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    Tunable phase shifter having wide instantaneous bandwidth
    1.
    发明授权
    Tunable phase shifter having wide instantaneous bandwidth 失效
    具有宽瞬时带宽的可调谐移相器

    公开(公告)号：US4978931A

    公开(公告)日：1990-12-18

    申请号：US363247

    申请日：1989-06-08

    申请人： Stuart L. Carp ,  Allen P. Edwards

    发明人： Stuart L. Carp ,  Allen P. Edwards

    IPC分类号： H03H7/20

    CPC分类号： H03H7/20

    摘要： A phase shifter providing constant group delay and a wide instantaneous bandwidth is taught. In one embodiment, an input port is connected to an output port with a power splitter formed of a transformer connected between the input port and the output port, and having a center tap serving as a sum port. An impedance, such as a resistor, is connected in parallel with the transformer between the input port and the output port. A reactive network is connected between the sum port and ground, including one or more variable reactance device, such as a varactor, which alter the reactance of the reactive network in response to a control signal. Additional reactive elements are included in the reactive network to provide additional poles and zeros which change frequency in response to the variable reactance elements, in order to provide a group delay which is constant for various reactance values provided by the reactive network between the lowest frequency of interest and a higher frequency of interest.

    摘要翻译： 教授提供恒定组延迟和宽瞬时带宽的移相器。 在一个实施例中，输入端口连接到具有由连接在输入端口和输出端口之间的变压器形成的功率分配器的输出端口，并且具有用作和口的中心抽头。 诸如电阻器的阻抗在输入端口和输出端口之间与变压器并联连接。 无源网络连接在和端口和地之间，包括一个或多个可变电抗器件，例如变容二极管，其响应于控制信号改变无功网络的电抗。 额外的无功元件被包括在无功网络中以提供响应于可变电抗元件而改变频率的附加极点和零点，以便提供对于由无功网络提供的各种电抗值的群延迟最小频率 兴趣和兴趣较高的频率。

    Medical ultrasonic diagnostic imaging method and apparatus
    2.
    发明授权
    Medical ultrasonic diagnostic imaging method and apparatus 有权
    医用超声诊断成像方法及装置

    公开(公告)号：US06193659B1

    公开(公告)日：2001-02-27

    申请号：US09282397

    申请日：1999-03-31

    申请人： Bhaskar S. Ramamurthy ,  Charles Bradley ,  Ken Sawatari ,  Danhua Zhao ,  Stuart L. Carp ,  Stirling S. Dodd ,  David J. Hedberg ,  Samuel H. Maslak ,  Daniel E. Need

    发明人： Bhaskar S. Ramamurthy ,  Charles Bradley ,  Ken Sawatari ,  Danhua Zhao ,  Stuart L. Carp ,  Stirling S. Dodd ,  David J. Hedberg ,  Samuel H. Maslak ,  Daniel E. Need

    IPC分类号： A61B800

    CPC分类号： A61B8/481 ,  G01S7/5202 ,  G01S7/52038 ,  G01S15/8915 ,  G01S15/8927 ,  G01S15/895

    摘要： An improvement to the method for harmonic imaging including the steps of (a) transmitting ultrasonic energy at a fundamental frequency and (b) receiving reflected ultrasonic energy at a harmonic of the fundamental frequency is provided. The transmitting step includes the step of: applying the plurality of waveforms to a respective plurality of transducer elements, a first waveform of the plurality of waveforms characterized by a first value of a harmonic power ratio, waveforms transmitted from the transducer elements and corresponding to the plurality of waveforms summing as an acoustic waveform substantially at the point, the acoustic waveform characterized by a second value of the harmonic power ratio less than the first value. The imaging method can also include a step for subdividing the transmit aperture into two or more subapertures, each subaperture having at least four adjacent transducer elements. The subapertures are phased differently with respect to one another to selectively reduce either fundamental components or harmonic components of echoes from tissue. These techniques can be used to improve contrast agent harmonic imaging as well as tissue harmonic imaging, depending upon the phase shift selected.

    摘要翻译： 提供了一种对谐波成像方法的改进，包括以下步骤：（a）以基频传输超声波能量;（b）在基频谐波处接收反射的超声波能量。 发送步骤包括以下步骤：将多个波形应用于相应的多个换能器元件，所述多个波形的第一波形以谐波功率比的第一值为特征，从换能器元件发送的波形对应于 多个波形基本上在该点处作为声波形求和，声波特征在于小于第一值的谐波功率比的第二值。 成像方法还可以包括将发射孔分成两个或更多个子孔径的步骤，每个子孔径具有至少四个相邻的换能器元件。 子孔径相对于彼此不同地相位选择性地降低来自组织的回波的基本分量或谐波分量。 这些技术可以用于根据选择的相移来改善造影剂谐波成像以及组织谐波成像。

    Rotary transformer
    4.
    发明授权
    Rotary transformer 有权
    旋转变压器

    公开(公告)号：US08378771B2

    公开(公告)日：2013-02-19

    申请号：US11961912

    申请日：2007-12-20

    申请人： Donald Masters ,  Stuart L. Carp ,  Peter Thornton

    发明人： Donald Masters ,  Stuart L. Carp ,  Peter Thornton

    IPC分类号： H01F21/00

    CPC分类号： H01F21/06 ,  A61B8/12 ,  A61B8/4461 ,  A61B2562/227 ,  H01F27/02 ,  H01F38/18

    摘要： Described herein are rotary transformers for coupling signals between components that rotate relative to one another. In an exemplary embodiment, a rotary transformer comprises a rotary shaft, a first magnetic core on the rotary shaft, and a first winding wound around the first magnetic core. The rotary transformer further comprises a hollow second magnetic core, and a second winding wound along the inner wall of the second magnetic core. During operation, the first winding on the rotary shaft rotates within the second winding with the magnetic cores magnetically coupling signals between the two windings. Also, the first and second windings are closely spaced to provide capacitive coupling between the windings that extends the frequency response of the transformer. In one embodiment, the windings comprises substantially flat conductors wound in the shape of the windings. In another embodiment, each of the windings comprises circular loops connected by jogs.

    摘要翻译： 这里描述的是用于在相对于彼此旋转的部件之间耦合信号的旋转变压器。 在示例性实施例中，旋转变压器包括旋转轴，旋转轴上的第一磁芯和围绕第一磁芯缠绕的第一绕组。 旋转变压器还包括中空的第二磁芯和沿着第二磁芯的内壁缠绕的第二绕组。 在操作期间，旋转轴上的第一绕组在第二绕组内旋转，磁芯在两个绕组之间磁耦合信号。 此外，第一和第二绕组紧密间隔以提供绕组之间的电容耦合，其延伸变压器的频率响应。 在一个实施例中，绕组包括缠绕成绕组形状的基本平坦的导体。 在另一个实施例中，每个绕组包括通过点动连接的圆形回路。

    Diagnostic medical ultrasound systems and transducers utilizing micro-mechanical components
    5.
    发明授权
    Diagnostic medical ultrasound systems and transducers utilizing micro-mechanical components 有权
    使用微机械部件的诊断医疗超声系统和换能器

    公开(公告)号：US06773401B1

    公开(公告)日：2004-08-10

    申请号：US09824314

    申请日：2001-04-02

    申请人： William R. Dreschel ,  Terry Kling ,  John W. Sliwa ,  Stuart L. Carp

    发明人： William R. Dreschel ,  Terry Kling ,  John W. Sliwa ,  Stuart L. Carp

    IPC分类号： A61B800

    CPC分类号： B06B1/00 ,  A61B8/4483 ,  H01H59/0009

    摘要： The use of any micro-mechanical component in an ultrasound system is disclosed. In particular, the use of micro-relays, micro-switches and inductors in the transducer probe head, in the transducer connector, coupled with the system transducer connector(s) or anywhere else in the system. In an ultrasound system, micro-mechanical components such as micro-fabricated switches, relays and inductors permit impressive size reduction, cost reduction, signal-integrity enhancement and improved operational flexibility.

    摘要翻译： 公开了在超声系统中使用任何微机械部件。 特别地，在换能器探头中，在换能器连接器中使用微型继电器，微型开关和电感器，与系统换能器连接器或系统中的任何其他地方相结合。 在超声系统中，诸如微型开关，继电器和电感器的微机械部件允许显着的尺寸减小，成本降低，信号完整性增强和改进的操作灵活性。

    Diagnostic medical ultrasound systems and transducers utilizing micro-mechanical components
    8.
    发明授权
    Diagnostic medical ultrasound systems and transducers utilizing micro-mechanical components 有权
    使用微机械部件的诊断医疗超声系统和换能器

    公开(公告)号：US07549962B2

    公开(公告)日：2009-06-23

    申请号：US10368774

    申请日：2003-02-18

    申请人： William R. Dreschel ,  Terry Kling ,  John W. Sliwa ,  Stuart L. Carp

    发明人： William R. Dreschel ,  Terry Kling ,  John W. Sliwa ,  Stuart L. Carp

    IPC分类号： A61B8/00

    CPC分类号： B06B1/00 ,  A61B8/4483 ,  H01H59/0009

    摘要： The use of any micro-mechanical component in an ultrasound system is disclosed. In particular, the use of micro-relays, micro-switches and inductors in the transducer probe head, in the transducer connector, coupled with the system transducer connector(s) or anywhere else in the system. In an ultrasound system, micro-mechanical components such as micro-fabricated switches, relays and inductors permit impressive size reduction, cost reduction, signal-integrity enhancement and improved operational flexibility.

    摘要翻译： 公开了在超声系统中使用任何微机械部件。 特别地，在换能器探头中，在换能器连接器中使用微型继电器，微型开关和电感器，与系统换能器连接器或系统中的任何其他地方相结合。 在超声系统中，诸如微型开关，继电器和电感器的微机械部件允许显着的尺寸减小，成本降低，信号完整性增强和改进的操作灵活性。