公开(公告)号：US06819199B2

公开(公告)日：2004-11-16

申请号：US09892755

申请日：2001-06-28

申请人： Lawrence M. Burns ,  Carl W. Pobanz

发明人： Lawrence M. Burns ,  Carl W. Pobanz

IPC分类号： H01P510

CPC分类号： H05K1/0239 ,  H01P5/10 ,  H05K2201/10015

摘要： The invention is a balun transformer that converts a single-ended (or unbalanced) signal to a differential (or balanced) signal. The balun is a printed metal pattern on a circuit board in conjunction with several low cost chip capacitors and a low cost chip inductor. The balun transformer is a modified Marchand balun that is implemented using printed transmission lines. The balun has a plurality of coupled transmission lines to improve tolerances to variations in PC board fabrication. To make the balun compact, it is electrically lengthened through the use of capacitive loading, which reduces the required physical size. Additionally, the capacitors increase the bandwidth due to the resonant interaction between the short inductive balun and the capacitors that are placed in series with the input and the output.

摘要翻译： 本发明是将单端（或不平衡）信号转换为差分（或平衡）信号的平衡 - 不平衡变压器。 平衡 - 不平衡转换器是电路板上的印刷金属图案，结合几个低成本芯片电容器和低成本芯片电感器。 平衡 - 不平衡变压器是采用印刷传输线实现的经修改的Marchand平衡 - 不平衡变压器。 平衡 - 不平衡转换器具有多个耦合传输线，以改善对PC板制造变化的公差。 为了使平衡 - 不平衡变压器紧凑，通过使用电容负载来电延长，这减少了所需的物理尺寸。 此外，由于短路感应平衡 - 不平衡变压器和与输入和输出串联放置的电容器之间的谐振相互作用，电容器增加了带宽。

公开(公告)号：US06751272B1

公开(公告)日：2004-06-15

申请号：US09022069

申请日：1998-02-11

申请人： Lawrence M. Burns ,  Ravi Ramachandran ,  David Fisher ,  Chong Woo ,  Scott Mitchell

发明人： Lawrence M. Burns ,  Ravi Ramachandran ,  David Fisher ,  Chong Woo ,  Scott Mitchell

IPC分类号： H03D100

CPC分类号： H03D3/008 ,  H04L25/063 ,  H04L27/142

摘要： In a system that demodulates a frequency modulated signal using a quadrature detector circuit, an apparatus that tunes the output signal to compensate for any offset in the signal includes an offset adjustment circuit and a control circuit. The offset adjustment circuit is operably coupled to the control circuit which may consist of a DAC and a digital logic such as a computer CPU. The control circuit determines a correction signal in response to a sequence of sampled of the system output, and supplies the correction signal to the offset adjustment circuit. The offset adjustment circuit provides an offset correction signal in response to the correction signal, and combines the offset correction signal with the output of the quadrature detector to provide an offset adjusted signal at an output node.

摘要翻译： 在使用正交检波器电路解调频率调制信号的系统中，调谐输出信号以补偿信号中的任何偏移的装置包括偏移调整电路和控制电路。 偏移调整电路可操作地耦合到控制电路，该控制电路可以由DAC和诸如计算机CPU的数字逻辑组成。 控制电路响应于系统输出的采样序列来确定校正信号，并将校正信号提供给偏移调整电路。 偏移调整电路响应于校正信号提供偏移校正信号，并将偏移校正信号与正交检波器的输出组合，以在输出节点处提供偏移调整信号。

公开(公告)号：US06747510B2

公开(公告)日：2004-06-08

申请号：US10163143

申请日：2002-06-07

申请人： Stephen A. Jantzi ,  Anilkumar V. Tammineedi ,  Jungwoo Song ,  Lawrence M. Burns ,  Donald G. McMullin ,  Agnes N. Woo

发明人： Stephen A. Jantzi ,  Anilkumar V. Tammineedi ,  Jungwoo Song ,  Lawrence M. Burns ,  Donald G. McMullin ,  Agnes N. Woo

IPC分类号： H03F152

CPC分类号： H03G3/001 ,  H03G1/0088

摘要： An upstream amplifier is integrated on a substrate with a digital-to-analog converter (DAC) to form an integrated circuit. In an embodiment, a low-pass filter is also integrated on the substrate. The output signal level of the upstream amplifier is controllable. In embodiments, fine adjustments are made to the output signal level of the upstream amplifier by varying a bias current of the DAC. A software control bit is used to switch between a power-on mode of operation and a power-down mode of operation. The upstream amplifier transmits in a burst mode. The power consumption of the upstream amplifier scales with the amplifier's output signal level. A high degree of matching is attained between the positive and negative paths of the upstream amplifier. This provides high immunity from common-mode disturbances such as substrate noise, clock spurs, and glitches caused by a gain change.

摘要翻译： 上游放大器集成在具有数模转换器（DAC）的基板上，以形成集成电路。 在一个实施例中，低通滤波器也集成在基板上。 上游放大器的输出信号电平是可控的。 在实施例中，通过改变DAC的偏置电流对上游放大器的输出信号电平进行微调。 软件控制位用于在上电操作模式和掉电操作模式之间切换。 上游放大器以突发模式发送。 上游放大器的功耗随放大器的输出信号电平而变化。 在上游放大器的正和负路径之间达到高度的匹配。 这提供了诸如衬底噪声，时钟刺激和由增益变化引起的毛刺等共模干扰的高抗扰性。

公开(公告)号：US06696893B2

公开(公告)日：2004-02-24

申请号：US10319599

申请日：2002-12-16

申请人： Lawrence M. Burns ,  Leonard Dauphinee

发明人： Lawrence M. Burns ,  Leonard Dauphinee

IPC分类号： H03G320

CPC分类号： H03G3/3068 ,  G05F3/242 ,  H03F3/211 ,  H03F3/72 ,  H03F2203/21191 ,  H03F2203/7227 ,  H03G3/001 ,  H03G3/3042

摘要： An extended range variable gain amplifier is described. The variable gain capability is achieved by replacing differential pair amplifiers having an input signal with less attenuation with one having an input signal that is more attenuated. This replacement continues until only ten differential pair amplifiers are remaining. At this point, if less gain is desired, differential pair amplifiers are turned off, but are not replaced. A minimum number of amplifiers will remain on.

摘要翻译： 描述了扩展范围可变增益放大器。 可变增益能力通过用具有更多衰减的输入信号替换具有较小衰减的输入信号的差分对放大器来实现。 该替换继续，直到仅剩下十个差分对放大器。 此时，如果需要较小的增益，则差分对放大器被关闭，但不被替换。 最少数量的放大器将保持开启状态。

公开(公告)号：US6140911A

公开(公告)日：2000-10-31

申请号：US416067

申请日：1999-10-12

申请人： David A. Fisher ,  Lawrence M. Burns ,  Stephen E. Muther

发明人： David A. Fisher ,  Lawrence M. Burns ,  Stephen E. Muther

IPC分类号： H04B3/54 ,  H04L12/10 ,  H04B1/00 ,  G08C19/00

CPC分类号： H04L12/10 ,  H04B3/542 ,  H04B2203/5437 ,  H04B2203/5441 ,  H04B2203/5445 ,  H04B2203/547 ,  H04B2203/5483 ,  H04B2203/5491

摘要： Electrical supply current, sufficient to power a wireless access point, is transmitted concurrently with a network data signal across a transmission line. A power and data coupler couples the network data signal and the power signal, received through a data input and a power input respectively, and transmits the coupled signal, to a distance of three meters or more, over the transmission line to a power and data decoupler. The power and data decoupler separates the power signal from the network data signal and supplies those signals to a power output port and a data output port, respectively, for use by a wireless access node. The power signal may be modulated at a low frequency relative to the frequency of the data signal, and the network data signal has a data transmission rate of one megabit/second or higher.

摘要翻译： 足以为无线接入点供电的供电电流通过传输线与网络数据信号同时传输。 电力和数据耦合器通过数据输入和电源输入耦合网络数据信号和功率信号，并将传输线上的耦合信号传输到三米或更远的距离，以将功率和数据 解耦器 功率和数据去耦器将功率信号与网络数据信号分离，并将这些信号分别提供给功率输出端口和数据输出端口，供无线接入节点使用。 功率信号可以相对于数据信号的频率以低频进行调制，并且网络数据信号具有1兆比特/秒以上的数据传输速率。

公开(公告)号：US6020562A

公开(公告)日：2000-02-01

申请号：US967489

申请日：1997-11-11

申请人： Lawrence M. Burns ,  Nicholas Mitchell ,  Theresa Bradshaw ,  Chong Woo

发明人： Lawrence M. Burns ,  Nicholas Mitchell ,  Theresa Bradshaw ,  Chong Woo

IPC分类号： H05K1/02 ,  H05K1/11 ,  H05K3/34 ,  H01R9/09 ,  H01R23/68

CPC分类号： H05K1/0216 ,  H05K1/111 ,  H05K1/0231 ,  H05K1/0243 ,  H05K2201/0792 ,  H05K2201/093 ,  H05K2201/09381 ,  H05K2201/094 ,  H05K2201/0969 ,  H05K2201/1006 ,  H05K2201/10636 ,  H05K2201/10689 ,  H05K3/3421 ,  Y02P70/611

摘要： Component mounting pads for multi-layer printed circuit boards encompass a smaller area than conventional pads, reducing parasitic capacitance between the pads and a ground plane layer. A number of such pads are arranged to accommodate standard surface-mount component sizes and packages. Further capacitance reductions are achieved by implementing mesh areas or apertures in the board's ground plane opposite the reduced-capacitance pads.

摘要翻译： 用于多层印刷电路板的组件安装垫包括比传统焊盘更小的面积，减小焊盘和接地平面层之间的寄生电容。 许多这样的垫布置成适应标准的表面贴装部件尺寸和包装。 通过在电路板的接地平面中与减小电容的焊盘相对地实现网格区域或孔径来实现进一步的电容减小。

公开(公告)号：US5936537A

公开(公告)日：1999-08-10

申请号：US716763

申请日：1996-09-23

申请人： Lawrence M. Burns ,  Daniel Case ,  David A. Fisher

发明人： Lawrence M. Burns ,  Daniel Case ,  David A. Fisher

IPC分类号： G01R21/01 ,  G08B21/00

CPC分类号： G01R21/01

摘要： A micro-power, micro-size RF detector is suitable for implementation on an integrated circuit. The detector is used for detecting the presence of high frequency AC signals on a transmission line which has a transmission line impedance. An input for connection to the transmission line through a high impedance relative to the transmission line is provided. A current mode detector is coupled to the input. The current mode detector translates AC signals on the input to a bias signal having a DC component determined by power of the AC signal on the transmission line. A current mode amplifier is coupled to the current mode detector, and amplifies the bias signal to produce a detector current. A binary output driver is coupled to the current mode amplifier, which generates a binary signal having one binary level if the detector current exceeds a high signal threshold, and another binary level if the detector current falls below a low signal threshold.

摘要翻译： 微功率微型RF检测器适用于集成电路上的实现。 该检测器用于检测在具有传输线阻抗的传输线上存在高频AC信号。 提供了用于通过高阻抗相对于传输线连接到传输线的输入。 电流模式检测器耦合到输入端。 电流模式检测器将输入端的AC信号转换成具有由传输线上的AC信号的功率确定的DC分量的偏置信号。 电流模式放大器耦合到电流模式检测器，并且放大偏置信号以产生检测器电流。 二进制输出驱动器耦合到电流模式放大器，其如果检测器电流超过高信号阈值则产生具有一个二进制电平的二进制信号，以及如果检测器电流低于低信号阈值则产生另一二进制电平。

公开(公告)号：US5745479A

公开(公告)日：1998-04-28

申请号：US394378

申请日：1995-02-24

申请人： Lawrence M. Burns ,  Scott Mitchell ,  Bruce Kendall

发明人： Lawrence M. Burns ,  Scott Mitchell ,  Bruce Kendall

IPC分类号： H04L1/00 ,  H04B17/00

CPC分类号： H04L1/0083

摘要： An apparatus for detecting errors in a wireless communication channel comprises a receiver which receives a data stream from the wireless communication channel, a signal strength indication circuit coupled with the receiver which indicates signal strength for a received data stream, and processing resources coupled to the signal strength indication circuit which monitors the received data signal strength to detect anomalies in the strength of the received data stream, typical of erroneous data. Also, the system includes a signal phase monitoring circuit coupled with the receiver. This circuit indicates phase of the received data stream. Processing resources coupled with the signal phase monitoring circuit, monitor the received data stream phase to detect anomalies in phase of the received data stream typical of erroneous data. In addition, the data stream will include data packets having error detection codes imbedded within the data packets. Processing resources coupled with the receiver are responsive to the error detection codes to detect errors in the data packets. Thus, an error detection system based on monitoring the amplitude, and the phase of a received signal, combined with digital CRC detection techniques provides an efficient error detection system, capable of detecting interference early in transmission, allowing more rapid recovery in retries.

摘要翻译： 用于检测无线通信信道中的错误的装置包括接收来自无线通信信道的数据流的接收机，与接收机耦合的信号强度指示电路，其指示接收到的数据流的信号强度，以及处理与该信号相耦合的资源 强度指示电路，其监视接收的数据信号强度，以检测接收数据流的强度的异常，这是典型的错误数据。 而且，该系统包括与接收器耦合的信号相位监控电路。 该电路指示接收的数据流的相位。 处理与信号相位监控电路相结合的资源，监视接收到的数据流相位，以检测错误数据典型的接收数据流的相位异常。 此外，数据流将包括具有嵌入数据分组内的错误检测码的数据分组。 与接收器耦合的处理资源响应于错误检测码来检测数据分组中的错误。 因此，结合数字CRC检测技术的基于监测振幅和接收信号的相位的误差检测系统提供了能够在传输早期检测干扰的有效的误差检测系统，从而允许更快的恢复恢复。

公开(公告)号：US08843180B2

公开(公告)日：2014-09-23

申请号：US13910259

申请日：2013-06-05

申请人： James E. C. Brown ,  Daniel Dobkin ,  Pablo Moreno Galbis ,  Cory Severson ,  Lawrence M. Burns

发明人： James E. C. Brown ,  Daniel Dobkin ,  Pablo Moreno Galbis ,  Cory Severson ,  Lawrence M. Burns

IPC分类号： H04B1/38 ,  H02M3/156 ,  H02M3/158

CPC分类号： H02M3/156 ,  H02M3/158

摘要： Embodiments for at methods, apparatus and systems for operating a voltage regulator are disclosed. One apparatus includes a switching voltage regulator, wherein the switching voltage regulator includes a series switch element, a shunt switch element, a switching controller and a switched output filter. The switching controller is configured to generate a switching voltage through controlled closing and opening of the series switch element and the shunt switch element. The switched output filter filters the switching voltage and generates a regulated output voltage, wherein the switched output filter includes a plurality of capacitors that are selectively included within the switched output filter.

摘要翻译： 公开了用于操作电压调节器的方法，装置和系统的实施例。 一种装置包括开关电压调节器，其中开关电压调节器包括串联开关元件，分流开关元件，开关控制器和开关输出滤波器。 开关控制器被配置为通过可控制地闭合和断开串联开关元件和分流开关元件来产生开关电压。 开关输出滤波器对开关电压进行滤波并产生调节输出电压，其中开关输出滤波器包括选择性地包括在开关输出滤波器内的多个电容器。

公开(公告)号：US08395362B2

公开(公告)日：2013-03-12

申请号：US12915203

申请日：2010-10-29

申请人： James E. C. Brown ,  Lawrence M. Burns

发明人： James E. C. Brown ,  Lawrence M. Burns

IPC分类号： G05F1/613

CPC分类号： H02M1/38

摘要： Embodiments for at least one method and apparatus of controlling a dead time of a switching voltage regulator are disclosed. One method includes generating a regulated output voltage based upon a switching voltage. The method included generating the switching voltage through controlled closing and opening of a series switch element and a shunt switch element, wherein the dead time comprises time that both the series switch element and the shunt switch element are open. The duration of the dead time is adjusted based on a rate of change of the switching voltage.

摘要翻译： 公开了用于控制开关电压调节器的死区时间的至少一种方法和装置的实施例。 一种方法包括基于开关电压产生稳定的输出电压。 该方法包括通过可控闭合和断开串联开关元件和分流开关元件产生开关电压，其中死区时间包括串联开关元件和分流开关元件都打开的时间。 基于开关电压的变化率来调整死区时间的持续时间。