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    Physical quantity detection circuit, physical quantity sensor, electronic device, vehicle, and failure diagnosis method of physical quantity sensor
    1.
    发明授权
    Physical quantity detection circuit, physical quantity sensor, electronic device, vehicle, and failure diagnosis method of physical quantity sensor 有权

    公开(公告)号：US11333526B2

    公开(公告)日：2022-05-17

    申请号：US16820840

    申请日：2020-03-17

    Applicant: Seiko Epson Corporation ,  DENSO CORPORATION

    Inventor： Kiminori Nakajima ,  Naoki Yoshida

    IPC: G01C25/00 ,  G01C23/00

    Abstract: A physical quantity detection circuit includes a detection signal generation circuit that generates a detection signal based on an output signal of a physical quantity detection element, an analog/digital conversion circuit that converts the detection signal into a first digital signal during a first period and converts the first test signal into a second digital signal during a second period, a digital signal processing circuit that processes the first digital signal to generate a third digital signal during the first period and processes a second test signal to generate a fourth digital signal during the second period, and a failure diagnosis circuit that performs a failure diagnosis of the analog/digital conversion circuit based on the second digital signal and a failure diagnosis of the digital signal processing circuit based on the fourth digital signal during the second period.

    Diagnostic circuit, electronic circuit, electronic device, and mobile body
    2.
    发明授权
    Diagnostic circuit, electronic circuit, electronic device, and mobile body 有权

    公开(公告)号：US11262416B2

    公开(公告)日：2022-03-01

    申请号：US15776147

    申请日：2016-11-09

    Applicant: Seiko Epson Corporation ,  DENSO CORPORATION

    Inventor： Akio Tsutsumi ,  Naoki Yoshida

    IPC: G01R31/64

    Abstract: A diagnostic circuit is provided that diagnoses a connection state of a capacitor connected to an output terminal of a regulator that outputs a first voltage, the diagnostic circuit including: a switching circuit that performs, during a first period, a switching control process of switching an output voltage of the regulator to a second voltage that is higher than the first voltage; a detecting circuit that detects a variation in an output current of the regulator caused by the switching control process; and a determining circuit that determines the connection state of the capacitor, based on a detection result of the detecting circuit.

    Physical quantity sensor and manufacturing method therefor
    3.
    发明授权
    Physical quantity sensor and manufacturing method therefor 有权

    公开(公告)号：US10509051B2

    公开(公告)日：2019-12-17

    申请号：US15537665

    申请日：2016-01-07

    Applicant: DENSO CORPORATION

    Inventor： Kiyomasa Sugimoto ,  Naoki Yoshida

    IPC: G01P15/125 ,  H01L23/48 ,  B81B7/00 ,  H01L29/84 ,  B81B3/00 ,  B81C3/00

    Abstract: A physical quantity sensor includes: a detection element that outputs a sensor signal in accordance with a physical quantity; and a mount member. The detection element includes a sensor portion that has a first surface, includes a movable electrode, and a fixed electrode, and outputs the sensor signal, and a cap portion that has a first surface and is bonded with the sensor portion. Each of the first surface of the sensor portion and the first surface of the cap portion is mounted on the mount member, and the detection element detects the physical quantity. An electrode, which is connected with the movable electrode and connected with a circuit portion, and an electrode, which is connected with the fixed electrode and connected with the circuit portion, are provided on a side surface continued to the first surface of the cap portion.

    Memory device system
    4.
    发明授权
    Memory device system 有权

    公开(公告)号：US10289498B2

    公开(公告)日：2019-05-14

    申请号：US15540415

    申请日：2015-12-24

    Applicant: DENSO CORPORATION ,  SEIKO EPSON CORPORATION

    Inventor： Naoki Yoshida ,  Kiminori Nakajima

    IPC: G06F11/00 ,  G06F11/14 ,  G06F11/10 ,  G06F11/16

    Abstract: A memory device system is provided. The memory device includes a first memory, a second memory, a first register, a second register, a comparator, a transfer register, an error data register, an error address register, a parity calculation portion, and a controller. The first memory has m lines of addresses in which pieces of data are stored, and a parity bit. The second memory has m lines of addresses in which same pieces of data as the data stored in the first memory are stored. The first register is connected with the first memory. The second register is connected with the second memory. The transfer register stores a piece of data of the first memory. The error data register stores a piece of data of the second register. The error address register stores an address of the second memory. The parity calculation portion calculates parity of all pieces of data.

    Angular velocity sensor
    5.
    发明授权
    Angular velocity sensor 有权

    公开(公告)号：US10132631B2

    公开(公告)日：2018-11-20

    申请号：US15123756

    申请日：2015-04-17

    Applicant: DENSO CORPORATION

    Inventor： Minekazu Sakai ,  Naoki Yoshida ,  Kiyomasa Sugimoto

    IPC: G01C19/5607 ,  G01C19/5614 ,  G01C19/5621 ,  G01C19/5628 ,  G01C19/5642 ,  H01L41/047 ,  H03H9/21 ,  H01L41/04 ,  H01L41/113

    Abstract: An angular velocity sensor includes a first substrate having first and second surfaces, a vibrating member disposed on the first substrate and including a drive piece capable of vibrating along the first substrate, a second substrate disposed on the first surface side, a first drive piece control electrode, a first drive piece auxiliary electrode, and a first drive piece control circuit applying a voltage to the first drive piece auxiliary electrode. The first drive piece control circuit adjusts, based on the capacitance generated between the first drive piece control electrode and the first drive piece auxiliary electrode, the voltage to be applied to the first drive piece auxiliary electrode to maintain a constant distance between the first drive piece control electrode and the first drive piece auxiliary electrode.

    Composite sensor
    6.
    发明授权
    Composite sensor 有权

    公开(公告)号：US10508919B2

    公开(公告)日：2019-12-17

    申请号：US15752915

    申请日：2016-08-08

    Applicant: DENSO CORPORATION ,  SEIKO EPSON CORPORATION

    Inventor： Naoki Yoshida ,  Tsugio Ide

    IPC: G01C19/5628 ,  G01P15/125 ,  G01C19/5621 ,  B81B3/00 ,  H01L29/84 ,  H01L41/113

    Abstract: A composite sensor includes a first shield pattern that functions as a noise shield of a circuit board, a second shield pattern that functions as a noise shield of a first sensor, and a third shield pattern that functions as a noise shield of a second sensor. The first shield pattern has an impedance lower than the second shield pattern and the third shield pattern. The second shield pattern and the third shield pattern are electrically connected to each other through the first shield pattern. Accordingly, deterioration of detection accuracy caused by electrical noise is restricted.

    Composite sensor
    7.
    发明授权
    Composite sensor 有权

    公开(公告)号：US10408619B2

    公开(公告)日：2019-09-10

    申请号：US15541773

    申请日：2015-12-25

    Applicant: DENSO CORPORATION ,  SEIKO EPSON CORPORATION

    Inventor： Naoki Yoshida ,  Takashi Aoyama ,  Jun Uehara

    IPC: G01C19/5705 ,  G01P1/02 ,  G01C19/5621 ,  G01C19/5628 ,  G01P15/125 ,  H01L41/047 ,  H01L41/053 ,  H01L41/09 ,  H01L41/113 ,  G01P15/08

    Abstract: A composite sensor includes a first sensor outputting a first sensor signal, a second sensor outputting a second sensor signal, a circuit board electrically connected to the first and second sensors, and a mount member having one surface on which the first and second sensors and the circuit board are disposed. The first and second sensors have respective input terminals to which respective input signals are inputted, and have respective output terminals from which the first and second sensor signals are outputted. When a virtual straight line passing respective centers of the first and second sensors parallel to an arrangement direction of the sensors is defined, the respective input terminals of the first and second sensors are disposed in one of two regions divided by the virtual line, and the respective output terminals of the first and second sensors are disposed in a remaining one of the two regions.

    Physical quantity detection circuit, electronic device, and moving object
    9.
    发明授权
    Physical quantity detection circuit, electronic device, and moving object 有权

    公开(公告)号：US10302431B2

    公开(公告)日：2019-05-28

    申请号：US15343656

    申请日：2016-11-04

    Applicant: Seiko Epson Corporation ,  DENSO CORPORATION

    Inventor： Takashi Aoyama ,  Naoki Yoshida

    IPC: G01C19/5642 ,  G01C19/5614

    Abstract: A physical quantity detection circuit includes: a synchronous detection circuit that performs a synchronous detection process on a detection target signal based on a detection signal, the detection target signal including a physical quantity detection signal and a leakage signal from a physical quantity detection element, the physical quantity detection element vibrating based on a drive signal to generate the physical quantity detection signal corresponding to a magnitude of a physical quantity, and the leakage signal of vibrations based on the drive signal; and a phase shift circuit that switches a phase difference between the detection signal and the detection target signal, between a first phase difference and a second phase difference that differs from the first phase difference, so that at least part of the leakage signal is output through the synchronous detection process.

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