公开(公告)号：US20070236374A1

公开(公告)日：2007-10-11

申请号：US11731568

申请日：2007-03-30

申请人： Daniel Brueske ,  D-L Liu ,  Steven Martin ,  Brian Colby

发明人： Daniel Brueske ,  D-L Liu ,  Steven Martin ,  Brian Colby

IPC分类号： H03M3/00

CPC分类号： G01S7/52028 ,  G01S7/5205 ,  G01S7/5208 ,  G01S7/52095 ,  G01S15/8979

摘要： Ultrasound information for B-mode and CW Doppler mode use the same digital beamformer. Due to sigma-delta conversion or over sampling, sufficient dynamic range is provided for the desired bandwidth. By mixing the input ultrasound information to base band before conversion, additional dynamic range may be provided. The electrical impedance may be better matched to elements by connecting a different number of sigma-delta converters to an element. Elements with lower impedance may be connected to a plurality of sigma-delta converters. To increase the aperture size for elements with a higher impedance, the same sigma-delta converters may be used as separate receive beamformer channels without the summation.

摘要翻译： B模式和CW多普勒模式的超声信息使用相同的数字波束形成器。 由于Σ-Δ转换或过采样，为期望的带宽提供足够的动态范围。 通过将输入超声信息与转换之前的基带混合，可以提供额外的动态范围。 通过将不同数量的Σ-Δ转换器连接到元件，电阻抗可以更好地匹配元件。 具有较低阻抗的元件可以连接到多个Σ-Δ转换器。 为了增加具有更高阻抗的元件的孔径尺寸，可以将相同的Σ-Δ转换器用作单独的接收波束形成器通道而不需要求和。

公开(公告)号：US20070229336A1

公开(公告)日：2007-10-04

申请号：US11731567

申请日：2007-03-30

申请人： D-L Liu ,  Daniel Brueske ,  Brian Colby

发明人： D-L Liu ,  Daniel Brueske ,  Brian Colby

IPC分类号： H03M3/00

CPC分类号： G10K11/346 ,  G01S7/52025 ,  G01S7/52034 ,  G01S7/5208 ,  G01S7/52095

摘要： Receive beamformers for receive beamforming ultrasound information include a plurality of channels. The received signals for each channel are oversampled for conversion to digital form, such as sampling with a sigma-delta converter. The reconstruction of the samples into data at the Nyquist or other rate is performed in stages. Partial reconstruction to a rate less than the oversampling rate, but greater than the Nyquist rate, occurs prior to summation across channels. Delays are implemented by selecting data from the sample stream. After summation, the samples are reconstructed at a Nyquist or other rate.

摘要翻译： 用于接收波束形成超声信息的接收波束形成器包括多个信道。 每个通道的接收信号被过采样以便转换成数字形式，例如用Σ-Δ转换器进行采样。 以奈奎斯特或其他速率将样本重建为数据分阶段进行。 部分重建的速率小于过采样率，但大于奈奎斯特速率，则发生在跨通道求和之前。 通过从样本流中选择数据来实现延迟。 在求和之后，以奈奎斯特或其他速率重建样本。

公开(公告)号：US20070030067A1

公开(公告)日：2007-02-08

申请号：US11197929

申请日：2005-08-05

申请人： Daniel Brueske

发明人： Daniel Brueske

IPC分类号： G06G7/24

CPC分类号： G06G7/24

摘要： A system for producing a control signal to a plurality of amplifiers sections to vary the gain of each one of the plurality of amplifier sections as a linear natural logarithmic function of an input gain control signal. The system includes a master circuit for producing a pair of currents with a ratio proportional to the linear natural logarithmic function of the input gain signal and a differential voltage. Each one of the amplifier sections includes: a replica of a portion of the master circuit fed by the produced differential voltage for producing a pair of currents produced in the master circuit; and an amplifier fed by the produced replicated currents, such amplifier having a gain proportional to the ratio of such replicated currents.

摘要翻译： 一种用于向多个放大器部分产生控制信号以将多个放大器部分中的每一个的增益改变为输入增益控制信号的线性自然对数函数的系统。 该系统包括用于产生与输入增益信号的线性自然对数函数和差分电压成比例的比例的一对电流的主电路。 每个放大器部分包括：由所产生的差分电压馈送的主电路的一部分的副本，用于产生在主电路中产生的一对电流; 以及由产生的复制电流馈送的放大器，这种放大器具有与这种复制电流的比例成比例的增益。

公开(公告)号：US20050040906A1

公开(公告)日：2005-02-24

申请号：US10643310

申请日：2003-08-19

申请人： Daniel Brueske ,  David Harnishfeger ,  Stephen Machan

发明人： Daniel Brueske ,  David Harnishfeger ,  Stephen Machan

IPC分类号： H03B5/20 ,  H03L7/00

CPC分类号： H03B5/20

摘要： A voltage controlled oscillator (VCO) for use in a personal area network synthesizer includes a delay cell (100), a first current amplifier (201, 203) for amplifying an input current, a resister capacitor (RC) tuning network (207, 209, 211) for varying the amount of amplification and delay of an output of the first current amplifier. A second current amplifier (213, 215) is then used for amplifying an output current from the RC tuning network. The invention includes a unique composite voltage variable capacitor (CVVC) (300) for precisely tuning the amount of delay presented by the delay cell. The unique topology of the delay cell (100) allows it to be readily used in voltage controlled oscillators (VCOs) operable at frequencies above 1 GHz.

摘要翻译： 用于个人区域网络合成器的压控振荡器（VCO）包括延迟单元（100），用于放大输入电流的第一电流放大器（201,203），电阻电容器（RC）调谐网络（207,209） ，211），用于改变第一电流放大器的输出的放大量和延迟量。 然后，第二电流放大器（213,215）用于放大来自RC调谐网络的输出电流。 本发明包括用于精确调节由延迟单元呈现的延迟量的独特的复合电压可变电容器（CVVC）（300）。 延迟单元（100）的独特拓扑允许其容易地用于在1GHz以上的频率下工作的压控振荡器（VCO）。

公开(公告)号：US07342451B2

公开(公告)日：2008-03-11

申请号：US11197929

申请日：2005-08-05

申请人： Daniel Brueske

发明人： Daniel Brueske

IPC分类号： H03F3/45

CPC分类号： G06G7/24

摘要： A system for producing a control signal to a plurality of amplifiers sections to vary the gain of each one of the plurality of amplifier sections as a linear natural logarithmic function of an input gain control signal. The system includes a master circuit for producing a pair of currents with a ratio proportional to the linear natural logarithmic function of the input gain signal and a differential voltage. Each one of the amplifier sections includes: a replica of a portion of the master circuit fed by the produced differential voltage for producing a pair of currents produced in the master circuit; and an amplifier fed by the produced replicated currents, such amplifier having a gain proportional to the ratio of such replicated currents.

摘要翻译： 一种用于向多个放大器部分产生控制信号以将多个放大器部分中的每一个的增益改变为输入增益控制信号的线性自然对数函数的系统。 该系统包括用于产生与输入增益信号的线性自然对数函数和差分电压成比例的比例的一对电流的主电路。 每个放大器部分包括：由所产生的差分电压馈送的主电路的一部分的副本，用于产生在主电路中产生的一对电流; 以及由产生的复制电流馈送的放大器，这种放大器具有与这种复制电流的比例成比例的增益。

公开(公告)号：US07477103B2

公开(公告)日：2009-01-13

申请号：US11198740

申请日：2005-08-05

申请人： Daniel Brueske ,  David A. Petersen

发明人： Daniel Brueske ,  David A. Petersen

IPC分类号： H03F3/45

CPC分类号： H03F3/189 ,  H03F3/68

摘要： An amplifier has a voltage to current converter coupled between a first potential and a reference potential and includes a control input coupled to a voltage at an input of the amplifier for converting the voltage at the amplifier input into a corresponding output current. A current multiplier is fed by the output current for producing an increased current. The increased current is fed to a control electrode of a transistor. A feedback element provides the first potential to the voltage to current converter by coupling a voltage produced by the feedback element in response current through the transistor to the voltage to current converter.

摘要翻译： 放大器具有耦合在第一电位和参考电位之间的电压 - 电流转换器，并且包括耦合到放大器输入处的电压的控制输入，用于将放大器输入处的电压转换成相应的输出电流。 电流乘法器由输出电流馈送以产生增加的电流。 增加的电流被馈送到晶体管的控制电极。 反馈元件通过将由反馈元件产生的电压通过晶体管的响应电流耦合到电压到电流转换器来向电压 - 电流转换器提供第一电位。

公开(公告)号：US20070030070A1

公开(公告)日：2007-02-08

申请号：US11198740

申请日：2005-08-05

申请人： Daniel Brueske ,  David Petersen

发明人： Daniel Brueske ,  David Petersen

IPC分类号： H03F3/45

CPC分类号： H03F3/189 ,  H03F3/68

摘要： An amplifier has a voltage to current converter coupled between a first potential and a reference potential and includes a control input coupled to a voltage at an input of the amplifier for converting the voltage at the amplifier input into a corresponding output current. A current multiplier is fed by the output current for producing an increased current. The increased current is fed to a control electrode of a transistor. A feedback element provides the first potential to the voltage to current converter by coupling a voltage produced by the feedback element in response current through the transistor to the voltage to current converter.

摘要翻译： 放大器具有耦合在第一电位和参考电位之间的电压 - 电流转换器，并且包括耦合到放大器输入处的电压的控制输入，用于将放大器输入处的电压转换成相应的输出电流。 电流乘法器由输出电流馈送以产生增加的电流。 增加的电流被馈送到晶体管的控制电极。 反馈元件通过将由反馈元件产生的电压通过晶体管的响应电流耦合到电压到电流转换器来向电压 - 电流转换器提供第一电位。