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1. 发明授权

US10389109B2 Overvoltage protection circuit and overvoltage protection control method 有权
公开(公告)号：US10389109B2
公开(公告)日：2019-08-20
申请号：US15431256
申请日：2017-02-13
申请人： FUJITSU LIMITED
发明人： Hong Gao , Hiroyuki Nakamoto
IPC分类号： H02H7/20 , H02J7/00 , H02J9/06 , H01L31/02 , H02S50/00 , H02S50/10
摘要： There is provided an overvoltage protection circuit including: a comparator configured to compare a DC voltage supplied to a first load by a power generator with a first value set based on an upper limit of an operating voltage of the first load; a storage element configured to be charged with a portion of a current generated by the power generator; and a switch configured to change a flow of the current so that: when the DC voltage is higher than the first value, the portion of the current is supplied to the storage element and a second load coupled to the storage element in parallel, and when the DC voltage is less than or equal to the first value, the storage element supplies the second load with power.

2. 发明申请

US20150180411A1 OSCILLATOR AND POWER MANAGEMENT APPARATUS 有权
标题翻译：振荡器和电源管理装置
公开(公告)号：US20150180411A1
公开(公告)日：2015-06-25
申请号：US14572504
申请日：2014-12-16
申请人： FUJITSU LIMITED
发明人： Hong GAO , Masafumi Kondou , Hiroyuki Nakamoto
IPC分类号： H03B5/12
CPC分类号： H03B5/1234 , H03B5/1203 , H03B5/1206 , H03B5/1228 , H03B5/1296
摘要： An oscillator includes a transformer, a first capacitor, a first transistor, a depletion or native second transistor, and a current control circuit. The transformer includes a primary winding configured to receive an input voltage and a secondary winding configured to boost the input voltage to generate an output voltage. The first capacitor is configured to form an LC resonant circuit together with the secondary winding to cause oscillation operation, the first transistor is connected in series with the primary winding, and the output voltage is applied to a control terminal of the first transistor. The depletion or native second transistor is connected in series with the primary winding and the first transistor, and the current control circuit is configured to adjust a control voltage applied to a control terminal of the second transistor to control a current flowing through the first winding.
摘要翻译：振荡器包括变压器，第一电容器，第一晶体管，耗尽或本机第二晶体管以及电流控制电路。变压器包括被配置为接收输入电压的初级绕组和被配置为升高输入电压以产生输出电压的次级绕组。第一电容器被配置为与次级绕组一起形成LC谐振电路以引起振荡操作，第一晶体管与初级绕组串联连接，并且将输出电压施加到第一晶体管的控制端子。耗尽或本机第二晶体管与初级绕组和第一晶体管串联连接，并且电流控制电路被配置为调整施加到第二晶体管的控制端子的控制电压，以控制流过第一绕组的电流。

3. 发明授权

US09000810B2 Quantizer, comparator circuit, and semiconductor integrated circuit 有权
标题翻译：量化器，比较器电路和半导体集成电路
公开(公告)号：US09000810B2
公开(公告)日：2015-04-07
申请号：US14075763
申请日：2013-11-08
申请人： Fujitsu Limited , Fujitsu Semiconductor Limited
发明人： Hiroyuki Nakamoto , Hideta Oki
IPC分类号： H03K3/00 , H03M1/12
CPC分类号： H03M1/12 , G01R19/16542 , H03K5/2472
摘要： A quantizer takes an analog signal as input and produces a quantized signal for output. The quantizer includes a shoot-through current detection unit and a feedback unit. The shoot-through current detection unit is configured to detect a shoot-through current flowing through the quantizer. The feedback unit is configured to feed back a signal from the shoot-through current detection unit and control an electric charge stored at an input of the quantizer.
摘要翻译：量化器将模拟信号作为输入，并产生用于输出的量化信号。量化器包括直通电流检测单元和反馈单元。直通电流检测单元被配置为检测流过量化器的直通电流。反馈单元被配置为反馈来自直通电流检测单元的信号并控制存储在量化器的输入端的电荷。

4. 发明授权

US08941437B2 Bias circuit 有权
标题翻译：偏置电路
公开(公告)号：US08941437B2
公开(公告)日：2015-01-27
申请号：US14189780
申请日：2014-02-25
申请人： Fujitsu Limited
发明人： Hiroyuki Nakamoto
IPC分类号： G05F1/10 , G05F3/02
CPC分类号： G05F1/10 , G05F3/205
摘要： A bias circuit includes: a reference current generation circuit that has a first reference-current element disposed in a first current path and has a second reference-current element disposed in a second current path; a first current mirror circuit that has a first transistor connected in series with the first reference-current element and has a second transistor connected in series with the second reference-current element; a third reference-current element disposed in a third current path disposed between the power supply terminal and the reference-current element; a third transistor connected in series with the third reference-current element; a bypass capacitor connected between the power supply terminal and a second node connected to a control terminal of the third transistor; an activation circuit connected to the first node; and a first switch connected between the first node and the second node.
摘要翻译：偏置电路包括：参考电流产生电路，其具有设置在第一电流路径中的第一参考电流元件，并且具有设置在第二电流路径中的第二参考电流元件; 第一电流镜电路，具有与第一参考电流元件串联连接的第一晶体管，并具有与第二参考电流元件串联连接的第二晶体管; 设置在设置在所述电源端子和所述基准电流元件之间的第三电流路径中的第三基准电流元件; 与第三参考电流元件串联连接的第三晶体管; 连接在电源端子和连接到第三晶体管的控制端子的第二节点之间的旁路电容器; 连接到第一节点的激活电路; 以及连接在第一节点和第二节点之间的第一开关。

5. 发明申请

US20180143675A1 POWER SUPPLY CONTROLLER AND ENERGY HARVESTING APPARATUS 审中-公开
公开(公告)号：US20180143675A1
公开(公告)日：2018-05-24
申请号：US15813241
申请日：2017-11-15
申请人： FUJITSU LIMITED
发明人： HIROYUKI SATO , Hiroyuki Nakamoto
IPC分类号： G06F1/26 , H02J50/05 , H01L31/053 , H02N11/00 , H02J7/34
CPC分类号： G06F1/26 , H01L31/053 , H02J7/345 , H02J7/35 , H02J50/05 , H02N11/002
摘要： A power supply controller controlling a connection between a power source and a capacitor coupled between a first node and a second node and a load circuit operating with electric charge of the capacitor, includes a first controller configured to output a first control signal in accordance with an electric potential difference between the first node and the second node, a first switch configured to couple or uncouple the capacitor to or from the load circuit in response to the first control signal, a first resistor coupled between the first node and the first controller, a second resistor coupled between a node being located between the first resistor and the first controller and a third node for outputting the first control signal, and a second switch coupled in parallel to the first resistor and putting into on or off state in response to the first control signal.

6. 发明授权

US09240753B2 Oscillator and power management apparatus 有权
标题翻译：振荡器和电源管理设备
公开(公告)号：US09240753B2
公开(公告)日：2016-01-19
申请号：US14572504
申请日：2014-12-16
申请人： FUJITSU LIMITED
发明人： Hong Gao , Masafumi Kondou , Hiroyuki Nakamoto
IPC分类号： H03B5/12
CPC分类号： H03B5/1234 , H03B5/1203 , H03B5/1206 , H03B5/1228 , H03B5/1296
摘要： An oscillator includes a transformer, a first capacitor, a first transistor, a depletion or native second transistor, and a current control circuit. The transformer includes a primary winding configured to receive an input voltage and a secondary winding configured to boost the input voltage to generate an output voltage. The first capacitor is configured to form an LC resonant circuit together with the secondary winding to cause oscillation operation, the first transistor is connected in series with the primary winding, and the output voltage is applied to a control terminal of the first transistor. The depletion or native second transistor is connected in series with the primary winding and the first transistor, and the current control circuit is configured to adjust a control voltage applied to a control terminal of the second transistor to control a current flowing through the first winding.
摘要翻译：振荡器包括变压器，第一电容器，第一晶体管，耗尽或本机第二晶体管以及电流控制电路。变压器包括被配置为接收输入电压的初级绕组和被配置为升高输入电压以产生输出电压的次级绕组。第一电容器被配置为与次级绕组一起形成LC谐振电路以引起振荡操作，第一晶体管与初级绕组串联连接，并且将输出电压施加到第一晶体管的控制端子。耗尽或本机第二晶体管与初级绕组和第一晶体管串联连接，并且电流控制电路被配置为调整施加到第二晶体管的控制端子的控制电压，以控制流过第一绕组的电流。

7. 发明授权

US09921595B2 Circuit for generating stepped-down voltage 有权
公开(公告)号：US09921595B2
公开(公告)日：2018-03-20
申请号：US15062466
申请日：2016-03-07
申请人： FUJITSU LIMITED
发明人： Hiroyuki Nakamoto
IPC分类号： G05F1/575 , G05F1/56 , H02J7/00 , H02M3/158
CPC分类号： G05F1/575 , G05F1/56 , H02J7/0065 , H02M3/158
摘要： A circuit includes a PMOS transistor having a source coupled to an input node and a drain coupled to an output node, a control circuit operating with a voltage of an internal line to control a gate voltage of the PMOS transistor, a comparator operating with the voltage of the internal line to cause a comparator output to change from a first state to a second state in response to a drop of voltage of the input node, a switch circuit configured to connect the input node to the internal line when the comparator output is in the first state, and to connect the output node to the internal line when the comparator output is in the second state, and a block circuit configured to block a path from the output node to the input node through the PMOS transistor when the comparator output is in the second state.

8. 发明申请

US20160226381A1 POWER CONTROL CIRCUIT, ENVIRONMENTAL POWER GENERATION DEVICE, AND CONTROL METHOD OF ENVIRONMENTAL POWER GENERATION DEVICE 有权
标题翻译：电力控制电路，环境发电装置及环境发电装置的控制方法
公开(公告)号：US20160226381A1
公开(公告)日：2016-08-04
申请号：US14976959
申请日：2015-12-21
申请人： FUJITSU LIMITED
发明人： Hong Gao , Hiroyuki Nakamoto
IPC分类号： H02M3/158
CPC分类号： H02M3/1563 , G05F1/562 , H02M2001/0025
摘要： A power control circuit includes: a differential voltage monitor configured to monitor a differential voltage between a first voltage and a second voltage, and control a switching element to be turned on and off, wherein the differential voltage monitor controls the switching element in such a manner that in a case where the differential voltage is increased, when the differential voltage is lower than a first reference voltage, the switching element is turned off, and when the differential voltage is equal to or higher than the first reference voltage, the switching element is turned on, and in a case where the differential voltage is decreased, when the differential voltage is higher than a second reference voltage, the switching element is turned on, and when the differential voltage is equal to or lower than the second reference voltage, the switching element is turned off.
摘要翻译：电力控制电路包括：差分电压监视器，被配置为监视第一电压和第二电压之间的差分电压，并控制开关元件导通和截止，其中差分电压监视器以这种方式控制开关元件在差分电压增加的情况下，当差分电压低于第一参考电压时，开关元件截止，当差分电压等于或高于第一参考电压时，开关元件为导通，在差分电压降低的情况下，当差分电压高于第二参考电压时，开关元件导通，当差分电压等于或低于第二基准电压时，开关元件关闭。

9. 发明申请

US20160187905A1 CIRCUIT FOR GENERATING STEPPED-DOWN VOLTAGE 有权
标题翻译：用于产生降压的电路
公开(公告)号：US20160187905A1
公开(公告)日：2016-06-30
申请号：US15062466
申请日：2016-03-07
申请人： FUJITSU LIMITED
发明人： Hiroyuki Nakamoto
IPC分类号： G05F1/575
CPC分类号： G05F1/575 , G05F1/56 , H02J7/0065 , H02M3/158
摘要： A circuit includes a PMOS transistor having a source coupled to an input node and a drain coupled to an output node, a control circuit operating with a voltage of an internal line to control a gate voltage of the PMOS transistor, a comparator operating with the voltage of the internal line to cause a comparator output to change from a first state to a second state in response to a drop of voltage of the input node, a switch circuit configured to connect the input node to the internal line when the comparator output is in the first state, and to connect the output node to the internal line when the comparator output is in the second state, and a block circuit configured to block a path from the output node to the input node through the PMOS transistor when the comparator output is in the second state.
摘要翻译：电路包括具有耦合到输入节点的源极和耦合到输出节点的漏极的PMOS晶体管，用内部线路的电压操作以控制PMOS晶体管的栅极电压的控制电路，具有电压的比较器的内部线路，以使得比较器输出响应于输入节点的电压的下降而从第一状态改变到第二状态;开关电路，被配置为当比较器输出处于输入节点时将输入节点连接到内部线路第一状态，并且当比较器输出处于第二状态时，将输出节点连接到内部线路;以及块电路，其被配置为当比较器输出为比较器输出时通过PMOS晶体管阻塞从输出节点到输入节点的路径在第二个状态。

10. 发明授权

US09270265B2 Power on reset circuit, power supply circuit, and power supply system 有权
标题翻译：上电复位电路，电源电路和电源系统
公开(公告)号：US09270265B2
公开(公告)日：2016-02-23
申请号：US14179199
申请日：2014-02-12
申请人： FUJITSU LIMITED , FUJITSU SEMICONDUCTOR LIMITED
发明人： Hiroyuki Nakamoto , Kazuaki Oishi , Tomokazu Kojima
IPC分类号： H03L7/00 , H03K17/22 , H03K3/037
CPC分类号： H03K17/223 , H03K3/0375 , H03K17/22
摘要： A power on reset circuit including: a startup circuit keeping an operation signal in an operating state during a power supply rises; a bias circuit keeping the operation signal in the operating state; a BGR circuit being activated during the operating state, and outputting a fixed voltage after a predetermined time elapses; a power supply divided voltage generation circuit outputting a reference voltage; an activation detection circuit generating a control signal which becomes inactive when a power supply rises and becomes active when the fixed voltage reaches a predetermined level; a comparator circuit outputting a power on signal and detecting as the power on signal when the reference voltage is greater than the fixed voltage; and a switch turning on and fixing an output of the comparator circuit to an inactive logical value while the control signal is inactive, and turning off while the control signal is active.
摘要翻译：一种上电复位电路，包括：在电源上升期间保持操作信号处于工作状态的启动电路; 偏置电路，保持操作信号处于工作状态; BGR电路在工作状态下被激活，并经过预定时间后输出固定电压; 输出参考电压的电源分压电压产生电路; 激活检测电路，产生当电源上升时变得无效的控制信号，并且当固定电压达到预定电平时变为有效; 输出上电信号的比较器电路，当所述基准电压大于所述固定电压时，检测为所述上电信号; 并且当控制信号不活动时，开关导通并将比较器电路的输出固定为无效逻辑值，并且在控制信号有效时关闭。

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