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

IPC: A61B8/00 ,  A61B8/08

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.

公开(公告)号：US20160120516A1

公开(公告)日：2016-05-05

申请号：US14898675

申请日：2014-05-30

Applicant: HITACHI, LTD.

Inventor： Kengo IMAGAWA ,  Yutaka IGARASHI ,  Toru YAZAKI

IPC: A61B8/00 ,  A61B8/14 ,  A61B8/08

CPC classification number: A61B8/56 ,  A61B8/08 ,  A61B8/145 ,  A61B8/4488 ,  A61B8/4494 ,  A61B8/465 ,  A61B8/5207 ,  A61B8/58 ,  G01S7/52033 ,  G01S7/52038 ,  G01S15/8925 ,  G01S15/8927 ,  G01S15/8963

Abstract: An objective of the present invention is to provide an ultrasound system which can correct a positive-negative asymmetry in pulse inversion (PI) and obtain a high-image quality ultrasound image. To carryout an asymmetry correction of a transmission assembly circuit comprising an oscillation adjustment amplifier (10) and an ultrasound oscillator array (90), correction data obtained in a calibration mode is stored in a correction memory (46), and positive-negative asymmetry of an overall receiving assembly circuit comprising a computation unit (45) is corrected in a diagnostic mode of the device using the correction data.

Abstract translation: 本发明的目的是提供一种可以校正脉冲反转（PI）中的正负不对称性并获得高图像质量的超声图像的超声系统。 为了进行包括振荡调节放大器（10）和超声波振荡器阵列（90）的传输组合电路的不对称校正，校正模式中获得的校正数据被存储在校正存储器（46）中，正负不对称性 包括计算单元（45）的整体接收组件电路在使用校正数据的设备的诊断模式下被校正。

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

IPC: A61B8/00 ,  B06B1/02 ,  H03F3/45 ,  B06B3/00

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.

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

IPC: B06B1/02 ,  A61B8/00 ,  A61B8/08 ,  G01S15/89

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.

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

IPC: A61B8/00 ,  A61B8/14

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.

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

IPC: A61B8/00 ,  H04B17/29 ,  H04B17/15 ,  A61B8/08

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.

公开(公告)号：US20170188996A1

公开(公告)日：2017-07-06

申请号：US15313147

申请日：2014-06-13

Applicant: HITACHI, LTD.

Inventor： Shinya KAJIYAMA ,  Yutaka IGARASHI ,  Toru YAZAKI

IPC: A61B8/00 ,  H03K17/10 ,  H03K3/012 ,  A61B8/08

Abstract: A transmit receive switch circuit has a first MOSFET (MN1) and a second MOSFET (MN2), goes into a switch-off state at the time of transmission, and goes into a switch-on state at the time of reception. The first MOSFET (MN1) and the second MOSFET (MN2) are connected between an input terminal (SWIN) and an output terminal (SWOUT). The switch circuit includes a shunt circuit (SHNT) that is connected between a common gate (COMG) and a common source (COMS), the common gate being connected to the gates of the first and second MOSFETs, and the common source being connected to the sources of the first and second MOSFETs. When a signal having a negative voltage relative to a reference voltage is applied to the input terminal, a switch that temporarily turns on causes the shunt circuit to short-circuit the common gate and the common source.

公开(公告)号：US20170150945A1

公开(公告)日：2017-06-01

申请号：US15315696

申请日：2014-06-06

Applicant: HITACHI, LTD.

Inventor： Takuma NISHIMOTO ,  Yutaka IGARASHI ,  Yusaku KATSUBE ,  Kengo IMAGAWA

IPC: A61B8/00 ,  H03K5/159 ,  H03K19/0175 ,  H03K5/003

CPC classification number: A61B8/4461 ,  A61B8/00 ,  A61B8/461 ,  A61B8/467 ,  A61B8/54 ,  A61B8/56 ,  H03K3/012 ,  H03K4/94 ,  H03K5/003 ,  H03K5/159 ,  H03K19/017509

Abstract: Amplification of a signal by a small circuit size and reduction of a power are achieved.A current controlling current source unit 53 changes an outputting current based on a transition time setting signal tp. A current controlling current source unit 54 changes a drawing current based on a transition time setting signal tn. An amplitude control unit 55 changes a power source voltage supplied to the current controlling current source unit 53 and changes amplitude of a voltage generated by a current outputted from the current controlling current source unit 53, based on amplitude setting signal ap. An amplitude control unit 56 changes a power source voltage supplied to the current controlling current source unit 54 and changes amplitude of a voltage generated by the current drawn by the current controlling current source unit 54, based on amplitude setting signal an. The buffer unit 57 drives a load in accordance with the current outputted from the current controlling current source unit 53 and the current drawn from the current controlling current source unit 54.

公开(公告)号：US20160310104A1

公开(公告)日：2016-10-27

申请号：US15102542

申请日：2014-11-28

Applicant: HITACHI, LTD.

Inventor： Takuma NISHIMOTO ,  Yutaka IGARASHI ,  Toru YAZAKI ,  Kengo IMAGAWA ,  Yusaku KATSUBE

IPC: A61B8/00 ,  B06B1/06 ,  G01S15/89 ,  B06B1/02

CPC classification number: A61B8/4488 ,  A61B8/14 ,  A61B8/4405 ,  A61B8/4444 ,  A61B8/4494 ,  B06B1/0215 ,  B06B1/0622 ,  B06B2201/76 ,  G01S15/8925 ,  G01S15/8927 ,  G10K11/346

Abstract: Provided are an ultrasound probe, an element circuit thereof, and an ultrasound diagnostic device, whereby high image quality is possible and reduced size and lower cost are made possible. Provided is an ultrasound probe, comprising: a 2-D array transducer wherein a plurality of transducers are arrayed two-dimensionally; and a 2-D array IC in which are formed, upon an IC substrate, drive circuits which are disposed upon each of the transducers of the 2-D array transducer to drive each of the transducers at different timings with a prescribed delay quantity, and common current sources which supply drive current to the transducers of the 2-D array transducer. The number n of the common current sources which are formed upon the IC substrate is fewer than the number N of the drive circuits which are formed upon the IC substrate.

Abstract translation: 提供了一种超声波探头，其元件电路和超声诊断装置，由此可以实现高图像质量，并且可以减小尺寸并降低成本。 提供了一种超声波探头，包括：二维阵列换能器，其中多个换能器二维排列; 以及二维阵列IC，其中在IC基板上形成驱动电路，所述驱动电路设置在二维阵列换能器的每个换能器上，以规定的延迟量在不同的定时驱动每个换能器;以及 向2维阵列换能器的换能器提供驱动电流的公共电流源。 在IC基板上形成的公共电流源的数量n小于形成在IC基板上的驱动电路的数量N。