- 专利标题: Ultrasonic probe and ultrasonic diagnostic apparatus using thereon
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申请号: US17184730申请日: 2021-02-25
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公开(公告)号: US11921241B2公开(公告)日: 2024-03-05
- 发明人: Yutaka Igarashi , Shinya Kajiyama , Kengo Imagawa
- 申请人: Hitachi, Ltd.
- 申请人地址: JP Tokyo
- 专利权人: FUJIFILM HEALTHCARE CORPORATION
- 当前专利权人: FUJIFILM HEALTHCARE CORPORATION
- 当前专利权人地址: JP Chiba
- 代理机构: Mattingly & Malur, PC
- 优先权: JP 20090443 2020.05.25
- 主分类号: G01S7/52
- IPC分类号: G01S7/52 ; G01S15/89
摘要:
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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