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公开(公告)号：US20180266821A1
公开(公告)日：2018-09-20
申请号：US15756826
申请日：2016-01-27
Applicant: Hitachi, Ltd.
Inventor： Yuhua ZHANG , Joan GINER , Shinya KAJIYAMA
IPC: G01C19/5684
Abstract: Provided is a gyroscope including: a first inertial body that is displaceable in a first direction and a second direction perpendicular to the first direction; a second inertial body that is displaceable in the first direction and the second direction; a third inertial body that is displaceable in the first direction and the second direction; a fourth inertial body that is displaceable in the first direction and the second direction; a first connection unit that supports the first inertial body; a second connection unit that supports the second inertial body; a third connection unit that supports the third inertial body; a fourth connection unit that supports the fourth inertial body; and a connection body that is provided among the first inertial body, the second inertial body, the third inertial body, and the fourth inertial body and connects the first inertial body, the second inertial body, the third inertial body, and the fourth inertial body.
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公开(公告)号：US20200382085A1
公开(公告)日：2020-12-03
申请号：US16828550
申请日：2020-03-24
Applicant: Hitachi, Ltd.
Inventor： Shinya KAJIYAMA , Tadahiro NABETA
Abstract: An amplifier circuit includes a potential relation between a common emitter amplifier circuit (amplifier circuit body) including an NPN transistor (bipolar transistor) and a clamp circuit which maintains a potential relation between a base-collector of the NPN transistor of the common emitter amplifier circuit. The clamp circuit includes a level shift circuit and a clamp diode for suppressing a decrease in the collector potential of the NPN transistor of the common emitter amplifier circuit.
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3.发明申请公开(公告)号：US20200163652A1
公开(公告)日：2020-05-28
申请号：US16596917
申请日：2019-10-09
Applicant: Hitachi, Ltd.
Inventor： Shinya KAJIYAMA , Kengo IMAGAWA , Yoshihiro HAYASHI
Abstract: A switch circuit connected to a transducer, a reception circuit connected to the switch circuit, a first switch element connected to a reception terminal provided between the switch circuit and the reception circuit, a first resistance element connected to a control terminal of the switch circuit, a second resistance element provided inside the reception circuit, and a second switch element provided inside the reception circuit are provided.
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公开(公告)号：US20200077979A1
公开(公告)日：2020-03-12
申请号：US16361406
申请日：2019-03-22
Applicant: Hitachi, Ltd.
Inventor： Yutaka IGARASHI , Shinya KAJIYAMA , Yohei NAKAMURA , Kengo IMAGAWA , Kazuhiro AMINO , Takayuki IWASHITA
Abstract: Provided is a probe which transmits an ultrasonic wave to a diagnostic site and receives a reception signal which is a reflected wave. The probe includes: a plurality of transducers; a plurality of low-noise amplifying circuits respectively corresponding to the plurality of transducers; and a single differential converter which converts a control signal rising with the elapse of time to a first bias signal rising with the elapse of time and a second bias signal falling with the elapse of time to control the plurality of low-noise amplifying circuits, and the low-noise amplifying circuit includes: an attenuator which attenuates an electric signal from the transducer; a first amplifying circuit which sets the first bias signal as a bias and amplifies an output signal of the attenuator to be gradually increased with the elapse of time; a second amplifying circuit which sets the second bias signal as a bias and amplifies the output signal of the attenuator to be gradually reduced with the elapse of time; and a subtractor which subtracts an output of the first amplifying circuit and an output of the second amplifying circuit.
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公开(公告)号：US20200022682A1
公开(公告)日：2020-01-23
申请号：US16361887
申请日：2019-03-22
Applicant: Hitachi, Ltd.
Inventor： Takuya KANEKO , Shinya KAJIYAMA
Abstract: An electronic circuit in an ultrasonic probe includes a plurality of sub beamformers and a control unit. Each sub beamformer includes M delay circuits and an adding circuit. Each delay circuit includes a memory cell array which is formed of N memory cells. Conditions of cyclic operations of the M memory cell arrays (for example, timings of start triggers) are made irregular, such that use starting stage numbers in the M memory cell arrays are different.
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Patent Agency Ranking
公开(公告)号：US20190328369A1
公开(公告)日：2019-10-31
申请号：US16361858
申请日：2019-03-22
Applicant: Hitachi, Ltd.
Inventor： Yutaka IGARASHI , Shinya KAJIYAMA , Yohei NAKAMURA , Kengo IMAGAWA , Kazuhiro AMINO , Takayuki IWASHITA
Abstract: Provided is a probe which transmits an ultrasonic wave to a diagnostic site and receives a reception signal which is a reflected wave. The probe includes: a plurality of transducers; a plurality of low-noise amplifying circuits respectively corresponding to the plurality of transducers; and a single differential converter which converts a control signal rising with the elapse of time to a first bias signal rising with the elapse of time and a second bias signal falling with the elapse of time to control the plurality of low-noise amplifying circuits, and the low-noise amplifying circuit includes an attenuator which attenuates: an electric signal from the transducer; a first amplifying circuit which sets the first bias signal as a bias and amplifies an output signal of the attenuator to be gradually increased with the elapse of time; a second amplifying circuit which sets the second bias signal as a bias and amplifies the output signal of the attenuator to be gradually reduced with the elapse of time; and a subtractor which subtracts an output of the first amplifying circuit and an output of the second amplifying circuit.
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公开(公告)号：US20210386401A1
公开(公告)日：2021-12-16
申请号：US17229916
申请日：2021-04-14
Applicant: HITACHI, LTD.
Inventor： Shinya KAJIYAMA , Yoshihiro HAYASHI , Tadahiro NABETA
Abstract: Provided are a two-dimensional array ultrasonic probe and an addition circuit that switch an addition unit of a reception signal according to a reception channel of a main unit while preventing an increase in a chip area. The addition circuit includes, between addition output terminals that output an addition signal and transducer channels, wirings provided for each transducer channel row including the transducer channels arranged in a vertical direction on a subarray basis and coupled to the transducer channels of the corresponding transducer channel row, output switches provided for each of the wirings and coupled to the corresponding transducer channel row wiring, and an inter-output switch that couples wirings corresponding to transducer channel rows adjacent in the horizontal direction via the output switches.
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公开(公告)号：US20210362187A1
公开(公告)日：2021-11-25
申请号：US17184730
申请日：2021-02-25
Applicant: Hitachi, Ltd.
Inventor： Yutaka IGARASHI , Shinya KAJIYAMA , Kengo IMAGAWA
Abstract: An ultrasonic probe including: a plurality of transducers; a plurality of low-noise amplifier circuits individually corresponding to the plurality of transducers, the plurality of low-noise amplifier circuits having a variable resistor feedback unit making a resistance value variable by an electrical signal inputted to a control terminal; and a control circuit; wherein the control circuit has a dummy circuit generating a bias voltage of a feedback unit of the low-noise amplifier circuit, and an adding circuit outputting an added signal of a bias voltage by the dummy circuit and a control signal increasing or decreasing with a lapse of time; and the plurality of low-noise amplifier circuits input an output of the adding circuit to the control terminal of the variable resistor feedback unit to perform variable control on a gain of the low-noise amplifier circuit.
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公开(公告)号：US20180192994A1
公开(公告)日：2018-07-12
申请号：US15763124
申请日：2016-10-04
Applicant: Hitachi, Ltd.
Inventor： Yusaku KATSUBE , Tatsuo NAKAGAWA , Yasuyuki OKUMA , Yohei NAKAMURA , Takahide TERADA , Shinya KAJIYAMA , Takuma NISHIMOTO , Yutaka IGARASHI
CPC classification number: A61B8/4483 , A61B8/14 , A61B8/4461 , A61B8/461 , B06B1/0207 , G01S7/5208 , G01S15/8927
Abstract: An ultrasound diagnosis device includes: an ultrasound probe which transmits an ultrasound wave toward a examinee and receives a reflected wave from the examinee; and a main device which controls the transmitting and receiving of the ultrasound waves from the ultrasound probe and is operated to receive a receiving signal obtained by receiving the reflected wave from the examinee by the ultrasound probe, to generate an ultrasound image of the examinee, and to display the ultrasound image on a display screen, wherein the ultrasound probe includes a plurality of subarrays having a plurality of element circuits transmitting and receiving ultrasound signals and a plurality of reference voltage sources, and the plurality of subarrays and the plurality of reference voltage sources have a one-to-one correspondence.
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10.发明申请公开(公告)号：US20180035974A1
公开(公告)日：2018-02-08
申请号：US15553197
申请日：2016-02-25
Applicant: Hitachi, Ltd.
Inventor： Shinya KAJIYAMA , Yutaka IGARASHI , Yusaku KATSUBE , Takuma NISHIMOTO
Abstract: A test for screening defects of a transmission/reception circuit in an IC is enabled at low cost, without withstand voltage violation, and without carrying out electrical contacts with many terminals connected to oscillators. In a transmission/reception separation switch circuit using transistors as switch elements, a potential of a gate is lowered in a test more than the potential in a case of reception to avoid gate-source withstand-voltage violation when a large-amplitude signal is input, and an internal-signal loopback test is carried out without destroying a reception circuit.
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