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公开(公告)号：US10114114B2
公开(公告)日：2018-10-30
申请号：US14669651
申请日：2015-03-26
摘要： An ultrasonic probe includes: an ultrasonic transducer; an amplification stage; a bias circuit, which determines a bias voltage on an input terminal of the amplification stage; and a selector having an intermediate node, a high-voltage switch between the intermediate node and the transducer, and a first low-voltage switch between the intermediate node and the input terminal. A control unit controls the high-voltage switch and the first low-voltage switch so as to alternately couple and decouple the amplification stage and the transducer. A precharge circuit determines a precharge voltage on the intermediate node as a function of the bias voltage, before the amplification stage and the transducer are coupled.
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公开(公告)号：US09772645B2
公开(公告)日：2017-09-26
申请号：US15076211
申请日：2016-03-21
CPC分类号： G05F3/02 , B06B1/0215 , H03K4/94 , H03K17/162
摘要： A transmission channel transmits high-voltage pulses and receives echos of the high-voltage pulses. The transmission channel includes a current generator circuit, which generates current-integrator drive currents. The control circuitry generates one or more control signals to control generation of current-integrator drive currents by the current generator circuit during transducer-driving periods. A current integrator integrates current-integrator drive currents generated by current generator circuit to generate transducer drive signals.
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3.发明申请ULTRASONIC PROBE WITH PRECHARGE CIRCUIT AND METHOD OF CONTROLLING AN ULTRASONIC PROBE 审中-公开带前置电路的超声波探头及超声波探头的控制方法公开(公告)号：US20160077198A1
公开(公告)日：2016-03-17
申请号：US14669651
申请日：2015-03-26
IPC分类号： G01S7/52
CPC分类号： G01S7/52023 , G01N29/34 , G01N29/36 , G01N2291/106 , H03F1/301 , H03F3/70 , H03F2200/453 , H03F2200/456
摘要： An ultrasonic probe includes: an ultrasonic transducer; an amplification stage; a bias circuit, which determines a bias voltage on an input terminal of the amplification stage; and a selector having an intermediate node, a high-voltage switch between the intermediate node and the transducer, and a first low-voltage switch between the intermediate node and the input terminal. A control unit controls the high-voltage switch and the first low-voltage switch so as to alternately couple and decouple the amplification stage and the transducer. A precharge circuit determines a precharge voltage on the intermediate node as a function of the bias voltage, before the amplification stage and the transducer are coupled.
摘要翻译： 超声波探头包括：超声换能器; 放大级; 偏置电路，其确定放大级的输入端上的偏置电压; 以及具有中间节点，中间节点和换能器之间的高压开关以及中间节点和输入端子之间的第一低压开关的选择器。 控制单元控制高压开关和第一低压开关，以交替地耦合和去耦放大级和换能器。 在放大级和换能器耦合之前，预充电电路确定中间节点上的预充电电压作为偏置电压的函数。
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公开(公告)号：US11807519B2
公开(公告)日：2023-11-07
申请号：US17337296
申请日：2021-06-02
发明人： Domenico Giusti , Fabio Quaglia
CPC分类号： B81B7/0016 , B81C1/00825 , F16F15/007 , B81B2203/0118 , B81B2203/0127 , B81B2203/0307 , B81B2207/03 , B81C2203/032 , F16F2226/042
摘要： A microelectromechanical membrane transducer includes: a supporting structure; a cavity formed in the supporting structure; a membrane coupled to the supporting structure so as to cover the cavity on one side; a cantilever damper, which is fixed to the supporting structure around the perimeter of the membrane and extends towards the inside of the membrane at a distance from the membrane; and a damper piezoelectric actuator set on the cantilever damper and configured so as to bend the cantilever damper towards the membrane in response to an electrical actuation signal.
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公开(公告)号：US10145728B2
公开(公告)日：2018-12-04
申请号：US14750312
申请日：2015-06-25
摘要： Described herein is a transceiver circuit for a capacitive micromachined ultrasonic transducer (CMUT), provided with: a transmitter stage, which generates excitation pulses for a first node of the CMUT transducer during a transmitting phase, a second node of the CMUT transducer being coupled to a biasing voltage; a receiver stage that is selectively coupled to the first node during a receiving phase and has an amplification stage; a switching stage that couples the receiver stage to the first node during the receiving phase and decouples the receiver stage from the first node during the transmitting phase. The amplification stage is provided with a charge amplifier that has an input terminal and is biased as a function of a biasing voltage; and the switching stage is coupled to the same biasing voltage thereby minimizing an injection of charge into the input terminal upon switching from the transmitting phase to the receiving phase.
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公开(公告)号：US09323270B1
公开(公告)日：2016-04-26
申请号：US14553749
申请日：2014-11-25
IPC分类号： G05F3/02
CPC分类号： G05F3/02 , B06B1/0215 , H03K4/94 , H03K17/162
摘要： A transmission channel transmits high-voltage pulses and receives echos of the high-voltage pulses. The transmission channel includes a current generator circuit, which generates current-integrator drive currents, a receiver, which amplifies transducer-echo signals, and control circuitry. The control circuitry generates one or more control signals to control generation of current-integrator drive currents by the current generator circuit during transducer-driving periods and reception of transducer-echo signals by the receiver during echo-reception periods. A current integrator integrates current-integrator drive currents generated by current generator circuit to generate transducer drive signals.
摘要翻译： 传输通道传输高电压脉冲并接收高电压脉冲的回波。 传输通道包括产生电流积分器驱动电流的电流发生器电路，放大换能器回波信号的接收器和控制电路。 控制电路产生一个或多个控制信号，以在换能器驱动期间由电流发生器电路控制电流积分器驱动电流的产生，并且在回波接收周期期间由接收器接收换能器 - 回波信号。 电流积分器集成了由电流发生器电路产生的电流积分器驱动电流以产生换能器驱动信号。
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公开(公告)号：US11600765B2
公开(公告)日：2023-03-07
申请号：US17137220
申请日：2020-12-29
发明人： Domenico Giusti , Carlo Luigi Prelini , Marco Ferrera , Carla Maria Lazzari , Luca Seghizzi , Nicolo′ Boni , Roberto Carminati , Fabio Quaglia
摘要： The MEMS actuator is formed by a substrate, which surrounds a cavity; by a deformable structure suspended on the cavity; by an actuation structure formed by a first piezoelectric region of a first piezoelectric material, supported by the deformable structure and configured to cause a deformation of the deformable structure; and by a detection structure formed by a second piezoelectric region of a second piezoelectric material, supported by the deformable structure and configured to detect the deformation of the deformable structure.
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公开(公告)号：US09853617B2
公开(公告)日：2017-12-26
申请号：US15168832
申请日：2016-05-31
发明人： Marco Sautto , Fabio Quaglia , Giulio Ricotti , Andrea Mazzanti
CPC分类号： H03G1/0094 , H03F3/005 , H03F3/2175 , H03F3/45 , H03F3/45264 , H03F2200/312 , H03F2203/45288
摘要： A programmable-gain amplifier includes: two complementary cross-coupled transistor pairs mutually coupled with each transistor in one pair having a current flow path cascaded with a current flow path of a respective one of the transistors in the other pair. First and second coupling points are formed between the pairs; with first and second sampling capacitors coupled thereto. First and second input stages have input terminals to input signals for sampling by the first and second sampling capacitors. Switching means couple the first and second input stages to the sampling capacitors so the input signals are sampled as sampled signals on the sampling capacitors. The switching means energizes the complementary cross-coupled transistor pairs so the signals sampled on the sampling capacitors undergo negative resistance regeneration growing exponentially over time to thereby provide an exponential amplifier gain.
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公开(公告)号：US20170179897A1
公开(公告)日：2017-06-22
申请号：US15168832
申请日：2016-05-31
发明人： Marco Sautto , Fabio Quaglia , Giulio Ricotti , Andrea Mazzanti
CPC分类号： H03G1/0094 , H03F3/005 , H03F3/2175 , H03F3/45 , H03F3/45264 , H03F2200/312 , H03F2203/45288
摘要： A programmable-gain amplifier includes: two complementary cross-coupled transistor pairs mutually coupled with each transistor in one pair having a current flow path cascaded with a current flow path of a respective one of the transistors in the other pair. First and second coupling points are formed between the pairs; with first and second sampling capacitors coupled thereto. First and second input stages have input terminals to input signals for sampling by the first and second sampling capacitors. Switching means couple the first and second input stages to the sampling capacitors so the input signals are sampled as sampled signals on the sampling capacitors. The switching means energizes the complementary cross-coupled transistor pairs so the signals sampled on the sampling capacitors undergo negative resistance regeneration growing exponentially over time to thereby provide an exponential amplifier gain.
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公开(公告)号：US20160204778A1
公开(公告)日：2016-07-14
申请号：US15076211
申请日：2016-03-21
IPC分类号： H03K17/16
CPC分类号： G05F3/02 , B06B1/0215 , H03K4/94 , H03K17/162
摘要： A transmission channel transmits high-voltage pulses and receives echos of the high-voltage pulses. The transmission channel includes a current generator circuit, which generates current-integrator drive currents. The control circuitry generates one or more control signals to control generation of current-integrator drive currents by the current generator circuit during transducer-driving periods. A current integrator integrates current-integrator drive currents generated by current generator circuit to generate transducer drive signals.
摘要翻译： 传输通道传输高电压脉冲并接收高电压脉冲的回波。 传输通道包括产生电流积分器驱动电流的电流发生器电路。 控制电路产生一个或多个控制信号，以在换能器驱动期间通过电流发生器电路来控制电流积分器驱动电流的产生。 电流积分器集成了由电流发生器电路产生的电流积分器驱动电流以产生换能器驱动信号。
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