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1. 发明授权

US09983067B2 Overheat detection circuit and semiconductor device 有权
公开(公告)号：US09983067B2
公开(公告)日：2018-05-29
申请号：US14692883
申请日：2015-04-22
申请人： Seiko Instruments Inc.
发明人： Masakazu Sugiura , Tsutomu Tomioka , Hideyuki Sawai , Atsushi Igarashi , Nao Otsuka , Daisuke Okano
IPC分类号： G01K7/01 , G01K3/00 , H01L27/02
CPC分类号： G01K7/01 , G01K3/005 , H01L27/0255
摘要： Provided is an overheat detection circuit configured to accurately detect a temperature of a semiconductor device even at high temperature and thus avoid outputting an erroneous detection result. The overheat detection circuit includes: a PN junction element, being a temperature sensitive element; a constant current circuit configured to supply the PN junction element with a bias current; a comparator configured to compare a voltage generated at the PN junction element and a reference voltage; a second PN junction element configured to cause a leakage current to flow through a reference voltage circuit at high temperature; and a third PN junction element configured to bypass a leakage current of the constant current circuit at the high temperature.

2. 发明授权

US09831757B2 Voltage regulator 有权
公开(公告)号：US09831757B2
公开(公告)日：2017-11-28
申请号：US14568973
申请日：2014-12-12
申请人： Seiko Instruments Inc.
发明人： Tsutomu Tomioka , Masakazu Sugiura
IPC分类号： H02M1/088 , H02M3/335 , G05F1/56
CPC分类号： H02M1/088 , G05F1/56 , Y10T307/549
摘要： Provided is a voltage regulator configured to suppress a variation of an output voltage so as to stably operate even when a power supply voltage varies. The voltage regulator includes a control circuit having an input terminal connected to a drain of an output transistor, and an output terminal connected to an error amplifier circuit. The control circuit is configured to cause a boost current to flow through an error amplifier circuit when the output voltage varies beyond a predetermined value.

3. 发明授权

US09983068B2 Overheat detection circuit and semiconductor device 有权
公开(公告)号：US09983068B2
公开(公告)日：2018-05-29
申请号：US14969653
申请日：2015-12-15
申请人： Seiko Instruments Inc.
发明人： Masakazu Sugiura , Hideyuki Sawai
IPC分类号： G01K7/00 , G01K15/00 , G01K7/01 , G01K3/00
CPC分类号： G01K7/01 , G01K3/005
摘要： Provided is an overheat detection circuit that is capable of quickly outputting an overheated state detection signal in an overheated state without outputting an unintended erroneous output caused by disturbance noise, such as momentary voltage fluctuations in the power supply. The overheat detection circuit includes: a temperature sensor; a comparison section; and a disturbance noise removal section configured to output an overheated state detection signal to an output section after a predetermined delay time has elapsed. The delay time is reduced in proportion to temperature.

4. 发明授权

US09367074B2 Voltage regulator capable of stabilizing an output voltage even when a power supply fluctuates 有权
标题翻译：即使电源波动，也能够稳定输出电压的电压调节器
公开(公告)号：US09367074B2
公开(公告)日：2016-06-14
申请号：US14551813
申请日：2014-11-24
申请人： Seiko Instruments Inc.
发明人： Tsutomu Tomioka , Masakazu Sugiura
IPC分类号： G05F1/00 , H02H7/00 , H02H9/00 , G05F1/565 , G05F1/56
CPC分类号： G05F1/565 , G05F1/562
摘要： Provided is a voltage regulator configured to suppress overshoot and undershoot so as to output a stabilized voltage. The voltage regulator includes: a high pass filter configured to detect a fluctuation in power supply voltage; a high pass filter configured to detect a fluctuation in output voltage; transistors connected in series, which are each configured to cause a current to flow in accordance with an output of corresponding one of the high pass filters; and a clamp circuit configured to clamp a drain voltage of one of the transistors connected in series. The voltage regulator controls a gate voltage of an output transistor based on a drain voltage of a transistor that includes a gate controlled by the drain voltage of the one of the transistors connected in series.
摘要翻译：提供了一种被配置为抑制过冲和下冲以便输出稳定的电压的电压调节器。电压调节器包括：高通滤波器，被配置为检测电源电压的波动; 高通滤波器，被配置为检测输出电压的波动; 串联连接的晶体管，其各自被配置为根据相应的一个高通滤波器的输出使电流流动; 以及钳位电路，被配置为钳位串联连接的晶体管之一的漏极电压。电压调节器基于包括由串联连接的晶体管之一的漏极电压控制的栅极的晶体管的漏极电压来控制输出晶体管的栅极电压。

5. 发明授权

US09455628B2 Voltage regulator with overshoot suppression circuit and capability to stop overshoot suppression 有权
标题翻译：具有过冲抑制电路的电压调节器和停止过冲抑制的能力
公开(公告)号：US09455628B2
公开(公告)日：2016-09-27
申请号：US14596816
申请日：2015-01-14
申请人： Seiko Instruments Inc.
发明人： Tsutomu Tomioka , Masakazu Sugiura
IPC分类号： G05F1/571 , H02M3/156 , G05F1/56
CPC分类号： H02M3/156 , G05F1/56 , G05F1/571
摘要： To provide a voltage regulator capable of preventing a reduction in output voltage and an increase in output noise in a steady state without performing suppression of an overshoot. A voltage regulator is equipped with an overshoot detection circuit which detects an overshoot on the basis of an output voltage, an overshoot suppression circuit which controls an output terminal of an error amplifier circuit, based on the output of the overshoot detection circuit, and a driver state discrimination circuit which discriminates the state of an output transistor, based on an output voltage of the error amplifier circuit. The driver state discrimination circuit is configured to control the operation of the overshoot suppression circuit.
摘要翻译：提供能够防止在稳定状态下输出电压降低和输出噪声增加而不进行过冲抑制的电压调节器。电压调节器配备有基于输出电压检测过冲的过冲检测电路，基于过冲检测电路的输出来控制误差放大器电路的输出端子的过冲抑制电路和驱动器状态判别电路，其基于误差放大器电路的输出电压来辨别输出晶体管的状态。驱动器状态判别电路被配置为控制过冲抑制电路的操作。

6. 发明授权

US09400515B2 Voltage regulator and electronic apparatus 有权
标题翻译：电压调节器和电子设备
公开(公告)号：US09400515B2
公开(公告)日：2016-07-26
申请号：US14575287
申请日：2014-12-18
申请人： Seiko Instruments Inc.
发明人： Tsutomu Tomioka , Masakazu Sugiura
IPC分类号： G05F1/571 , G05F1/575 , G05F1/565 , G05F1/56 , G05F1/46
CPC分类号： G05F1/571 , G05F1/468 , G05F1/562 , G05F1/565 , G05F1/575
摘要： A voltage regulator is provided which can suppress an occurrence of overshooting in an output voltage at the time of starting a power source with a source voltage or the like. The voltage regulator includes an error amplifier circuit, an overshooting control circuit that is connected to the gate of an output transistor, and an ON/OFF circuit that controls ON and OFF states of at least the error amplifier circuit. Here, the ON/OFF circuit controls the overshooting control circuit so as to turn on the output transistor when a predetermined time passes after at least the error amplifier circuit is turned on at the time of starting the voltage regulator.
摘要翻译：提供了一种电压调节器，其可以抑制在用电源电压等启动电源时的输出电压中的过冲的发生。电压调节器包括误差放大器电路，连接到输出晶体管的栅极的过冲控制电路和控制至少误差放大器电路的导通和截止状态的ON / OFF电路。这里，ON / OFF电路控制过冲控制电路，以便在启动电压调节器时至少在误差放大器电路接通之后经过预定时间后接通输出晶体管。

7. 发明授权

US09059699B2 Power supply switching circuit 有权
标题翻译：电源开关电路
公开(公告)号：US09059699B2
公开(公告)日：2015-06-16
申请号：US14029221
申请日：2013-09-17
申请人： Seiko Instruments Inc.
发明人： Tsutomu Tomioka , Atsushi Igarashi , Masakazu Sugiura
IPC分类号： G05F3/26 , G05F1/59 , G05F1/56 , G05F1/46 , H02J3/14 , H02J1/10 , H03K17/00
CPC分类号： H03K17/005 , G05F1/56 , H02J1/10
摘要： Provided is a power supply switching circuit capable of suppressing a load fluctuation such as undershoot that occurs at an output terminal at the time of power supply switching. The power supply switching circuit includes: a battery connected to the output terminal; a replica current generation circuit for generating a replica current that is proportional to a current flowing from the battery to the output terminal; a voltage regulator connected to the output terminal, the voltage regulator including a reference voltage circuit, an error amplifier circuit, an output transistor, and a voltage divider circuit; and a current mirror circuit for causing the replica current to flow through the output transistor of the voltage regulator.
摘要翻译：提供一种电源切换电路，其能够抑制在电源切换时在输出端子处发生的诸如下冲的负载波动。电源开关电路包括：连接到输出端子的电池; 复制电流产生电路，用于产生与从电池流向输出端的电流成比例的复制电流; 连接到输出端子的电压调节器，所述电压调节器包括参考电压电路，误差放大器电路，输出晶体管和分压器电路; 以及用于使复制电流流过电压调节器的输出晶体管的电流镜电路。

8. 发明授权

US09910452B2 Reference-voltage circuit 有权
公开(公告)号：US09910452B2
公开(公告)日：2018-03-06
申请号：US14490399
申请日：2014-09-18
申请人： Seiko Instruments Inc.
发明人： Kosuke Takada , Masakazu Sugiura
IPC分类号： G05F3/24 , G05F3/26 , H03F3/345 , G05F3/30 , H03F1/30
CPC分类号： G05F3/24 , G05F3/262 , G05F3/30 , H03F1/301 , H03F3/345
摘要： Provided is a reference voltage circuit capable of adjusting an arbitrary output voltage to have arbitrary temperature characteristics. The reference voltage circuit includes: a reference current generating circuit configured to convert a difference between forward voltages of a plurality of PN junction elements into current to generate a first current; a current generating circuit configured to use the first current generated by the reference current generating circuit to generate a second current; and a voltage generating circuit including a first resistive element and a second resistive element, the first resistive element being configured to generate a first voltage having positive temperature characteristics when the first current flows through the first resistive element, the second resistive element being configured to generate a second voltage having negative temperature characteristics when the first current and the second current flow through the second resistive element. The reference voltage circuit outputs a reference voltage obtained by adding the first voltage to the second voltage.

9. 发明授权

US09772365B2 Detection circuit 有权
公开(公告)号：US09772365B2
公开(公告)日：2017-09-26
申请号：US15002686
申请日：2016-01-21
申请人： Seiko Instruments Inc.
发明人： Masakazu Sugiura , Atsushi Igarashi
IPC分类号： G01R31/02 , H03K17/18
CPC分类号： G01R31/026 , H03K17/18 , H03K2217/0054
摘要： Provided is a detection circuit configured to avoid erroneous detection that may occur immediately after a detection circuit is powered on. The detection circuit includes: an output transistor connected between a voltage input terminal and a voltage output terminal; and a load open-circuit detection circuit configured to detect an open circuit of a load connected to the voltage output terminal, in which an output circuit of the load open-circuit detection circuit includes a first transistor and a second transistor connected in series, the first transistor having a gate connected to the output transistor in common, the second transistor having a gate to which a signal indicating that the open-circuit of the load is detected, and in which the first transistor is in an off state when the output transistor is in an off state.

10. 发明授权

US09740222B2 Overcurrent protection circuit for controlling a gate of an output transistor based on an output current 有权
公开(公告)号：US09740222B2
公开(公告)日：2017-08-22
申请号：US14693425
申请日：2015-04-22
申请人： Seiko Instruments Inc.
发明人： Masakazu Sugiura
IPC分类号： G05F1/56 , G05F1/573 , H03K17/082
CPC分类号： G05F1/56 , G05F1/573 , H03K17/0822
摘要： To provide an overcurrent protection circuit which prevents an excessive current from flowing to an output terminal for a long time, and a semiconductor device and a voltage regulator each equipped with the overcurrent protection circuit. An overcurrent protection circuit is configured to include a first transistor which allows a current proportional to an output current flowing through an output transistor to flow, a constant current circuit which allows a reference current to flow, a comparison circuit which compares the current flowing through the first transistor and the reference current, and a control circuit which controls a gate of the output transistor by a signal outputted from the comparison circuit.

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