公开(公告)号：US09261569B2

公开(公告)日：2016-02-16

申请号：US14521040

申请日：2014-10-22

Applicant: Seiko Instruments Inc.

Inventor： Minoru Ariyama ,  Daisuke Muraoka ,  Tomoki Hikichi ,  Kentaro Fukai

IPC: G01R17/02 ,  G01R33/00 ,  G01R33/07 ,  G01L1/00 ,  G01R33/02

CPC classification number: G01R33/0023 ,  G01L1/00 ,  G01R33/0029 ,  G01R33/02 ,  G01R33/07

Abstract: Provided is a sensor device capable of removing the influence of each offset voltage of a sensor element, a differential amplifier, and an amplifier of the sensor device, to thereby detect a physical quantity with high precision and respond to high-speed operation. The sensor device includes: a switch circuit connected to a first terminal pair and a second terminal pair of the sensor element, for controlling switching of the terminal pairs and outputting signal voltages; a differential amplifier including a first input terminal and a second input terminal connected to a first output terminal and a second output terminal of the switch circuit, respectively, for outputting a result obtained by amplifying a difference of the signal voltages; an amplifier including at least two differential input pairs, one of which inputs the differential signal output from the differential amplifier, and at least one of which inputs a reference signal corresponding to a physical quantity to be detected; and a detection voltage setting circuit for outputting the reference signal to the amplifier. Switching of the switch circuit provides a first detection state and a second detection state, and detection is performed in one first detection state and one second detection state.

Abstract translation: 提供了能够消除传感器元件，差分放大器和传感器装置的放大器的每个偏移电压的影响的传感器装置，从而以高精度检测物理量并响应于高速操作。 传感器装置包括：连接到第一端子对的开关电路和传感器元件的第二端子对，用于控制端子对的开关并输出信号电压; 差分放大器，分别包括连接到开关电路的第一输出端和第二输出端的第一输入端和第二输入端，用于输出通过放大信号电压差而获得的结果; 放大器，其包括至少两个差分输入对，其中之一输入从差分放大器输出的差分信号，并且其中的至少一个输入与待检测的物理量相对应的参考信号; 以及检测电压设定电路，用于将参考信号输出到放大器。 开关电路的切换提供第一检测状态和第二检测状态，并且在一个第一检测状态和一秒的检测状态下进行检测。

公开(公告)号：US09128127B2

公开(公告)日：2015-09-08

申请号：US14490377

申请日：2014-09-18

Applicant: Seiko Instruments Inc.

Inventor： Minoru Ariyama ,  Daisuke Muraoka ,  Tomoki Hikichi ,  Kentaro Fukai

IPC: G01R17/02 ,  G01R33/07 ,  G01R33/00 ,  H03K17/95 ,  H03K5/24

CPC classification number: G01R17/02 ,  G01R33/0029 ,  G01R33/07 ,  H03K5/24 ,  H03K17/9517

Abstract: Provided is a sensor device capable of removing the influence of each offset voltage of a sensor element, a differential amplifier, and an amplifier of the sensor device, to thereby detect a physical quantity with high precision. The sensor device includes: a switch circuit, which is connected to a first terminal pair and a second terminal pair of the sensor element, for controlling switching of the terminal pairs and outputting detection voltages; a differential amplifier, which includes a first input terminal and a second input terminal connected to a first output terminal and a second output terminal of the switch circuit, respectively, for outputting a result obtained by amplifying a difference of the detection voltages; an amplifier including at least two differential input pairs, one of which inputs the differential signal output from the differential amplifier, and at least one of which inputs a reference signal corresponding to a physical quantity to be detected; and a detection voltage setting circuit for outputting the reference signal to the amplifier.

Abstract translation: 提供一种能够消除传感器元件，差分放大器和传感器装置的放大器的每个偏移电压的影响的传感器装置，从而以高精度检测物理量。 传感器装置包括：开关电路，连接到第一端子对和传感器元件的第二端子对，用于控制端子对的开关并输出检测电压; 差分放大器，分别包括连接到开关电路的第一输出端和第二输出端的第一输入端和第二输入端，用于输出通过放大检测电压的差而得到的结果; 放大器，其包括至少两个差分输入对，其中之一输入从差分放大器输出的差分信号，并且其中的至少一个输入与待检测的物理量相对应的参考信号; 以及检测电压设定电路，用于将参考信号输出到放大器。

公开(公告)号：US09810746B2

公开(公告)日：2017-11-07

申请号：US14742940

申请日：2015-06-18

Applicant: Seiko Instruments Inc.

Inventor： Kentaro Fukai ,  Minoru Ariyama ,  Tomoki Hikichi ,  Takemasa Miura

IPC: G01R33/07 ,  G01R33/00

CPC classification number: G01R33/07 ,  G01R33/0029

Abstract: To provide a magnetic sensor which is reduced in power consumption without reducing magnetism detection sensitivity of a magnetoelectric transducing element. One end of a magnetoelectric transducing element is connected to an output electrode of a constant current circuit, and the other end thereof is connected to a power supply electrode on the positive side of one or plural signal processing circuits, and the like built in a magnetic sensor, whereby a connection relation of the magnetoelectric transducing element and the signal processing circuit is configured such that they are connected in series with a voltage source.

公开(公告)号：US09453889B2

公开(公告)日：2016-09-27

申请号：US14741976

申请日：2015-06-17

Applicant: Seiko Instruments Inc.

Inventor： Takemasa Miura ,  Minoru Ariyama ,  Tomoki Hikichi ,  Kentaro Fukai

IPC: G01R33/00 ,  G01R33/02 ,  G01R33/06 ,  G01R33/07 ,  G01R1/30

CPC classification number: G01R33/0041 ,  G01R33/07

Abstract: To provide a magnetic sensor device which maintains accuracy thereof while reducing current consumption by switching drive power of a Hall element to two drive power. A magnetic sensor device is equipped with a driving circuit which supplies power to a sensor element, a switch changeover circuit which restricts the supply of the power from the driving circuit to the sensor element, a differential amplifier circuit which performs arithmetic processing on an output signal of the sensor element, a threshold voltage generating circuit which generates a threshold voltage used in magnetism determination, a comparison circuit which compares and determines a voltage of the differential amplifier circuit and the threshold voltage, and a logic circuit which according to the output of the comparison circuit, switches the power outputted from the driving circuit, switches the threshold voltage and controls on/off of the switch changeover circuit in a constant cycle.

Abstract translation: 为了提供一种通过将霍尔元件的驱动功率切换到两个驱动电力来降低电流消耗而保持精度的磁传感器装置。 磁传感器装置配备有向传感器元件供电的驱动电路，限制从驱动电路向传感器元件供电的开关切换电路，对输出信号进行运算处理的差分放大电路 传感器元件的阈值电压产生电路，产生用于磁确定的阈值电压的阈值电压产生电路，比较和确定差分放大器电路的电压和阈值电压的比较电路，以及根据 比较电路，切换从驱动电路输出的功率，切换阈值电压，并以恒定周期控制开关切换电路的接通/断开。

公开(公告)号：US09267818B2

公开(公告)日：2016-02-23

申请号：US14184219

申请日：2014-02-19

Applicant: Seiko Instruments Inc.

Inventor： Daisuke Muraoka ,  Minoru Ariyama ,  Tomoki Hikichi ,  Kentaro Fukai

IPC: G01R33/07 ,  G01D5/14 ,  H03K17/95

CPC classification number: G01D5/145 ,  G01R33/07 ,  H03K17/9517

Abstract: Provided is a magnetic sensor device capable of performing signal processing at high speed with high accuracy. The magnetic sensor device includes: a plurality of Hall elements; a plurality of differential amplifiers to which the plurality of Hall elements are connected, respectively; a detection voltage setting circuit for outputting a reference voltage; and a comparator including: a plurality of differential input pairs connected to the plurality of differential amplifiers, respectively; and a differential input pair connected to the detection voltage setting circuit.

公开(公告)号：US10379565B2

公开(公告)日：2019-08-13

申请号：US14521057

申请日：2014-10-22

Applicant: Seiko Instruments Inc.

Inventor： Masahiro Mitani ,  Minoru Ariyama ,  Daisuke Muraoka ,  Tomoki Hikichi

IPC: H03K3/00 ,  G05F3/26 ,  H03K17/687 ,  H03K19/0185 ,  H03K19/173 ,  H02H9/02 ,  H03K17/0812

Abstract: An output driver circuit provides an overcurrent protection function by a simple circuit configuration. The output driver circuit has a constant-current circuit, a constant-current mirror MOS transistor, and a selector circuit. The constant-current mirror MOS transistor and the output MOS transistor constitute a current mirror circuit. The gate of the output MOS transistor is controlled by a voltage based on a constant current generated by the constant-current mirror MOS transistor, thereby limiting the current flowing between the source and the drain of the output MOS transistor.

公开(公告)号：US09638761B2

公开(公告)日：2017-05-02

申请号：US14518427

申请日：2014-10-20

Applicant: Seiko Instruments Inc.

Inventor： Tomoki Hikichi ,  Daisuke Muraoka ,  Minoru Ariyama ,  Kentaro Fukai

IPC: G01R33/02 ,  G01R33/00 ,  G01R31/28 ,  G01R19/165

CPC classification number: G01R33/0017 ,  G01R19/16538 ,  G01R31/2829

Abstract: To provide a magnetic sensor circuit that outputs a desired detection pulse while preventing an erroneous detection/erroneous release pulse output when a fluctuation in a power supply voltage occurs within an operating power supply voltage range. A magnetic sensor circuit is configured to include a detection circuit that detects a fluctuation in a power supply voltage or an internal power supply voltage and so as not to latch a determination output of a comparator by a latch circuit that, on the basis of a power supply fluctuation detection signal output from the detection circuit, holds the logic of a control clock signal output from an oscillation circuit for a prescribed period of time and determines the output logic of an output terminal.

公开(公告)号：US09523743B2

公开(公告)日：2016-12-20

申请号：US14560806

申请日：2014-12-04

Applicant: Seiko Instruments Inc.

Inventor： Tomoki Hikichi ,  Minoru Ariyama

IPC: G01R33/07 ,  G01R33/00

CPC classification number: G01R33/0088 ,  G01R33/0023 ,  G01R33/072

Abstract: Provided is a magnetic sensor capable of identifying an individual having a high offset voltage, which is a cause of an initial defect in magnetic characteristics, and changes over time. A cross-transmission switch is provided in a changeover switch circuit which transmits to an amplifier circuit a differential signal voltage output from a Hall element, and the cross-transmission switch cross-transmits a signal in any one of a first period and a second period during which a current flowing into the Hall element is switched by a control signal from a control circuit, to thereby determine and identify a magnitude of an offset voltage.

Abstract translation: 提供一种磁传感器，其能够识别具有高偏移电压的个体，其是磁特性中的初始缺陷的原因，并随时间变化。 在转换开关电路中设置有交叉传输开关，该转换开关电路将从霍尔元件输出的差分信号电压发送到放大电路，并且交叉发送开关交叉发送第一周期和第二周期 在此期间，通过来自控制电路的控制信号切换流入霍尔元件的电流，从而确定并识别偏移电压的幅度。

公开(公告)号：US09453888B2

公开(公告)日：2016-09-27

申请号：US14664320

申请日：2015-03-20

Applicant: Seiko Instruments Inc.

Inventor： Tomoki Hikichi ,  Minoru Ariyama ,  Kentaro Fukai ,  Takemasa Miura

IPC: G01R33/00 ,  G01R33/02 ,  G01R33/06 ,  G01R33/07 ,  G01R1/30

CPC classification number: G01R33/0023 ,  G01R33/07

Abstract: The sensor device includes: a physical quantity voltage conversion element; a differential amplifier; a first capacitor that includes one terminal connected to a first output terminal of the differential amplifier; a comparator; a low pass filter circuit arranged at the first output terminal of the differential amplifier; a control circuit configured to on/off control the physical quantity voltage conversion element, the differential amplifier, the comparator, and the low pass filter circuit; and a logic circuit configured to output a result of operation processing performed on an output signal of the comparator. The logic circuit is configured to: successively verify, in a case where there is a change between a previous logic output and a first logic output, the logic outputs a plurality of times; and output a control signal to the control circuit so that the low pass filter circuit is turned on in a second signal processing period and thereafter.

Abstract translation: 传感器装置包括：物理量电压转换元件; 差分放大器; 第一电容器，其包括连接到差分放大器的第一输出端子的一个端子; 比较器 布置在差分放大器的第一输出端的低通滤波器电路; 控制电路，被配置为对物理量电压转换元件，差分放大器，比较器和低通滤波器电路进行开/关控制; 以及逻辑电路，被配置为输出对比较器的输出信号执行的操作处理的结果。 逻辑电路被配置为：在先前逻辑输出和第一逻辑输出之间存在变化的情况下，连续验证逻辑输出多次; 并将控制信号输出到控制电路，使得低通滤波器电路在第二信号处理周期内及之后导通。