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1. 发明授权

US08446994B2 Gain control in a communication channel 有权
标题翻译：在通信通道中增益控制
公开(公告)号：US08446994B2
公开(公告)日：2013-05-21
申请号：US12634233
申请日：2009-12-09
申请人： Gregory S. Rawlins , Kevin Brown , Michael W. Rawlins , David F. Sorrells
发明人： Gregory S. Rawlins , Kevin Brown , Michael W. Rawlins , David F. Sorrells
IPC分类号： H04L27/08
CPC分类号： H03G3/20 , H04B1/30
摘要： Methods and apparatuses for reducing DC offsets in a communication system are described. In a first aspect, a feedback loop circuit reduces DC offset in a wireless local area network (WLAN) receiver channel. The frequency response of the feedback loop circuit can be variable. In a second aspect, a circuit provides gain control in a WLAN receiver channel. The stored DC offset is subtracted from the receiver channel. First and second automatic gain control (AGC) amplifiers are coupled in respective portions of the receiver channel. In a third aspect, a feedback loop circuit reduces DC offset in a WLAN receiver channel. The feedback loop circuit includes a storage element that samples and stores receiver channel DC offset. The loop is opened, and the DC offset stored in the storage element is subtracted from the receiver channel. Circuits for monitoring DC offset, and for providing control signals for controlling the frequency response of the DC offset reducing circuits are also provided.
摘要翻译：描述用于减少通信系统中的DC偏移的方法和装置。在第一方面，反馈回路电路减少无线局域网（WLAN）接收机信道中的DC偏移。反馈回路电路的频率响应是可变的。在第二方面，电路在WLAN接收机信道中提供增益控制。从接收机通道中减去存储的直流偏移。第一和第二自动增益控制（AGC）放大器耦合在接收机通道的相应部分中。在第三方面，反馈回路电路减少WLAN接收机信道中的DC偏移。反馈回路电路包括采样和存储接收机通道DC偏移的存储元件。打开该循环，并从接收器通道中减去存储在存储元件中的DC偏移。还提供了用于监控DC偏移的电路，以及用于提供用于控制DC偏移减小电路的频率响应的控制信号。

2. 发明授权

US07653158B2 Gain control in a communication channel 有权
标题翻译：在通信通道中增益控制
公开(公告)号：US07653158B2
公开(公告)日：2010-01-26
申请号：US11356419
申请日：2006-02-17
申请人： Gregory S. Rawlins , Kevin Brown , Michael W. Rawlins , David F. Sorrells
发明人： Gregory S. Rawlins , Kevin Brown , Michael W. Rawlins , David F. Sorrells
IPC分类号： H04L27/08
CPC分类号： H03G3/20 , H04B1/30
摘要： Methods and apparatuses for reducing DC offsets in a communication system are described. In a first aspect, a feedback loop circuit reduces DC offset in a wireless local area network (WLAN) receiver channel. The frequency response of the feedback loop circuit can be variable. In a second aspect, a circuit provides gain control in a WLAN receiver channel. The stored DC offset is subtracted from the receiver channel. First and second automatic gain control (AGC) amplifiers are coupled in respective portions of the receiver channel. In a third aspect, a feedback loop circuit reduces DC offset in a WLAN receiver channel. The feedback loop circuit includes a storage element that samples and stores receiver channel DC offset. The loop is opened, and the DC offset stored in the storage element is subtracted from the receiver channel. Circuits for monitoring DC offset, and for providing control signals for controlling the frequency response of the DC offset reducing circuits are also provided.
摘要翻译：描述用于减少通信系统中的DC偏移的方法和装置。在第一方面，反馈回路电路减少无线局域网（WLAN）接收机信道中的DC偏移。反馈回路电路的频率响应是可变的。在第二方面，电路在WLAN接收机信道中提供增益控制。从接收机通道中减去存储的直流偏移。第一和第二自动增益控制（AGC）放大器耦合在接收机通道的相应部分中。在第三方面，反馈回路电路减少WLAN接收机信道中的DC偏移。反馈回路电路包括采样和存储接收机通道DC偏移的存储元件。打开该循环，并从接收器通道中减去存储在存储元件中的DC偏移。还提供了用于监控DC偏移的电路，以及用于提供用于控制DC偏移减小电路的频率响应的控制信号。

3. 发明授权

US06975848B2 Method and apparatus for DC offset removal in a radio frequency communication channel 失效
标题翻译：射频通信信道中DC偏移消除的方法和装置
公开(公告)号：US06975848B2
公开(公告)日：2005-12-13
申请号：US10290323
申请日：2002-11-08
申请人： Gregory S. Rawlins , Kevin Brown , Michael W. Rawlins , David F. Sorrells
发明人： Gregory S. Rawlins , Kevin Brown , Michael W. Rawlins , David F. Sorrells
IPC分类号： H04B1/30 , H04B1/10 , H03F3/26 , H04B1/06
CPC分类号： H04B1/30
摘要： A filter module for reducing a DC offset voltage in a radio frequency communication channel is described. A first capacitor is coupled between a first differential input node and a first differential output node. A second capacitor is coupled between a second differential input node and a second differential output node. An active variable resistor is coupled between the first differential output node and the second differential output node. The active variable resistor receives a control signal. The control signal adjusts the value of the active variable resistor, which adjusts the frequency response of the filter module. The rate at which the filter module reduces DC offset voltages is thereby adjusted. The filter module is also adaptable to single-ended applications.
摘要翻译：描述了用于降低射频通信信道中的DC偏移电压的滤波器模块。第一电容器耦合在第一差分输入节点和第一差分输出节点之间。第二电容器耦合在第二差分输入节点和第二差分输出节点之间。有源可变电阻器耦合在第一差分输出节点和第二差分输出节点之间。有源可变电阻接收控制信号。控制信号调节有源可变电阻的值，调整滤波器模块的频率响应。由此调整滤波器模块降低DC偏移电压的速率。滤波模块也适用于单端应用。

4. 发明授权

US07072427B2 Method and apparatus for reducing DC offsets in a communication system 有权
标题翻译：用于减少通信系统中的直流偏移的方法和装置
公开(公告)号：US07072427B2
公开(公告)日：2006-07-04
申请号：US10289377
申请日：2002-11-07
申请人： Gregory S. Rawlins , Kevin Brown , Michael W. Rawlins , David F. Sorrells
发明人： Gregory S. Rawlins , Kevin Brown , Michael W. Rawlins , David F. Sorrells
IPC分类号： H04B1/10
CPC分类号： H03G3/20 , H04B1/30
摘要： Methods and apparatuses for reducing DC offsets in a communication system are described. In a first aspect, a feedback loop circuit reduces DC offset in a wireless local area network (WLAN) receiver channel. The frequency response of the feedback loop circuit can be variable. In a second aspect, a circuit provides gain control in a WLAN receiver channel. The stored DC offset is subtracted from the receiver channel. First and second automatic gain control (AGC) amplifiers are coupled in respective portions of the receiver channel. In a third aspect, a feedback loop circuit reduces DC offset in a WLAN receiver channel. The feedback loop circuit includes a storage element that samples and stores receiver channel DC offset. The loop is opened, and the DC offset stored in the storage element is subtracted from the receiver channel. Circuits for monitoring DC offset, and for providing control signals for controlling the frequency response of the DC offset reducing circuits are also provided.
摘要翻译：描述用于减少通信系统中的DC偏移的方法和装置。在第一方面，反馈回路电路减少无线局域网（WLAN）接收机信道中的DC偏移。反馈回路电路的频率响应是可变的。在第二方面，电路在WLAN接收机信道中提供增益控制。从接收机通道中减去存储的直流偏移。第一和第二自动增益控制（AGC）放大器耦合在接收机通道的相应部分中。在第三方面，反馈回路电路减少WLAN接收机信道中的DC偏移。反馈回路电路包括采样和存储接收机通道DC偏移的存储元件。打开该循环，并从接收器通道中减去存储在存储元件中的DC偏移。还提供了用于监控DC偏移的电路，以及用于提供用于控制DC偏移减小电路的频率响应的控制信号。

5. 发明授权

US08781418B2 Power amplification based on phase angle controlled reference signal and amplitude control signal 有权
标题翻译：功率放大基于相位角控制参考信号和幅度控制信号
公开(公告)号：US08781418B2
公开(公告)日：2014-07-15
申请号：US13425947
申请日：2012-03-21
申请人： David F. Sorrells , Gregory S. Rawlins , Michael W. Rawlins
发明人： David F. Sorrells , Gregory S. Rawlins , Michael W. Rawlins
IPC分类号： H04B1/04 , H03G3/30
CPC分类号： H03F1/0233 , H03C5/00 , H03F1/02 , H03F1/0205 , H03F1/0294 , H03F1/32 , H03F1/3205 , H03F1/3223 , H03F3/193 , H03F3/211 , H03F3/24 , H03F3/245 , H03F3/45071 , H03F2200/336 , H03F2200/387 , H03F2200/451 , H03F2201/3215 , H03G3/3042 , H04B1/04 , H04B1/0475 , H04B1/0483 , H04B2001/045 , H04B2001/0491 , H04L27/20 , H04L27/36 , H04L27/362
摘要： Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.
摘要翻译：本文公开了用于矢量组合功率放大的方法和系统。在一个实施例中，多个信号被单独放大，然后相加以形成期望的时变复包络信号。控制一个或多个信号的相位和/或频率特性以提供期望的时变复包络信号的期望的相位，频率和/或幅度特性。在另一个实施例中，时变复包络信号被分解为多个恒定包络分量信号。构成信号被均等地或基本相等地放大，然后相加以构建原始时变包络信号的放大版本。实施例还执行上变频。

6. 发明授权

US08639196B2 Control modules 有权
标题翻译：控制模块
公开(公告)号：US08639196B2
公开(公告)日：2014-01-28
申请号：US12687811
申请日：2010-01-14
申请人： David F. Sorrells , Gregory S. Rawlins , Michael W. Rawlins
发明人： David F. Sorrells , Gregory S. Rawlins , Michael W. Rawlins
IPC分类号： H04B1/66 , H04L27/06
CPC分类号： H03F1/0233 , H03C5/00 , H03F1/02 , H03F1/0205 , H03F1/0294 , H03F1/32 , H03F1/3205 , H03F1/3223 , H03F3/193 , H03F3/211 , H03F3/24 , H03F3/245 , H03F3/45071 , H03F2200/336 , H03F2200/387 , H03F2200/451 , H03F2201/3215 , H03G3/3042 , H04B1/04 , H04B1/0475 , H04B1/0483 , H04B2001/045 , H04B2001/0491 , H04L27/20 , H04L27/36 , H04L27/362
摘要： A circuit is provided comprising detector circuitry, calculating circuitry, and determining circuitry. The detector circuitry is figured to generate an I data signal magnitude value of a sampled I data signal and a Q data signal magnitude value of a sampled Q data signal. The calculating circuitry is configured to calculate a phase shift angle φI between first and second equal and constant or substantially equal and constant envelope constituents of the sampled I data signal and to calculate a phase shift angle φQ between first and second substantially equal and substantially constant envelope constituents of the sampled Q data signal. The determining circuitry is configured to determine in-phase and quadrature amplitude information of the substantially equal and substantially constant envelope constituents of the sampled I signal and to determine in-phase and quadrature amplitude information of the first and second substantially equal and substantially constant envelope constituents of the sampled Q signal.
摘要翻译：提供了包括检测器电路，计算电路和确定电路的电路。检测器电路被计算为产生采样的I数据信号的I数据信号幅度值和采样的Q数据信号的Q数据信号幅度值。计算电路被配置为计算采样的I数据信号的第一和第二等量和恒定或基本上相等且恒定的包络成分之间的相移角度，并且计算第一和第二基本相等且基本上恒定的包络之间的相移角phi 采样Q数据信号的组成。确定电路被配置为确定采样的I信号的基本相等且基本上恒定的包络成分的同相和正交幅度信息，并且确定第一和第二基本相等且基本上恒定的包络成分的同相和正交幅度信息的采样Q信号。

7. 发明授权

US08571135B2 Method, system and apparatus for balanced frequency up-conversion of a baseband signal 有权
标题翻译：用于基带信号平衡上变频的方法，系统和装置
公开(公告)号：US08571135B2
公开(公告)日：2013-10-29
申请号：US13323550
申请日：2011-12-12
申请人： David F. Sorrells , Michael J. Bultman , Robert W. Cook , Richard C Looke , Charley D. Moses, Jr. , Gregory S. Rawlins , Michael W. Rawlins
发明人： David F. Sorrells , Michael J. Bultman , Robert W. Cook , Richard C Looke , Charley D. Moses, Jr. , Gregory S. Rawlins , Michael W. Rawlins
IPC分类号： H04L27/04 , H04L27/12 , H04L27/20
CPC分类号： H04B1/0475 , H03C3/40 , H03D3/006 , H03D7/00 , H04L25/03
摘要： A balanced transmitter up-converts a baseband signal directly from baseband-to-RF. The up-conversion process is sufficiently linear that no IF processing is required, even in communications applications that have stringent requirements on spectral growth. In operation, the balanced modulator sub-harmonically samples the baseband signal in a balanced and differential manner, resulting in harmonically rich signal. The harmonically rich signal contains multiple harmonic images that repeat at multiples of the sampling frequency, where each harmonic contains the necessary information to reconstruct the baseband signal. The differential sampling is performed according to a first and second control signals that are phase shifted with respect to each other. In embodiments of the invention, the control signals have pulse widths (or apertures) that operate to improve energy transfer to a desired harmonic in the harmonically rich signal. A bandpass filter can then be utilized to select the desired harmonic of interest from the harmonically rich signal. The sampling modules that perform the sampling can be configured in either a series or a shunt configuration. In embodiments of the invention, DC offset voltages are minimized between the sampling modules to minimize or prevent carrier insertion into the harmonic images.
摘要翻译：平衡发射机直接从基带到RF RF转换基带信号。上转换过程是足够的线性，即使在对频谱增长有严格要求的通信应用中也不需要IF处理。在运行中，平衡调制器以平衡和差分的方式对基带信号进行子谐波采样，从而产生谐波丰富的信号。谐波丰富的信号包含以抽样频率的倍数重复的多个谐波图像，其中每个谐波包含必要的信息以重构基带信号。根据相对于彼此相移的第一和第二控制信号执行差分采样。在本发明的实施例中，控制信号具有脉冲宽度（或孔径），其操作以改善在谐波丰富信号中的期望谐波的能量传递。然后可以利用带通滤波器从谐波丰富的信号中选择所需要的谐波。执行采样的采样模块可以以串联或分流配置进行配置。在本发明的实施例中，采样模块之间的DC偏移电压最小化，以最小化或防止载波插入到谐波图像中。

8. 发明授权

US08447248B2 RF power transmission, modulation, and amplification, including power control of multiple input single output (MISO) amplifiers 有权
标题翻译： RF功率传输，调制和放大，包括多输入单输出（MISO）放大器的功率控制
公开(公告)号：US08447248B2
公开(公告)日：2013-05-21
申请号：US11599393
申请日：2006-11-15
申请人： David F. Sorrells , Gregory S. Rawlins , Michael W. Rawlins
发明人： David F. Sorrells , Gregory S. Rawlins , Michael W. Rawlins
IPC分类号： H04B1/04
CPC分类号： H03F1/0233 , H03C5/00 , H03F1/02 , H03F1/0205 , H03F1/0294 , H03F1/32 , H03F1/3205 , H03F1/3223 , H03F3/193 , H03F3/211 , H03F3/24 , H03F3/245 , H03F3/45071 , H03F2200/336 , H03F2200/387 , H03F2200/451 , H03F2201/3215 , H03G3/3042 , H04B1/04 , H04B1/0475 , H04B1/0483 , H04B2001/045 , H04B2001/0491 , H04L27/20 , H04L27/36 , H04L27/362
摘要： Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.
摘要翻译：本文公开了用于矢量组合功率放大的方法和系统。在一个实施例中，多个信号被单独放大，然后相加以形成期望的时变复包络信号。控制一个或多个信号的相位和/或频率特性以提供期望的时变复包络信号的期望的相位，频率和/或幅度特性。在另一个实施例中，时变复包络信号被分解为多个恒定包络分量信号。构成信号被均等地或基本相等地放大，然后相加以构建原始时变包络信号的放大版本。实施例还执行上变频。

9. 发明申请

US20130027128A1 Systems and Methods of RF Power Transmission, Modulation, and Amplification 有权
标题翻译：射频功率传输，调制和放大的系统与方法
公开(公告)号：US20130027128A1
公开(公告)日：2013-01-31
申请号：US13532968
申请日：2012-06-26
申请人： David F. Sorrells , Gregory S. Rawlins , Michael W. Rawlins
发明人： David F. Sorrells , Gregory S. Rawlins , Michael W. Rawlins
IPC分类号： H03F3/68
CPC分类号： H03F1/0211 , H03F1/0272 , H03F1/0294 , H03F1/32 , H03F3/193 , H03F3/211 , H03F2200/336 , H03F2200/345 , H03F2200/451 , H03F2203/21106
摘要： Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.
摘要翻译：本文公开了用于矢量组合功率放大的方法和系统。在一个实施例中，多个信号被单独放大，然后相加以形成期望的时变复包络信号。控制一个或多个信号的相位和/或频率特性以提供期望的时变复包络信号的期望的相位，频率和/或幅度特性。在另一个实施例中，时变复包络信号被分解为多个恒定包络分量信号。构成信号被均等地或基本相等地放大，然后相加以构建原始时变包络信号的放大版本。实施例还执行上变频。

10. 发明授权

US08340618B2 Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships 有权
标题翻译：用于下变频电磁信号的方法和系统，并且对于相同和孔径关系进行变换
公开(公告)号：US08340618B2
公开(公告)日：2012-12-25
申请号：US12976839
申请日：2010-12-22
申请人： David F. Sorrells , Michael J. Bultman , Robert W. Cook , Richard C. Looke , Charley D. Moses , Gregory S. Rawlins , Michael W. Rawlins
发明人： David F. Sorrells , Michael J. Bultman , Robert W. Cook , Richard C. Looke , Charley D. Moses , Gregory S. Rawlins , Michael W. Rawlins
IPC分类号： G06F15/16
CPC分类号： H04L27/3881 , H03C1/62 , H03D7/00 , H03D7/1441 , H03D7/1475 , H04B1/0025 , H04B1/16 , H04B1/28 , H04B7/12 , H04L25/08 , H04L27/00 , H04L27/06 , H04L27/12 , H04L27/14 , H04L27/148 , H04L27/156 , H04L27/2672
摘要： Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for down-converting an electromagnetic (EM) signal are described herein. Briefly stated, in embodiments the invention operates by receiving an EM signal and recursively operating on approximate half cycles (½, 1½, 2½, etc.) of the carrier signal. The recursive operations can be performed at a sub-harmonic rate of the carrier signal. The invention accumulates the results of the recursive operations and uses the accumulated results to form a down-converted signal. In an embodiment, the EM signal is down-converted to an intermediate frequency (IF) signal. In another embodiment, the EM signal is down-converted to a baseband information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated (PM) signal or an amplitude modulated (AM) signal.
摘要翻译：本文描述了用于电磁（EM）信号的下变频的方法，系统和装置，以及其组合和子组合。简言之，在实施例中，本发明通过接收EM信号并且在载波信号的近似半周期（½，1½，2½等）上递归地操作）来操作。可以以载波信号的次谐波速率执行递归运算。本发明积累了递归运算的结果，并使用累加结果形成降频转换信号。在一个实施例中，EM信号被下变频到中频（IF）信号。在另一个实施例中，EM信号被下变频为基带信息信号。在另一个实施例中，EM信号是频率调制（FM）信号，其被下变频成非FM信号，例如相位调制（PM）信号或幅度调制（AM）信号。

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