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公开(公告)号：US10345360B2
公开(公告)日：2019-07-09
申请号：US15162966
申请日：2016-05-24
申请人： FUJITSU LIMITED
摘要： A capacitor life diagnosis device includes: a first fluctuation detecting unit configured to detect a maximum value of fluctuation in output voltage of a first capacitor every fixed time; and an output unit configured to predict a residual life of the first capacitor on the basis of temporal transition of the maximum value of fluctuation in the output voltage detected by the first fluctuation detecting unit, and output a signal indicating the residual life of the first capacitor.
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公开(公告)号：US20170292984A1
公开(公告)日：2017-10-12
申请号：US15455179
申请日：2017-03-10
申请人： FUJITSU LIMITED
摘要： A capacitor life diagnosis apparatus includes ringing detection circuitry that detects ringing of an output voltage of a power source including a capacitor at an output end, and signal generation circuitry that generates a signal indicating a life of the capacitor based on the ringing detected by the ringing detection circuitry.
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公开(公告)号：US20170147017A1
公开(公告)日：2017-05-25
申请号：US15289223
申请日：2016-10-10
申请人： FUJITSU LIMITED
IPC分类号： G05D23/19
CPC分类号： G05D23/1917 , G01K7/22 , G01K7/427 , G05D23/1928 , G06F1/206
摘要： An electronic apparatus includes a housing; a substrate disposed on the inner side of the housing; a plurality of temperature sensors disposed on the substrate; and a processor. The processor performs a procedure including calculating heat source temperatures of a plurality of heat sources disposed on the substrate from temperatures measured by the temperature sensors by using a first heat transfer model not including a first parameter representing a transient response of heat transfer from the heat sources to the temperature sensors; and calculating a surface temperature of a surface of the housing from the heat source temperatures by using a second heat transfer model including the first parameter and a second parameter representing a transient response of heat transfer from the heat sources to the surface.
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公开(公告)号：US08698547B2
公开(公告)日：2014-04-15
申请号：US13624122
申请日：2012-09-21
申请人： Fujitsu Limited
发明人： Hiroshi Nakao
IPC分类号： H03K17/687
CPC分类号： H03K17/06 , H01L29/2003 , H01L29/7787 , H02M1/36 , H03K17/0412 , Y02B70/1483
摘要： A control circuit includes: a first switching element having a source, a gate, and a drain; a battery configured to supply a voltage to the gate through a second switching element; a PWM signal generator circuit configured to supply a PWM signal to the gate through a third switching element; and a gate control circuit configured to, under a power-off condition, turn on the second switching element to supply the voltage of the battery to the gate and turns off the third switching element, and configured to under a power-on condition, turn on the third switching element to supply the PWM signal voltage to the gate and turns off the second switching element.
摘要翻译： 控制电路包括：具有源极，栅极和漏极的第一开关元件; 配置成通过第二开关元件向栅极提供电压的电池; PWM信号发生器电路，被配置为通过第三开关元件向所述栅极提供PWM信号; 以及门控制电路，其被配置为在断电状态下接通所述第二开关元件以将所述电池的电压提供给所述栅极并且关闭所述第三开关元件，并且被配置为在通电状态下转向 在第三开关元件上向PWM提供PWM信号电压并关断第二开关元件。
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公开(公告)号：US20190097525A1
公开(公告)日：2019-03-28
申请号：US16137597
申请日：2018-09-21
申请人： FUJITSU LIMITED
发明人： Hiroshi Nakao , Yu Yonezawa , YOSHIYASU NAKASHIMA
摘要： A power-supply apparatus includes a power-supply circuit to which an input voltage and an input current are input, to include a switching element to be controlled by a control signal so as to generate an output voltage and an output current, a memory, and a processor coupled to the memory and the processor to calculate a first duty ratio of the control signal so that the output voltage approaches a target voltage, calculate a second duty ratio of the control signal for the switching element, based on the input voltage, the input current, the output voltage, and the output current, detect deterioration of the power-supply circuit, based on the first duty ratio and the second duty ratio, generate the control signal of the first duty ratio when the power-supply circuit has not deteriorated, and generate the control signal for stopping the power-supply circuit when the power-supply circuit has deteriorated.
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公开(公告)号：US20170126135A1
公开(公告)日：2017-05-04
申请号：US15295384
申请日：2016-10-17
申请人： FUJITSU LIMITED
CPC分类号： H02M3/33507 , H02M1/08 , H02M1/36 , H02M2001/0009
摘要： A power supply device includes: a memory; and a processor coupled to the memory and the processor configured to: determine a duty ratio of a control signal of a switching element in a power supply circuit so that an output voltage of the power supply circuit approaches a target voltage; compute an acceptable range of a duty ratio based on an output current of the power supply circuit detected by a current detecting circuit; output the duty ratio when the duty ratio is inside the acceptable range; and stop the power supply circuit when the duty ratio is outside the acceptable range.
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公开(公告)号：US09178425B2
公开(公告)日：2015-11-03
申请号：US14574660
申请日：2014-12-18
申请人： FUJITSU LIMITED
发明人： Hiroshi Nakao
CPC分类号： H02M3/158 , H02M1/084 , H02M2003/1586
摘要： A power supply device has a first delay circuit which delays a first clock signal and outputs a second clock signal, a pulse signal generating circuit which generates a first pulse signal, a first transistor which connects an output node to a power supply potential node according to the first pulse signal, a second transistor which connects the output node to a reference potential node according to the first pulse signal, an integration circuit which integrates and outputs a signal of the output node, and a comparator which compares an output signal of the integration circuit and the reference signal, wherein the pulse signal generating circuit generates the first pulse signal in synchronization with the first clock signal, the second clock signal and the output signal of the comparator, and the frequency of the first pulse signal is constant irrespective of voltage of the output node.
摘要翻译： 电源装置具有延迟第一时钟信号并输出第二时钟信号的第一延迟电路，产生第一脉冲信号的脉冲信号产生电路，根据第一延迟电路将输出节点连接到电源电位节点 所述第一脉冲信号，根据所述第一脉冲信号将所述输出节点连接到参考电位节点的第二晶体管，积分并输出所述输出节点的信号的积分电路，以及比较器，其对所述积分的输出信号进行比较 电路和参考信号，其中脉冲信号发生电路与第一时钟信号，第二时钟信号和比较器的输出信号同步地产生第一脉冲信号，并且第一脉冲信号的频率与电压无关 的输出节点。
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公开(公告)号：US11756616B2
公开(公告)日：2023-09-12
申请号：US17522959
申请日：2021-11-10
申请人： FUJITSU LIMITED
CPC分类号： G11C13/0069 , G11C13/004 , G11C13/0026 , G11C13/0028 , G11C13/0038
摘要： A computer includes: a memristor array including memristors arranged at intersections between word lines and a first bit line in the memristor array and at intersections between the word lines and second bit lines in the memristor array; an adder circuit configured to obtain sum voltages for the second bit lines by adding first voltages generated according to currents that flow in the second bit lines when a first pattern is supplied to the word lines to difference voltages between a reference voltage generated according to a current that flows in the first bit line when a second pattern is supplied to the word lines and second voltages generated according to currents that flow in the second bit lines when a second pattern is supplied to the word lines; and a detection circuit that detects a second bit line that corresponds to a maximum value of the sum voltages.
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公开(公告)号：US20230065733A1
公开(公告)日：2023-03-02
申请号：US17751880
申请日：2022-05-24
申请人： FUJITSU LIMITED
发明人： Hiroshi Nakao
摘要： A calculator includes: registers each including sub-registers that hold pieces of data for use in operation; an operator that executes, in parallel, operations of the pieces of data; and a memory configured to hold a first vector and second vectors to be compared with the first vector. Each second vector is divided into sub-vectors and sub-vector groups each including the sub-vectors of the second vectors are arranged in units of sub-vector groups. A first process of transferring one of sub-vectors of the first vector to sub-registers of a first register among the registers, a second process of transferring the sub-vector group of the second vectors corresponding to the transferred sub-vector of the first vector to sub-registers of a second register, the sub-vector group being held in the memory, and a third process of calculating and integrating numbers of mismatches between bit values of the sub-vectors held are repeatedly executed.
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公开(公告)号：US11264892B2
公开(公告)日：2022-03-01
申请号：US16137597
申请日：2018-09-21
申请人： FUJITSU LIMITED
发明人： Hiroshi Nakao , Yu Yonezawa , Yoshiyasu Nakashima
摘要： A power-supply apparatus includes a power-supply circuit to which an input voltage and an input current are input, to include a switching element to be controlled by a control signal so as to generate an output voltage and an output current, a memory, and a processor coupled to the memory and the processor to calculate a first duty ratio of the control signal so that the output voltage approaches a target voltage, calculate a second duty ratio of the control signal for the switching element, based on the input voltage, the input current, the output voltage, and the output current, detect deterioration of the power-supply circuit, based on the first duty ratio and the second duty ratio, generate the control signal of the first duty ratio when the power-supply circuit has not deteriorated, and generate the control signal for stopping the power-supply circuit when the power-supply circuit has deteriorated.
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