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公开(公告)号：US07915954B2
公开(公告)日：2011-03-29
申请号：US10987360
申请日：2004-11-12
IPC分类号： H03F3/68
CPC分类号： H03F1/3247 , H03F1/0222 , H03F1/3282 , H03F2201/3233 , H03G3/3047
摘要： Methods and apparatus for amplifier AM and PM predistortion and autocalibration. AM and PM amplifier distortion can be corrected using predistortion. The AM and PM distortion characteristics of the amplifier are determined using an autocalibration technique. The amplifier characteristics can be stored in distinct look up tables. Alternatively, the inverse of the amplifier characteristics can be stored in distinct look up tables. Signals that are to be amplified are characterized in polar format having a phase component with a normalized magnitude and a magnitude component. The phase component can be predistorted by applying the inverse of the PM distortion characteristics to the signal. Similarly, the magnitude component can be predistorted by applying the inverse of the AM distortion characteristics to the signal. The predistorted phase component can be amplified using the previously characterized amplifier. The predistorted magnitude component can be used to set the gain of the previously characterized amplifier.
摘要翻译： 放大器AM和PM预失真和自动校准的方法和装置。 AM和PM放大器失真可以使用预失真校正。 使用自动校准技术确定放大器的AM和PM失真特性。 放大器特性可以存储在不同的查找表中。 或者，放大器特性的倒数可以存储在不同的查找表中。 要被放大的信号的特征在于具有归一化幅度和幅度分量的相位分量的极化格式。 通过将PM失真特性的反相应用于信号，可以对相位分量进行预失真。 类似地，幅度分量可以通过将AM失真特性的反相应用于信号来预失真。 可以使用先前描述的放大器来放大预失真相位分量。 预失真幅度分量可用于设置先前表征的放大器的增益。
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公开(公告)号：US06960962B2
公开(公告)日：2005-11-01
申请号：US10020607
申请日：2001-12-10
申请人： Paul E. Peterzell , David Maldonado , Kevin Gard , Puay Hoe See , Jeremy Dunworth , Gurkanwal Sahota
发明人： Paul E. Peterzell , David Maldonado , Kevin Gard , Puay Hoe See , Jeremy Dunworth , Gurkanwal Sahota
摘要： A system and method for generating a local oscillator (LO) frequency in a zero intermediate frequency (IF) receiver or transmitter is presented. A signal is received from a voltage controlled oscillator (VCO). The signal has a VCO frequency. The VCO frequency is divided by a number N to produce a signal having a divided-down frequency. The signal having the VCO frequency is then mixed with the signal having the divided-down frequency to produce an output signal having an output frequency. Local oscillator leakage is reduced. Thus, the receiver or transmitter may operate in multiple wireless communication bands and modes and meet the associated specifications.
摘要翻译： 提出了一种用于在零中频（IF）接收机或发射机中产生本地振荡器（LO）频率的系统和方法。 从压控振荡器（VCO）接收信号。 该信号具有VCO频率。 将VCO频率除以数字N以产生具有分频的信号。 然后将具有VCO频率的信号与具有分频频率的信号混合，以产生具有输出频率的输出信号。 本地振荡器泄漏减少。 因此，接收机或发射机可以在多个无线通信频带和模式中操作并满足相关规范。
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公开(公告)号：US20130063223A1
公开(公告)日：2013-03-14
申请号：US13231824
申请日：2011-09-13
申请人： Puay Hoe See , Xiangdong Zhang
发明人： Puay Hoe See , Xiangdong Zhang
IPC分类号： H03H7/38
摘要： Reconfigurable impedance matching circuits with multiple configurations are disclosed. A reconfigurable impedance matching circuit may be implemented with a set of reactive elements (e.g., inductors and/or capacitors) and a set of switches. Different configurations may be obtained with different settings of the switches and may be associated with different impedance tuning curves. This may enable the reconfigurable impedance matching circuit to provide better impedance matching for a load circuit (e.g., an antenna). In an exemplary design, the reconfigurable impedance matching circuit includes at least one variable reactive element configured to tune the impedance of the reconfigurable impedance matching circuit in order to provide better impedance matching. In an exemplary design, the reconfigurable impedance matching circuit may include at least one reconfigurable reactive element, each of which can be connected as a series element or a shunt element.
摘要翻译： 公开了具有多种配置的可重构阻抗匹配电路。 可以用一组无功元件（例如，电感器和/或电容器）和一组开关来实现可重构阻抗匹配电路。 可以通过开关的不同设置获得不同的配置，并且可以与不同的阻抗调谐曲线相关联。 这可以使可重构阻抗匹配电路为负载电路（例如，天线）提供更好的阻抗匹配。 在示例性设计中，可重构阻抗匹配电路包括至少一个可变无功元件，其被配置为调整可重构阻抗匹配电路的阻抗，以便提供更好的阻抗匹配。 在示例性设计中，可重新配置的阻抗匹配电路可以包括至少一个可重新配置的反应元件，每个元件可以作为串联元件或并联元件连接。
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4.发明授权Systems and methods for controlling the voltage of signals used to control power amplifiers 有权用于控制用于控制功率放大器的信号电压的系统和方法公开(公告)号：US07974317B2
公开(公告)日：2011-07-05
申请号：US12133758
申请日：2008-06-05
申请人： David Maldonado , Puay Hoe See , Bo Sun , Guang Zhang , Brett C. Walker
发明人： David Maldonado , Puay Hoe See , Bo Sun , Guang Zhang , Brett C. Walker
IPC分类号： H04J3/04
CPC分类号： H04B1/0483 , H04B1/40 , H04B2001/0416
摘要： A method for controlling the voltage of signals used to control power amplifiers is described. A first multiplexer and a second multiplexer are set to an enabling signal. The first multiplexer is on a first integrated circuit and the second multiplexer is on a second integrated circuit. A command is written to the first multiplexer to set the first multiplexer to one of a plurality of control signals used to control a power amplifier. A command is written to the second multiplexer to select one of the plurality of control signals that maps to the first multiplexer. The second integrated circuit is connected to a power supply.
摘要翻译： 描述了用于控制用于控制功率放大器的信号的电压的方法。 第一多路复用器和第二多路复用器被设置为使能信号。 第一多路复用器在第一集成电路上，第二多路复用器在第二集成电路上。 一个命令被写入到第一多路复用器中，以将第一多路复用器设置成用于控制功率放大器的多个控制信号之一。 一个命令被写入第二多路复用器以选择映射到第一多路复用器的多个控制信号之一。 第二集成电路连接到电源。
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公开(公告)号：US20110037516A1
公开(公告)日：2011-02-17
申请号：US12641228
申请日：2009-12-17
IPC分类号： H03F3/68
摘要： Exemplary techniques for performing impedance matching are described. In an exemplary embodiment, the apparatus may include an amplifier (e.g., a power amplifier) coupled to first and second matching circuits. The first matching circuit may include multiple stages coupled to a first node and may provide input impedance matching for the amplifier. The second matching circuit may include multiple stages coupled to a second node and may provide output impedance matching for the amplifier. At least one switch may be coupled between the first and second nodes and may bypass or select the amplifier. The first and second nodes may have a common impedance. The apparatus may further include a second amplifier coupled in parallel with the amplifier and further to the matching circuits. The second matching circuit may include a first input stage coupled to the amplifier, a second input stage coupled to the second amplifier, and a second stage coupled to the two input stages via switches.
摘要翻译： 描述了用于执行阻抗匹配的示例性技术。 在示例性实施例中，该装置可以包括耦合到第一和第二匹配电路的放大器（例如，功率放大器）。 第一匹配电路可以包括耦合到第一节点的多个级并且可以为放大器提供输入阻抗匹配。 第二匹配电路可以包括耦合到第二节点的多个级并且可以为放大器提供输出阻抗匹配。 至少一个开关可以耦合在第一和第二节点之间，并且可以旁路或选择放大器。 第一和第二节点可以具有公共阻抗。 该装置还可以包括与放大器并联并且进一步耦合到匹配电路的第二放大器。 第二匹配电路可以包括耦合到放大器的第一输入级，耦合到第二放大器的第二输入级，以及经由开关耦合到两个输入级的第二级。
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6.发明申请SYSTEMS AND METHODS FOR CONTROLLING THE VOLTAGE OF SIGNALS USED TO CONTROL POWER AMPLIFIERS 有权用于控制用于控制功率放大器的信号电压的系统和方法公开(公告)号：US20090161588A1
公开(公告)日：2009-06-25
申请号：US12133758
申请日：2008-06-05
申请人： David Maldonado , Puay Hoe See , Bo Sun , Guang Zhang , Brett C. Walker
发明人： David Maldonado , Puay Hoe See , Bo Sun , Guang Zhang , Brett C. Walker
CPC分类号： H04B1/0483 , H04B1/40 , H04B2001/0416
摘要： A method for controlling the voltage of signals used to control power amplifiers is described. A first multiplexer and a second multiplexer are set to an enabling signal. The first multiplexer is on a first integrated circuit and the second multiplexer is on a second integrated circuit. A command is written to the first multiplexer to set the first multiplexer to one of a plurality of control signals used to control a power amplifier. A command is written to the second multiplexer to select one of the plurality of control signals that maps to the first multiplexer. The second integrated circuit is connected to a power supply.
摘要翻译： 描述了用于控制用于控制功率放大器的信号的电压的方法。 第一多路复用器和第二多路复用器被设置为使能信号。 第一多路复用器在第一集成电路上，第二多路复用器在第二集成电路上。 一个命令被写入到第一多路复用器中，以将第一多路复用器设置成用于控制功率放大器的多个控制信号之一。 一个命令被写入第二多路复用器以选择映射到第一多路复用器的多个控制信号之一。 第二集成电路连接到电源。
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公开(公告)号：US09054756B2
公开(公告)日：2015-06-09
申请号：US13236423
申请日：2011-09-19
申请人： Puay Hoe See , Xiangdong Zhang
发明人： Puay Hoe See , Xiangdong Zhang
CPC分类号： H04B1/0458 , H03H7/40 , H04B1/18
摘要： Techniques for adaptively tuning an impedance matching circuit are disclosed. In an aspect, the impedance matching circuit is pre-characterized. The performance of the impedance matching circuit is determined for multiple settings of the impedance matching circuit, stored in memory, and used to tune the impedance matching circuit. In another aspect, the impedance matching circuit is tuned based on measurements for one or more parameters such as delivered power, return loss, power amplifier current, antenna/load impedance, etc. In an exemplary design, an apparatus includes a memory and a control unit. The memory stores information for multiple settings of an impedance matching circuit. The control unit selects one of the multiple settings of the impedance matching circuit based on the information for the multiple settings and measurements for the impedance matching circuit. The impedance matching circuit performs impedance matching for a load circuit (e.g., an antenna) based on the selected setting.
摘要翻译： 公开了用于自适应调谐阻抗匹配电路的技术。 在一方面，阻抗匹配电路是预先表征的。 阻抗匹配电路的性能决定于阻抗匹配电路的多个设置，存储在存储器中，并用于调谐阻抗匹配电路。 在另一方面，基于对一个或多个参数（例如传送功率，回波损耗，功率放大器电流，天线/负载阻抗等）的测量来调整阻抗匹配电路。在示例性设计中，设备包括存储器和控制 单元。 存储器存储用于阻抗匹配电路的多个设置的信息。 控制单元基于阻抗匹配电路的多重设置和测量的信息来选择阻抗匹配电路的多个设置之一。 阻抗匹配电路基于所选择的设置对负载电路（例如，天线）执行阻抗匹配。
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公开(公告)号：US08971830B2
公开(公告)日：2015-03-03
申请号：US12575414
申请日：2009-10-07
申请人： Aristotle Hadjichristos , Puay Hoe See , Babak Nejati , Guy Klemens , Norman L Frederick, Jr. , Gurkanwal S Sahota , Marco Cassia , Nathan M Pletcher , Yu Zhao , Thomas A Myers
发明人： Aristotle Hadjichristos , Puay Hoe See , Babak Nejati , Guy Klemens , Norman L Frederick, Jr. , Gurkanwal S Sahota , Marco Cassia , Nathan M Pletcher , Yu Zhao , Thomas A Myers
CPC分类号： H04B1/0458 , H03F1/0277 , H03F3/24 , H03F3/72 , H03F2203/7236 , H04B1/0483
摘要： A multi-mode multi-band power amplifier (PA) module is described. In an exemplary design, the PA module includes multiple power amplifiers, multiple matching circuits, and a set of switches. Each power amplifier provides power amplification for its input signal when selected. Each matching circuit provides impedance matching and filtering for its power amplifier and provides a respective output signal. The switches configure the power amplifiers to support multiple modes, with each mode being for a particular radio technology. Each power amplifier supports at least two modes. The PA module may further include a driver amplifier and an additional matching circuit. The driver amplifier amplifies an input signal and provides an amplified signal to the power amplifiers. The additional matching circuit combines the outputs of other matching circuits and provides an output signal with higher output power. The driver amplifier and the power amplifiers can support multiple output power levels.
摘要翻译： 描述了多模式多频带功率放大器（PA）模块。 在示例性设计中，PA模块包括多个功率放大器，多个匹配电路和一组开关。 每个功率放大器在选择时为其输入信号提供功率放大。 每个匹配电路为其功率放大器提供阻抗匹配和滤波，并提供相应的输出信号。 这些开关配置功率放大器以支持多种模式，每种模式都适用于特定的无线电技术。 每个功率放大器至少支持两种模式。 PA模块还可以包括驱动器放大器和附加匹配电路。 驱动器放大器放大输入信号并向功率放大器提供放大的信号。 附加匹配电路组合其他匹配电路的输出，并提供具有较高输出功率的输出信号。 驱动器放大器和功率放大器可以支持多个输出功率电平。
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9.发明申请DETERMINING A DELIVERED POWER ESTIMATE AND A LOAD IMPEDANCE ESTIMATE USING A DIRECTIONAL COUPLER 审中-公开使用方向耦合器确定交付的功率估计和负载阻抗估计公开(公告)号：US20130324057A1
公开(公告)日：2013-12-05
申请号：US13619061
申请日：2012-09-14
申请人： Xiangdong Zhang , Xinwei Wang , Puay Hoe See
发明人： Xiangdong Zhang , Xinwei Wang , Puay Hoe See
IPC分类号： H04B1/40
CPC分类号： H04B1/40 , H03H7/40 , H04B1/0458
摘要： A wireless device configured for optimizing a delivered power is described. The wireless device includes a filter duplexer or switch coupled to a transmitter and a receiver. The wireless device also includes a power/impedance detector coupled to the filter duplexer or switch. The power/impedance detector includes a directional coupler. An antenna is coupled to the power/impedance detector. Other aspects, embodiments and features are also claimed and described.
摘要翻译： 描述了配置用于优化传送功率的无线设备。 无线设备包括耦合到发射机和接收机的滤波器双工器或开关。 无线设备还包括耦合到滤波器双工器或开关的电源/阻抗检测器。 功率/阻抗检测器包括定向耦合器。 天线耦合到电源/阻抗检测器。 还要求和描述其它方面，实施例和特征。
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10.发明授权公开(公告)号：US08963611B2
公开(公告)日：2015-02-24
申请号：US12580988
申请日：2009-10-16
申请人： Puay Hoe See , Gary J. Ballantyne , Gurkanwal Singh Sahota , Aristotele Hadjichristos , Alberto Cicalini
发明人： Puay Hoe See , Gary J. Ballantyne , Gurkanwal Singh Sahota , Aristotele Hadjichristos , Alberto Cicalini
IPC分类号： G06G7/16
CPC分类号： H04B1/0458 , H03H7/40
摘要： Exemplary embodiments disclosed are directed to power and impedance measurement circuits that may be used to measure power and/or impedance are described. A measurement circuit may include a sensor and a computation unit. The sensor may sense (i) a first voltage signal across a series circuit coupled to a load to obtain a first sensed signal and (ii) a second voltage signal at a designated end of the series circuit to obtain a second sensed signal. The sensor may mix (i) a first version of the first sensed signal with a first version of the second sensed signal to obtain a first sensor output and (ii) a second version of the first sensed signal with a second version of the second sensed signal to obtain a second sensor output. The computation unit may determine the impedance and/or delivered power at the designated end of the series circuit based on the sensor outputs.
摘要翻译： 所公开的示例性实施例涉及可用于测量功率和/或阻抗的功率和阻抗测量电路。 测量电路可以包括传感器和计算单元。 传感器可以感测（i）跨耦合到负载的串联电路的第一电压信号以获得第一感测信号，以及（ii）串联电路的指定端的第二电压信号以获得第二感测信号。 传感器可以将（i）第一感测信号的第一版本与第二感测信号的第一版本混合以获得第一传感器输出，以及（ii）第一感测信号的第二版本，具有第二感测的第二版本 信号以获得第二传感器输出。 计算单元可以基于传感器输出来确定串联电路的指定端处的阻抗和/或传递功率。
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