公开(公告)号：US20160064916A1

公开(公告)日：2016-03-03

申请号：US14837534

申请日：2015-08-27

Applicant: Seiko Instruments Inc.

Inventor： Masakazu SUGIURA ,  Atsushi IGARASHI ,  Nao OTSUKA

IPC: H02H3/08 ,  H02H3/12

CPC classification number: H02H3/08 ,  H02H3/12

Abstract: Provided is a semiconductor device including a detection circuit in which, even when a load short-circuit detection circuit and a load open-circuit detection circuit perform false detection due to a fluctuation in power supply voltage and the like, an output of a false detection result can be prevented. The detection circuit includes the load short-circuit detection circuit configured to detect a short circuit of a load, the load open-circuit detection circuit configured to detect an open circuit of the load, and a logic circuit configured to output output signals of the load short-circuit detection circuit and the load open-circuit detection circuit to an output terminal of the logic circuit, in which the logic circuit outputs a signal of a non-detection logic to the output terminal when the outputs of the load open-circuit detection circuit and the load short-circuit detection circuit are detection logics.

Abstract translation: 提供了一种包括检测电路的半导体器件，其中即使当负载短路检测电路和负载开路检测电路由于电源电压等的波动而进行错误检测时，也可以输出错误检测 结果可以防止。 检测电路包括：负载短路检测电路，被配置为检测负载的短路;负载开路检测电路，被配置为检测负载的开路;以及逻辑电路，被配置为输出负载的输出信号 短路检测电路和负载开路检测电路连接到逻辑电路的输出端，逻辑电路在负载开路检测的输出端向输出端输出非检测逻辑信号 电路和负载短路检测电路都是检测逻辑。

公开(公告)号：US20150308902A1

公开(公告)日：2015-10-29

申请号：US14692883

申请日：2015-04-22

Applicant: Seiko Instruments Inc.

Inventor： Masakazu SUGIURA ,  Tsutomu TOMIOKA ,  Hideyuki SAWAI ,  Atsushi IGARASHI ,  Nao OTSUKA ,  Daisuke OKANO

IPC: G01K7/01 ,  H01L27/02 ,  G01K13/00

CPC classification number: G01K7/01 ,  G01K3/005 ,  H01L27/0255

Abstract: 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.

Abstract translation: 提供了一种过热检测电路，其被配置为即使在高温也能够精确地检测半导体器件的温度，从而避免输出错误的检测结果。 过热检测电路包括：作为温度敏感元件的PN结元件; 配置为向PN结元件提供偏置电流的恒流电路; 比较器，被配置为比较在PN结元件处产生的电压和参考电压; 第二PN结元件，其构造成使得漏电流在高温下流过参考电压电路; 以及第三PN结元件，其构造成在高温下绕过恒流电路的漏电流。

公开(公告)号：US20130154604A1

公开(公告)日：2013-06-20

申请号：US13672213

申请日：2012-11-08

Applicant: Seiko Instruments Inc.

Inventor： Masakazu SUGIURA

IPC: G05F3/24

CPC classification number: G05F3/30

Abstract: Provided are a reference current generation circuit and a reference voltage generation circuit, which have improved response speed when power supply is activated or fluctuates. In order to reduce a load capacitance of an operational amplifier, a transistor for providing a current to a transistor pair having a common gate-source voltage is provided, and the operational amplifier controls an ON-state resistance of the transistor.

Abstract translation: 提供了当电源被激活或波动时具有改进的响应速度的参考电流产生电路和参考电压产生电路。 为了降低运算放大器的负载电容，提供了用于向具有公共栅极 - 源极电压的晶体管对提供电流的晶体管，并且运算放大器控制晶体管的导通电阻。

公开(公告)号：US20160181924A1

公开(公告)日：2016-06-23

申请号：US14968129

申请日：2015-12-14

Applicant: Seiko Instruments Inc.

Inventor： Masakazu SUGIURA ,  Tsutomu TOMIOKA

IPC: H02M3/158

CPC classification number: G05F1/565

Abstract: Provided is a voltage regulator capable of applying an optimal overshoot suppression unit depending on states. The voltage regulator includes: an amplifier for controlling an output transistor based on a voltage obtained by amplifying a difference between a divided voltage and a reference voltage; a first overshoot suppression unit for controlling a gate voltage of the output transistor, to thereby suppress overshoot of the output voltage; a second overshoot suppression unit for controlling an operating current of the amplifier, to thereby suppress the overshoot of the output voltage; and a control circuit. The control circuit is configured to turn on the first overshoot suppression unit immediately after the voltage regulator is powered on, and turn off the first overshoot suppression unit under a state in which the output voltage is stable.

Abstract translation: 提供了能够根据状态施加最佳过冲抑制单元的电压调节器。 电压调节器包括：放大器，用于基于通过放大分压和参考电压之间的差获得的电压来控制输出晶体管; 第一过冲抑制单元，用于控制输出晶体管的栅极电压，从而抑制输出电压的过冲; 第二过冲抑制单元，用于控制放大器的工作电流，从而抑制输出电压的过冲; 和控制电路。 控制电路被配置为在电压调节器通电之后立即接通第一过冲抑制单元，并且在输出电压稳定的状态下关闭第一过冲抑制单元。

公开(公告)号：US20150188423A1

公开(公告)日：2015-07-02

申请号：US14575287

申请日：2014-12-18

Applicant: Seiko Instruments Inc.

Inventor： Tsutomu TOMIOKA ,  Masakazu SUGIURA

IPC: H02M3/156

CPC classification number: G05F1/571 ,  G05F1/468 ,  G05F1/562 ,  G05F1/565 ,  G05F1/575

Abstract: 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.

Abstract translation: 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之后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。

公开(公告)号：US20150168971A1

公开(公告)日：2015-06-18

申请号：US14551813

申请日：2014-11-24

Applicant: Seiko Instruments Inc.

Inventor： Tsutomu TOMIOKA ,  Masakazu SUGIURA

IPC: G05F1/565

CPC classification number: G05F1/565 ,  G05F1/562

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20140084878A1

公开(公告)日：2014-03-27

申请号：US14029221

申请日：2013-09-17

Applicant: SEIKO INSTRUMENTS INC.

Inventor： Tsutomu TOMIOKA ,  Atsushi IGARASHI ,  Masakazu SUGIURA

IPC: H03K17/00

CPC classification number: H03K17/005 ,  G05F1/56 ,  H02J1/10

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20160216307A1

公开(公告)日：2016-07-28

申请号：US15002686

申请日：2016-01-21

Applicant: Seiko Instruments Inc.

Inventor： Masakazu SUGIURA ,  Atsushi IGARASHI

IPC: G01R31/02

CPC classification number: G01R31/026 ,  H03K17/18 ,  H03K2217/0054

Abstract: 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.

Abstract translation: 提供了一种检测电路，被配置为避免在检测电路通电之后立即发生的错误检测。 检测电路包括：连接在电压输入端子和电压输出端子之间的输出晶体管; 以及负载开路检测电路，被配置为检测连接到所述电压输出端子的负载的开路，其中所述负载开路检测电路的输出电路包括串联连接的第一晶体管和第二晶体管， 所述第一晶体管具有与所述输出晶体管共同连接的栅极，所述第二晶体管具有栅极，在所述栅极上指示所述负载的开路被检测到的信号，并且当所述第一晶体管处于截止状态时， 处于关闭状态。

公开(公告)号：US20150168970A1

公开(公告)日：2015-06-18

申请号：US14569114

申请日：2014-12-12

Applicant: Seiko Instruments Inc.

Inventor： Tsutomu TOMIOKA ,  Masakazu SUGIURA ,  Daisuke YOSHIOKA ,  Hiroki CHUMAN

IPC: G05F1/56

CPC classification number: G05F1/56 ,  G05F1/567

Abstract: Provided is a voltage regulator capable of preventing an output voltage from being increased even when a leakage current flows in an output transistor. The voltage regulator includes a leakage current control circuit. The leakage current control circuit includes an NMOS transistor connected to an output terminal of the voltage regulator. When the output voltage of the voltage regulator increases due to the leakage current of the output transistor, the leakage current control circuit causes the leakage current to flow through the NMOS transistor, to thereby prevent an increase in output voltage.

Abstract translation: 提供了即使当漏电流在输出晶体管中流动时也能够防止输出电压增加的电压调节器。 电压调节器包括漏电流控制电路。 泄漏电流控制电路包括连接到电压调节器的输出端的NMOS晶体管。 当电压调节器的输出电压由于输出晶体管的漏电流而增加时，漏电流控制电路使漏电流流过NMOS晶体管，从而防止输出电压的增加。

公开(公告)号：US20150002131A1

公开(公告)日：2015-01-01

申请号：US14490399

申请日：2014-09-18

Applicant: Seiko Instruments Inc.

Inventor： Kosuke TAKADA ,  Masakazu SUGIURA

IPC: G05F3/24 ,  G05F3/26

CPC classification number: G05F3/24 ,  G05F3/262 ,  G05F3/30 ,  H03F1/301 ,  H03F3/345

Abstract: 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.

Abstract translation: 提供一种能够调节任意输出电压以具有任意温度特性的参考电压电路。 参考电压电路包括：参考电流产生电路，被配置为将多个PN结元件的正向电压之间的差转换为电流以产生第一电流; 电流产生电路，被配置为使用由所述参考电流产生电路产生的所述第一电流产生第二电流; 以及电压产生电路，包括第一电阻元件和第二电阻元件，所述第一电阻元件被配置为当所述第一电流流过所述第一电阻元件时产生具有正温度特性的第一电压，所述第二电阻元件被配置为产生 当第一电流和第二电流流过第二电阻元件时具有负温度特性的第二电压。 参考电压电路输出通过将第一电压加到第二电压而获得的参考电压。