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：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：US20150212536A1

公开(公告)日：2015-07-30

申请号：US14596923

申请日：2015-01-14

Applicant: Seiko Instruments Inc.

Inventor： Masakazu SUGIURA ,  Tsutomu TOMIOKA

IPC: G05F3/16

CPC classification number: G05F3/16 ,  G05F3/24 ,  Y10T307/549

Abstract: To provide a reference voltage circuit capable of outputting a reference voltage excellent in temperature characteristic. A reference voltage circuit includes a first constant current circuit, a first transistor of a first conductivity type which has a source connected to the first constant current circuit and is operated as a first stage source follower, a second constant current circuit, and a second transistor of a second conductivity type which has a gate connected to the source of the first transistor and a source connected to the second constant current circuit and is operated as a second stage source follower. The reference voltage circuit is configured to output a reference voltage from the source of the second transistor.

Abstract translation: 提供能够输出温度特性优异的参考电压的参考电压电路。 参考电压电路包括第一恒流电路，第一导电类型的第一晶体管，其具有连接到第一恒流电路的源极，并作为第一级源极跟随器工作，第二恒流电路和第二晶体管 第二导电类型的栅极连接到第一晶体管的源极，源极连接到第二恒流电路并作为第二级源极跟随器工作。 参考电压电路被配置为从第二晶体管的源极输出参考电压。

公开(公告)号：US20140131552A1

公开(公告)日：2014-05-15

申请号：US14076597

申请日：2013-11-11

Applicant: Seiko Instruments Inc.

Inventor： Tsutomu TOMIOKA ,  Daisuke MURAOKA

IPC: G01J1/46

CPC classification number: H04N5/3694 ,  H04N5/3742

Abstract: To provide a small-area photoelectric conversion device without impairing a resolution switching function, signals for controlling output order control switches provided so as to correspond to photoelectric conversion elements are selected by an output order control circuit and a shift register. In this manner, the number of flip-flops forming a shift register is reduced.

Abstract translation: 为了提供小面积光电转换装置而不损害分辨率切换功能，通过输出顺序控制电路和移位寄存器选择用于控制提供以对应于光电转换元件的输出顺序控制开关的信号。 以这种方式，减少了形成移位寄存器的触发器的数目。

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：US20140240041A1

公开(公告)日：2014-08-28

申请号：US14189580

申请日：2014-02-25

Applicant: Seiko Instruments Inc.

Inventor： Tsutomu TOMIOKA

IPC: H03F3/45

CPC classification number: H03F3/387 ,  H03F3/45475 ,  H03F3/45968 ,  H03F2200/261 ,  H03F2203/45138

Abstract: Provided is an operational amplifier circuit capable of operating with lower current consumption. An amplifier stage, a FIR filter, and a sample and hold circuit are connected in series, thus enabling reduction of an input offset voltage and amplification of an input signal voltage without using an integral circuit. Current consumption of the operational amplifier circuit is reduced because the integral circuit is not used.

Abstract translation: 提供了能够以较低的电流消耗操作的运算放大器电路。 放大器级，FIR滤波器和采样保持电路串联连接，从而能够在不使用积分电路的情况下降低输入失调电压和放大输入信号电压。 由于不使用积分电路，运算放大器电路的电流消耗减少。

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：US20150214838A1

公开(公告)日：2015-07-30

申请号：US14596816

申请日：2015-01-14

Applicant: Seiko Instruments Inc.

Inventor： Tsutomu TOMIOKA ,  Masakazu SUGIURA

IPC: H02M3/156

CPC classification number: H02M3/156 ,  G05F1/56 ,  G05F1/571

Abstract: 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.

Abstract translation: 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。