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Patent Agency Ranking
公开(公告)号：US20190074845A1
公开(公告)日：2019-03-07
申请号：US15924945
申请日：2018-03-19
Applicant: Hitachi, Ltd.
Inventor： Yohei NAKAMURA , Taizo YAMAWAKI
Abstract: The resolution of a successive approximation analog-to-digital converter is varied in a wide range. Provided is a successive approximation analog-to-digital converter including a digital-to-analog converter that generates an analog voltage based on a digital code, a comparator to which the analog voltage as the output of the digital-to-analog converter is inputted, a DAC control circuit that generates the digital code of an input voltage sampled from an external clock signal by successively changing the digital code based on the output of the comparator, a delay circuit that starts the determination of the comparator by signal transition generated by delaying the signal state change of the output of the comparator, a clock generation circuit that generates a signal starting the determination of the comparator, and a selector circuit that selects a signal generated by the delay circuit or a signal generated by the clock generation circuit to feed the selected signal to the comparator.
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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：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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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：US20190199366A1
公开(公告)日：2019-06-27
申请号：US16225790
申请日：2018-12-19
Applicant: HITACHI, LTD.
Inventor： Yohei NAKAMURA , Taizo YAMAWAKI
Abstract: Provided is a sensor terminal including a sensor element, the sensor terminal further including: an ADC that converts an analog signal output from a sensor element into a digital signal; a storage device in which a plurality of first storage setting numbers being information for controlling the ADC and a plurality of pieces of first characteristic information including description of operation of the ADC are stored in association with each other; and a communication device that receives a first reception setting number from the outside of the sensor terminal, and transmits the first characteristic information corresponding to the first storage setting number that coincides with the first reception setting number, to the outside of the sensor terminal.
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