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：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：US20210186461A1

公开(公告)日：2021-06-24

申请号：US16622135

申请日：2018-05-18

Applicant: HITACHI, LTD.

Inventor： Hidetsugu KATSURA ,  Tomohiro SHIRAISHI ,  Takayuki IWASHITA

IPC: A61B8/00 ,  B06B1/06 ,  H01L41/04 ,  H01L41/047 ,  G01S15/89

Abstract: A backing 20 includes a lead array 24a that electrically connects each vibration element 12 and a plurality of ICs 32. Each bump 42 provided at a lower end portion of each lead 24 is connected to a conductor pad on an upper side surface of a relay substrate 26, and a ball-shaped terminal 44 of each IC 32 is connected to a lower surface of the relay substrate 26. The lower end portions of the leads 24 are grouped into a plurality of dense groups 46 corresponding to each IC 32 in a longitudinal direction (X-axis direction) by wiring patterns of the leads.