈和降压和升压晶体管对的升压或降压电路; 以及基于输出电压来控制所述晶体管对的控制电路，其中所述控制电路包括：差分三角波产生电路，用于产生正相三角波信号和负相位三角波信号; 响应于切换信号选择正相三角波信号或负相位三角波信号的开关; 误差检测器，用于输出误差信号; PWM比较器将正相三角波信号或负相位三角波信号与误差信号进行比较，产生控制脉冲信号; 开关比较器，用于将误差信号与参考电位进行比较并产生开关信号; 以及驱动器控制电路，用于根据控制脉冲信号和切换信号产生晶体管对的控制信号。

12. 发明授权

US11340674B2 Power supply apparatus and communication apparatus 有权
公开(公告)号：US11340674B2
公开(公告)日：2022-05-24
申请号：US16192118
申请日：2018-11-15
申请人： FUJITSU LIMITED
发明人： Hong Gao , Hiroyuki Nakamoto
IPC分类号： G06F1/26 , H02J7/35 , H01L31/042 , H02J7/00 , H02J7/34
摘要： A power supply apparatus includes, a power generating circuit that converts energy to power and output a voltage of the power, a first switch installed on either or both of a pair of power lines, a first switch control circuit that controls the first switch based on the level of the voltage, a second switch installed on a branched line coupled to the pair of power lines, a second switch control circuit that controls the second switch based on the level of the voltage, and controls the second switch so that the second switch is repeatedly turned on and off when a power storage circuit is charged with power generated by the power generating circuit, and the power storage circuit installed on the branched line and coupled to the power generating circuit when the first switch and the second switch are set to ON states.

13. 发明申请

US20200025827A1 REMAINING BATTERY POWER MEASURING DEVICE, METHOD OF MEASURING REMAINING BATTERY POWER, AND STORAGE MEDIUM 审中-公开
公开(公告)号：US20200025827A1
公开(公告)日：2020-01-23
申请号：US16508982
申请日：2019-07-11
申请人： FUJITSU LIMITED
发明人： Kenichi Kawasaki , Hiroyuki Nakamoto , Toshihiro Yamanaka , Yoshiyuki Jufuku
IPC分类号： G01R31/367 , G01D5/00 , G01R31/3835
摘要： A remaining battery power measuring device includes a memory and a processor coupled to the memory and configured to detect an operation time period of an object that is to be measured and intermittently operates by power supplied from a battery, adjust time when a battery voltage of the battery is measured, based on the operation time period detected by the processor and measure the battery voltage at the time adjusted by the processor.

14. 发明授权

US10340847B2 Power supply control circuit, energy harvesting device, and control method of energy harvesting device 有权
公开(公告)号：US10340847B2
公开(公告)日：2019-07-02
申请号：US15715869
申请日：2017-09-26
申请人： FUJITSU LIMITED
发明人： Hiroyuki Nakamoto
IPC分类号： H02S40/38 , H04B7/00 , H02J7/35 , H02J7/00
摘要： A power supply control circuit includes: a power supply control switch provided between a load and a capacitor which stores power from an energy harvester in which a plurality of power generation cells are coupled in series and supplies stored power to the load and configured to select whether or not to supply the stored power in the capacitor to the load; and a controller configured to control the power supply control switch based on a first potential extracted from a first coupling node of the plurality of power generation cells and a second potential extracted from a second coupling node different from the first coupling node.

15. 发明申请

US20180152137A1 POWER SUPPLY CONTROL CIRCUIT, ENERGY HARVESTING DEVICE, AND CONTROL METHOD OF ENERGY HARVESTING DEVICE 审中-公开
公开(公告)号：US20180152137A1
公开(公告)日：2018-05-31
申请号：US15715869
申请日：2017-09-26
申请人： FUJITSU LIMITED
发明人： Hiroyuki Nakamoto
IPC分类号： H02S40/38 , H02J7/00
CPC分类号： H02S40/38 , H02J7/0024 , H02J7/35 , H02S50/00 , H04B7/00 , Y02P90/50
摘要： A power supply control circuit includes: a power supply control switch provided between a load and a capacitor which stores power from an energy harvester in which a plurality of power generation cells are coupled in series and supplies stored power to the load and configured to select whether or not to supply the stored power in the capacitor to the load; and a controller configured to control the power supply control switch based on a first potential extracted from a first coupling node of the plurality of power generation cells and a second potential extracted from a second coupling node different from the first coupling node.

16. 发明授权

US09577624B2 Signal conversion circuit and power supply apparatus 有权
标题翻译：信号转换电路和电源装置
公开(公告)号：US09577624B2
公开(公告)日：2017-02-21
申请号：US14698303
申请日：2015-04-28
申请人： FUJITSU LIMITED
发明人： Hong Gao , Hiroyuki Nakamoto
IPC分类号： H02M5/458 , H03K5/1536 , H03K5/08 , H02M3/156 , H02M1/00
CPC分类号： H03K5/1536 , H02M3/156 , H02M2001/0006 , H03K5/08
摘要： A power supply apparatus including: a boost converter configured to generate a power supply voltage to drive to a load circuit from a voltage received from a voltage generation unit; an oscillator configured to receive the minute voltage, and to generate an alternating current signal; and a signal conversion circuit which further includes a half-wave generation circuit configured to receive the alternating current signal, and to generate a half-wave signal of a high potential side or a low potential side, and at least one inverter configured to receive the generated half-wave signal, and to generate a pulse signal; wherein the boost converter is driven by the pulse signal output from the signal conversion circuit in order to generate the power supply voltage.
摘要翻译：一种电源装置，包括：升压转换器，被配置为从从电压产生单元接收的电压产生用于驱动负载电路的电源电压; 配置为接收微小电压并产生交流信号的振荡器; 以及信号变换电路，其还包括被配置为接收所述交流信号并产生高电位侧或低电位侧的半波信号的半波发生电路，以及至少一个逆变器，产生半波信号，并产生脉冲信号; 其中升压转换器由从信号转换电路输出的脉冲信号驱动以产生电源电压。

17. 发明授权

US08971077B2 Power supply circuit, mobile terminals using the same, and control method of the same 有权
标题翻译：电源电路，移动终端使用相同，控制方法相同
公开(公告)号：US08971077B2
公开(公告)日：2015-03-03
申请号：US13760732
申请日：2013-02-06
申请人： Fujitsu Limited
发明人： Hiroyuki Nakamoto
IPC分类号： H02M3/156 , G05F1/46
CPC分类号： G05F1/468 , H02M3/158 , H02M2001/0032 , H02M2001/0058 , Y02B70/1491 , Y02B70/16
摘要： A power supply circuit includes: a first switch and a second switch that are connected in series between an input voltage terminal and a reference power supply; a controller that controls the first and second switches to be turned on and off by turns; a comparator that has an inverting input terminal connected to a voltage supply and that has a non-inverting input terminal connected to a first terminal of a capacitor; a third switch that is provided between an output terminal and the non-inverting input terminal of the comparator; a fourth switch that is provided between a connection node of the first and second switches, and a second terminal of the capacitor; and a latch circuit that detects change of output of the output terminal of the comparator and controls the second switch to be turned off.
摘要翻译：电源电路包括：串联连接在输入电压端子和参考电源之间的第一开关和第二开关; 控制器，其轮流控制所述第一和第二开关的接通和断开; 比较器，其具有连接到电压源的反相输入端子，并且具有连接到电容器的第一端子的非反相输入端子; 第三开关，设置在比较器的输出端子和非反相输入端子之间; 第四开关，设置在第一和第二开关的连接节点与电容器的第二端子之间; 以及锁存电路，其检测比较器的输出端子的输出变化并控制第二开关被关断。

18. 发明授权

US11353837B2 Communication device 有权
公开(公告)号：US11353837B2
公开(公告)日：2022-06-07
申请号：US17014719
申请日：2020-09-08
申请人： FUJITSU LIMITED
发明人： Hiroyuki Sato , Hiroyuki Nakamoto
IPC分类号： G05B19/042 , H01H37/00
摘要： A power supply control device includes: a power generator that converts energy into power; an environmental sensor that detects a state of an ambient environment; and a controller that controls an operation timing of a functional circuit that operates upon receipt of power supplied from the power generator based on the state of the ambient environment detected by the environmental sensor.

19. 发明授权

US10838382B2 Power supply control device 有权
公开(公告)号：US10838382B2
公开(公告)日：2020-11-17
申请号：US16270380
申请日：2019-02-07
申请人： FUJITSU LIMITED
发明人： Hiroyuki Sato , Hiroyuki Nakamoto
IPC分类号： G05B19/042 , H01H37/00
CPC分类号： G05B19/042 , G05B2219/2639 , H01H37/00 , Y02E10/50 , Y02E10/56
摘要： A power supply control device includes: a power generator that converts energy into power; an environmental sensor that detects a state of an ambient environment; and a controller that controls an operation timing of a functional circuit that operates upon receipt of power supplied from the power generator based on the state of the ambient environment detected by the environmental sensor.

20. 发明授权

US10587145B2 Charging circuit and electronic device 有权
公开(公告)号：US10587145B2
公开(公告)日：2020-03-10
申请号：US15462302
申请日：2017-03-17
申请人： FUJITSU LIMITED
发明人： Hong Gao , Hiroyuki Nakamoto
IPC分类号： H02J7/00 , H02J7/35
摘要： A charging circuit includes a first energy harvesting element that performs energy harvesting and supplies a current to a power storage element, a second energy harvesting element that performs energy harvesting, the second energy harvesting element is made in materials same as the first energy harvesting element, and a first switch that is disposed in a current path between the first energy harvesting element and the power storage element and that is put into an off-state, in a case where a first output voltage of the second energy harvesting element is smaller than a first value, thereby cutting off the current path.

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