CN103296977A - Rf功率放大器校准数据的单调转换 - Google Patents

Rf功率放大器校准数据的单调转换 Download PDF

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CN103296977A
CN103296977A CN201210596632XA CN201210596632A CN103296977A CN 103296977 A CN103296977 A CN 103296977A CN 201210596632X A CN201210596632X A CN 201210596632XA CN 201210596632 A CN201210596632 A CN 201210596632A CN 103296977 A CN103296977 A CN 103296977A
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CN103296977B (zh
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N·赫拉
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Qorvo US Inc
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RF Micro Devices Inc
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/04—Modifications of control circuit to reduce distortion caused by control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
    • H03F1/0216—Continuous control
    • H03F1/0222—Continuous control by using a signal derived from the input signal
    • H03F1/0227—Continuous control by using a signal derived from the input signal using supply converters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3247—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits

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Abstract

本发明涉及RF功率放大器校准数据的单调转换。公开了一种电路，其包括数据存储器和处理电路。数据存储器用以存储基于查找表(LUT)的射频(RF)功率放大器(PA)校准数据。处理电路转换基于LUT的RF PA校准数据的至少一部分以提供基于单调响应曲线的数据。如此，使用基于单调响应曲线的数据基于RF输入信号的量值确定包络电源控制信号的量值。

Description

RF功率放大器校准数据的单调转换
相关申请
本申请要求2011年11月30日提交美国临时专利申请号61/565,138的权益，通过引用该公开的全文而将其并入于此。
技术领域
本公开实施例涉及用于校准射频(RF)功率放大器(PA)的校准***和方法，其可以用于RF通信***中。
背景技术
由于RF通信协议演化，数据速率趋向增加，其趋向使得传输的RF信号的带宽增加以支持较高数据速率。然而，与传输的RF信号的增加的带宽相比，传输的和接收的RF信号之间的双王频率间隔可以相对小，因此提出对RF通信***的严厉噪声约束。此外，RF发射机需要尽可能的高效以最大化电池寿命。因此，从基于开关转换器的包络电源为发射机功率放大器供电以最大化效率。如此，可能需要最小化由包络电源产生的噪声以满足RF通信***的噪声需求。
发明内容
本公开的实施例涉及电路，其包括数据存储器和处理电路。数据存储器被用于存储基于查找表(LUT)的射频(RF)功率放大器(PA)校准数据。处理电路转换基于LUT的RF PA校准数据的至少一部分以提供基于单调响应曲线的数据。如此，使用基于单调响应曲线的数据基于RF输入信号的量值确定包络电源控制信号的量值。
由于校准处理期间固有的***噪声，基于LUT的RF PA校准数据可能是固有地有噪声。结果，当使用基于LUT的RF PA校准数据以提供包络电源信号给RF***的RF PA时，噪声可被引入RF***，其可在RF***中引起性能问题，诸如使接收机灵敏度降级。通过转换基于LUT的RF PA校准数据的至少一部分以提供基于单调响应曲线的数据，可降低RF***中的噪声。
本领域技术人员在与附图关联地阅读以下详细描述后将理解本公开的范围并且意识到其附加方面。
附图说明
被并入并形成本说明书一部分的附图示出本公开的若干方面，并且连同描述用于解释本公开的原理。
图1示出根据电路的一实施例的使用在射频(RF)功率放大器(PA)校准环境中的电路。
图2示出关联于图1中示出的RF PA校准环境的校准数据响应曲线和单调响应曲线。
图3示出根据RF校准电路的一实施例的图1中示出的RF校准电路的细节。
图4示出根据RF校准电路的替代实施例的图1中示出的RF校准电路的细节。
图5示出根据电路的一实施例的使用在RF通信***中的电路。
图6示出根据电路的替代实施例的使用在RF通信***中的电路。
图7示出根据的电路的附加实施例的使用在RF通信***中的电路。
图8示出根据电路的另一实施例的使用在RF通信***中的电路。
图9示出根据电路的进一步实施例的使用在RF通信***中的电路。
图10示出根据电路的补充实施例的使用在RF通信***中的电路。
图11示出根据电路的一实施例的使用在RF通信***中的电路。
具体实施方式
以下阐明的实施例呈现了必要的信息以使本领域技术人员能够实现本公开并且示出实现本公开的最佳模式。在根据附图阅读以下描述时，本领域技术人员将理解本公开的概念并且将认识到这些概念的应用没有被在此特别提出。应当理解这些概念和应用落在本公开和所附权利要求书的范围内。
本公开的实施例涉及电路，其包括数据存储器和处理电路。数据存储器被用于存储基于查找表(LUT)的射频(RF)功率放大器(PA)校准数据。处理电路转换基于LUT的RF PA校准数据的至少一部分以提供基于单调响应曲线的数据。如此，使用基于单调响应曲线的数据基于RF输入信号的量值确定包络电源控制信号的量值。
由于校准处理期间固有的***噪声，基于LUT的RF PA校准数据可能是固有地有噪声。结果，当使用基于LUT的RF PA校准数据以提供包络电源信号给RF***的RFPA时，噪声可被引入RF***，其可在RF***中引起性能问题，诸如使接收机灵敏度降级。通过转换基于LUT的RF PA校准数据的至少一部分以提供基于单调响应曲线的数据，可降低RF***中的噪声。
图1示出根据电路10一实施例的使用在RF PA校准环境中的电路10。电路10包括RF校准电路12和校准RF PA14。在校准RF PA14的校准期间，RF校准电路12提供校准RF输入信号CRFI和校准包络电源信号CEPS给校准RFPA14。校准RF PA14使用校准包络电源信号CEPS以提供用于放大的功率来接收并放大校准RF输入信号CRFI以提供校准RF输出信号CRFO。RF校准电路12接收校准RF输出信号CRFO。
在校准RF PA14的校准期间，RF校准电路12改变校准RF输入信号CRFI的量值并改变校准包络电源信号CEPS的量值并测量校准RF输出信号CRFO的所得量值。校准RF输入信号CRFI的量值关联于输入功率级并且校准RF输出信号CRFO的量值关联于输出功率级。在这点上，RF校准电路12基于校准RF输入信号CRFI、校准包络电源信号CEPS和校准RF输出信号CRFO的量值创建RF PA校准数据16。
在校准RFPA14的校准的一实施例中，为了在校准RF功率范围上近似恒定的增益操作，RF PA校准数据16基于对校准RF PA14进行校准。该恒定增益操作被称为isogain。此外，在isogain条件期间，校准RF PA14可被进行压缩，使得校准包络电源信号CEPS的量值不足以以完全线性方式保持校准RF PA14操作。如此，在压缩期间，在线性操作期间，对校准RF输入信号CRFI的增量改变的校准RF输出信号CRFO的增量响应小于校准RF输出信号CRFO的增量响应。利用压缩操作校准RF PA14可增加校准RF PA14的效率，但可使校准RF PA14的线性降级。因此，通过利用isogain和压缩来操作校准RF PA14，可实现效率和线性之间的最佳的平衡。
图2示出根据校准图1中示出的校准RF PA14的一实施例的关联于图1中示出的RF PA校准环境的校准数据响应曲线18和单调响应曲线20。校准数据响应曲线18基于对RF PA校准数据16的绘制(图1)。特别地，校准数据响应曲线18使校准包络电源信号CEPS(图1)与校准RF输入信号CRFI(图1)相关。然而，由于校准处理期间固有的***噪声，校准数据响应曲线18可以是有噪声的，如所图所示。该噪声可以使RF校准电路12(图1)准确校准校准RFPA14(图1)的能力降级。然而，单调转换可被应用到RF PA校准数据16(图1)以滤除噪声的至少一些来提供单调响应曲线20。
单调响应曲线是不具有斜率反转(reversal)的响应曲线。通常，单调响应曲线具有第一特性或第二特性。具有第一特性的单调响应曲线在曲线上的任意点处具有为零或正但从不为负的斜率。具有第二特性的单调响应曲线在曲线上的任意点处具有为零或负但从不为正的斜率。图2中示出的单调响应曲线20具有第一特性，使得相对于校准RF输入信号CRFI单调响应曲线20代表校准包络电源信号CEPS，并且当校准RF输入信号CRFI的包络增加时，校准包络电源信号CEPS的量值从不减少。通过使用单调响应曲线20代替校准数据响应曲线18，可增强校准RF PA14(图1)的准确操作。
图3示出根据RF校准电路12的一个实施例的图1中示出的RF校准电路12的细节。图3中示出的RF校准电路12类似于图1中示出的RF校准电路12，除了图3中示出的RF校准电路12进一步包括数据存储器22和处理电路24。数据存储器22包括基于LUT的RF PA校准数据26和基于单调响应曲线的数据28。通过将RFF PA校准数据16(图1)表达为基于LUT的格式，基于LUT的RF PA校准数据26基于RF PA校准数据16(图1)。
基于单调响应曲线的数据28基于单调响应曲线20(图2)。在基于单调响应曲线的数据28的一实施例中，基于单调响应曲线的数据28是基于LUT的数据。处理电路24转换基于LUT的RF PA校准电路26的至少一部分以提供基于单调响应曲线的数据28。在基于单调响应曲线的数据28的一实施例中，基于单调响应曲线的数据28是基于LUT的RF PA校准数据26的预失真以降低校准包络电源信号CEPS上的噪声。
通过使用基于单调响应曲线的数据28提供校准包络电源信号CEPS，RF校准电路12可增强校准RF PA14的准确操作，使得校准包络电源信号CEPS的量值基于校准RF输入信号CRFI的量值。在校准RF PA14的校准的一实施例中，针对在校准RF功率范围上的近似恒定的增益操作，基于LUT的RF PA校准数据26基于对校准RF PA14的校准。
在基于单调响应曲线的数据28的一实施例中，基于单调响应曲线的数据28以基于LUT的RF PA校准数据26的至少一部分的高阶多项式内插为基础。在高阶多项式内插的第一实施例中，使用在内插中的数据点的数量至少两倍于高阶多项式内插的阶。在高阶多项式内插的第二实施例中，使用在内插中的数据点的数量至少五倍于高阶多项式内插的阶。在高阶多项式内插的第三实施例中，使用在内插中的数据点的数量至少十倍于高阶多项式内插的阶。在高阶多项式内插的第四实施例中，使用在内插中的数据点的数量至少五十倍于高阶多项式内插的阶。在高阶多项式内插的第五实施例中，使用在内插中的数据点的数量至少100倍于高阶多项式内插的阶。在高阶多项式内插的第六实施例中，使用在内插中的数据点的数量至少500倍于高阶多项式内插的阶。在高阶多项式内插的第七实施例中，使用在内插中的数据点的数量小于1000倍高阶多项式内插的阶。
图4示出根据RF校准电路12的替代实施例的图1中示出的RF校准电路12的细节。RF校准电路12包括校准包络电源30、RF组合器和放大器32、RF负载、衰减器、以及分流器34、本地振荡器36、第一同相混频器38、第一正交相位混频器40、第二同相混频器42、第二正交相位混频器44、同相数模转换器(DAC)46、正交相位DAC48、同相模数转换器(ADC)50、以及正交相位ADC52。
在校准RF PA14的校准期间，校准包络电源30提供校准包络电源信号CEPS给校准RF PA14，RF组合器和放大器32提供校准RF输入信号CRFI给校准RF PA14，并且RF负载、衰减器、以及分流器34从校准RF PA14接收校准RF输出信号CRFO。本地振荡器36提供同相本地振荡器信号LOI给第一同相混频器38和第二同相混频器42。本地振荡器36提供正交相位本地振荡器信号LOQ给第一正交相位混频器40并且提供给第二正交相位混频器44。在校准期间，正交相位本地振荡器信号LOQ从同相本地振荡器信号LOI相移约90度。
同相DAC46接收并数模转换同相数字输入信号DII以向第一同相混频器38馈送。正交相位DAC48接收并数模转换正交相位数字输入信号DQI以向第一正交相位混频器40馈送。在校准期间，第一同相混频器38和第一正交相位混频器40使用本地振荡器信号LOI、LOQ上变频同相和正交相位DAC输出信号以向RF组合器和放大器32馈送。RF组合器和放大器32组合并放大上变频的信号以提供校准RF输入信号CRFI。
在校准期间，RF负载、衰减器、和分流器34呈送RF负载给校准RF PA14。此外，RF负载、衰减器、和分流器34接收并分流校准RF输出信号CRFO以向第二同相混频器42和第二正交相位混频器44馈送。第二同相混频器42和第二正交相位混频器44使用本地振荡器信号LOI、LOQ下变频所分流的RF信号以向同相ADC50和正交相位ADC52馈送。同相ADC50模数转换来自第二同相混频器42的信号以提供同相数字输出信号DIO。正交相位ADC52模数转换来自第二正交相位混频器44的信号以提供正交相位数字输出信号DQO。
在校准期间，RF校准电路12可改变校准包络电源信号CEPS、同相本地振荡器信号LOI、正交相位本地振荡器信号LOQ、同相数字输入信号DII、正交相位数字输入信号DQI、或其任意组合，并经由同向数字输出信号DIO和正交相位数字输出信号DQO测量校准结果以提供RF PA校准数据16。
然而，校准期间会从多个噪声源引入了噪声。校准期间噪声源的例子可以包括本地振荡器信号LOI、LOQ到任意意外路径的泄漏、信号从本地振荡器36到任意意外路径的泄漏、同相本地振荡器信号LOI与正交相位本地振荡器信号LOQ之间的不均衡、同相DAC46和正交相位DAC48之间的转换失配、同相ADC50和正交相位ADC52之间的转换失配、第一同相混频器38和第一正交相位混频器40之间的转换失配、第二同相混频器42和第二正交相位混频器44之间的转换失配、引入到上变频路径中的噪声、引入到下变频路径中的噪声、或其任意组合。
图5示出根据电路10的一实施例的使用在RF通信***中的电路10。电路10包括RF发射机电路54、RF***控制电路56、RF前端电路58、RF天线60、和DC电源62。RF发射机电路54包括发射机控制电路64、RF PA66、包络跟踪电源68、和PA偏置电路70。RF***控制电路56包括基于单调响应曲线的数据28。
在电路10的一实施例中，RF前端电路58经由RF天线60接收、处理、和转发RF接收信号RFR给RF***控制电路56。RF***控制电路56提供包络电源控制信号VRMP和发射机配置信号PACS给发射机控制电路64。RF***控制电路56提供RF输入信号RFI给RF PA66。DC电源62提供DC源信号VDC给包络跟踪电源68。在DC电源62的一实施例中，DC电源62是电池。
发射机控制电路64耦合至包络跟踪电源68并耦合至PA偏置电路70。基于包络电源控制信号VRMP，包络跟踪电源68提供包络电源信号EPS给RF PA66。DC源信号VDC提供功率给包络跟踪电源68。如此，包络电源信号EPS基于DC源信号VDC。包络电源控制信号VRMP代表包络电源信号EPS的设置点。通常，包络电源信号EPS基于包络电源控制信号VRMP。使用包络电源信号EPS，RF PA66接收并放大RF输入信号RFI以提供RF传输信号RFT。包络电源信号EPS提供用于放大的功率。
通过使用基于单调响应曲线的数据28提供包络电源控制信号VRMP，RF***控制电路56可增强RF PA66的准确操作，使得包络电源控制信号VRMP的量值基于RF输入信号RFI的量值。在基于单调响应曲线的数据28的一实施例中，基于单调响应曲线的数据28是基于LUT的RF PA校准数据26(图3)的预失真以降低包络电源信号EPS上的噪声，使得包络电源信号EPS基于包络电源控制信号VRMP。在RF PA66的一实施例中，RF PA66是校准RF PA14(图1)。在RF PA66的替代实施例中，RF PA66不是校准RF PA14(图1)。
经由RF天线60，RF前端电路58接收、处理、并传输RF传输信号RFT。在RF发射机电路54的一实施例中，基于发射机配置信号PACS，发射机控制电路64配置RF发射机电路54。PA偏置电路70提供PA偏置信号PAB给RF PA66。在这点上，经由PA偏置信号PAB，PA偏置电路70偏置RF PA66。在PA偏置电路70的一实施例中，基于发射机配置信号PACS，PA偏置电路70偏置RF PA66。在RF前端电路58的一实施例中，RF前端电路58包括至少一个RF开关、至少一个RF放大器、至少一个RF滤波器、至少一个RF双工器、至少一个RF共用器(diplexer)、至少一个RF放大器等、或其任意组合。在RF***控制电路56的一实施例中，RF***控制电路56是RF发射机电路，其可以包括RF收发器IC、基带控制器电路等、或其任意组合。在RF发射机电路54的一实施例中，包络电源信号EPS提供用于放大的功率并且包络跟踪RF传输信号RFT。
图6示出根据电路10的替代实施例的使用在RF通信***中的电路10。图6中示出的电路10类似于图5中示出的电路10，除了图6中示出的电路10中，RF发射机电路54进一步包括数字通信接口72，其耦合在发射机控制电路64和数字通信总线74之间。数字通信总线74也耦合至RF***控制电路56。如此，经由数字通信总线74和数字通信接口72，RF***控制电路56提供包络电源控制信号VRMP(图5)和发射机配置信号PACS(图5)给发射机控制电路64。
图7示出根据电路10的附加实施例的使用在RF通信***中的电路10。图7示出根据包络跟踪电源68的一实施例的图5中示出的包络跟踪电源68的细节。包络跟踪电源68包括电源控制电路76、并行放大器78、和开关电源80。电源控制电路76控制并行放大器78和开关电源80。并行放大器78和开关电源80提供包络电源信号EPS，使得并行放大器78部分地提供包络电源信号EPS并且开关电源80部分地提供包络电源信号EPS。开关电源80比并行放大器78更高效地提供功率。然而，并行放大器78比开关电源80更准确地提供包络电源信号EPS。如此，基于包络电源信号EPS的设置点，并行放大器78调节包络电源信号EPS的电压，并且开关电源80操作以驱动来自并行放大器78的输出电流朝向零以最大化效率。在这点上，并行放大器78运转类似电压源并且开关电源80运转类似电流源。
图8示出根据电路10的另一实施例的使用在RF通信***中的电路10。图8中示出的电路10类似于图5中示出的电路10，除了图8中示出的电路10中，RF***控制电路56包括数据存储器22和处理电路24。数据存储器22包括基于LUT的RF PA校准数据26和基于单调响应曲线的数据28。
基于单调响应曲线的数据28基于单调响应曲线20(图2)。在基于单调响应曲线的数据28的一实施例中，基于单调响应曲线的数据28是基于LUT的数据。处理电路24转换基于LUT的RF PA校准数据26的至少一部分以提供基于单调响应曲线的数据28。在基于单调响应曲线的数据28的一实施例中，基于单调响应曲线的数据28是基于LUT的RF PA校准数据26的预失真以减少包络电源信号EPS上的噪声。
通过使用基于单调响应曲线的数据28提供包络电源控制信号VRMP，RF***控制电路56可以增强RF PA66的准确操作，使得包络电源控制信号VRMP的量值基于RF输入信号RFI的量值。在电路10的一实施例中，针对在RF功率范附上的近似恒定增益操作，基于LUT的RF PA校准数据26基于操作RF PA66。
图9示出根据电路10的进一步实施例的使用在RF通信***中的电路10。图9中示出的电路10类似于图8中示出的电路10，除了图9中示出的电路10中，RF发射机电路54进一步包括数字通信接口72，其耦合于发射机控制电路64和数字通信总线74之间。数字通信总线74也耦合于RF***控制电路56。如此，经由数字通信总线74和数字通信接口72，RF***控制电路56提供包络电源控制信号VRMP(图8)和发射机配置信号PACS(图8)给发射机控制电路64。
图10示出根据电路10的补充实施例的使用在RF通信***中的电路10。图10中示出的电路10类似于图5中示出的电路10，除了图10中示出的电路10中，发射机控制电路64包括数据存储器22和处理电路24。通常，RF发射机电路54包络数据存储器22和处理电路24。数据存储器22包络基于LUT的RFPA校准数据26和基于单调响应曲线的数据28。此外，RF***控制电路56提供未修改的包络电源控制信号VRPU代替包络电源控制信号VRMP给发射机控制电路64。
基于单调响应曲线的数据28基于单调响应曲线20(图2)。在基于单调响应曲线的数据28的一实施例中，基于单调响应曲线的数据28是基于LUT的数据。处理电路24转换基于LUT的RF PA校准数据26的至少一部分以提供基于单调响应曲线的数据28。在基于单调响应曲线的数据28的一实施例中，基于单调响应曲线的数据28是基于LUT的RF PA校准数据26的预失真以减少包络电源信号EPS上的噪声。
通过使用基于单调响应曲线的数据28提供包络电源控制信号VRMP(未示出)给包络跟踪电源68，发射机控制电路64可增强RF PA66的准确操作，使得包络电源控制信号VRMP(未示出)的量值基于RF输入信号RFI和未修改的包络电源控制信号VRPU的量值。基于包络电源控制信号VRMP(未示出)，RF发射机电路54提供包络电源信号EPS给RF PA66。在电路10的一实施例中，针对在RF功率范围上的近似恒定增益操作，基于LUT的RF PA校准数据26基于操作RF PA66。
图11示出根据电路10的一实施例的使用在RF通信***中的电路10。图11中示出的电路10类似于图10中示出的电路10，除了在图11中示出的电路10中，RF发射机电路54进一步包括数字通信接口72，其耦合于发射机控制电路64和数字通信总线74之间。数字通信总线74也耦合于RF***控制电路56。如此，经由数字通信总线74和数字通信接口72，RF***控制电路56提供未修改的包络电源控制信号VRPU(图10)和发射机配置信号PACS(图10)给发射机控制电路64。
本领域技术人员将意识到对本公开的实施例的改进和修改。所有这样的改进和修改被认为在此处公开的概念和以下的权利要求书的范围内。

Claims (24)

1.一种电路，包括：
数据存储器，其适于存储基于查找表(LUT)的射频(RF)功率放大器(PA)校准数据；和
处理电路，其适于转换基于LUT的RF PA校准数据的至少一部分以提供基于单调响应曲线的数据，其中包络电源控制信号的量值基于RF输入信号的量值并且使用所述基于单调响应曲线的数据。
2.如权利要求1的电路，其中所述基于单调响应曲线的数据是基于LUT的RF PA校准数据的预失真以减少包络电源信号上的噪声，其中所述包络电源信号基于所述包络电源控制信号。
3.如权利要求1的电路，其中所述基于单调响应曲线的数据以及基于LUT的RF PA校准数据的至少一部分的高阶多项式内插为基础。
4.如权利要求3的电路，其中使用在高阶多项式内插中的数据点的数量至少十倍于所述高阶多项式内插的阶。
5.如权利要求1的电路，其中所述基于单调响应曲线的数据是基于LUT的数据。
6.如权利要求1的电路，其中针对在校准RF功率范围上的近似恒定增益操作，基于LUT的RF PA校准数据基于对校准RF PA进行校准。
7.如权利要求1的电路，其中所述基于单调响应曲线的数据基于单调响应曲线，所述单调响应曲线代表相对于校准RF输入信号的校准包络电源信号。
8.如权利要求7的电路，其中当所述校准RF输入信号的包络增加时，校准包络电源信号的量值从不减少。
9.如权利要求7的电路，其中使用所述校准包络电源信号提供用于放大的功率，校准RF PA适于接收并放大校准RF输入信号以提供校准RF输出信号。
10.如权利要求9的电路，其中：
包络电源信号基于所述包络电源控制信号；
使用所述包络电源信号以提供用于放大的功率，RF PA适于接收并放大RF输入信号以提供RF传输信号；和
所述RF PA是校准RF PA。
11.如权利要求9的电路，其中：
包络电源信号基于所述包络电源控制信号；
使用所述包络电源信号提供用于放大的功率，RF PA适于接收并放大RF输入信号以提供RF传输信号；和
所述RF PA不是校准RF PA。
12.如权利要求1的电路，进一步包括RF校准电路，其包括所述数据存储器和所述处理电路。
13.如权利要求12的电路，其中RF***控制电路适于使用所述基于单调响应曲线的数据基于RF输入信号的量值来提供所述包络电源控制信号。
14.如权利要求13的电路，其中所述RF***控制电路进一步适于提供RF输入信号。
15.如权利要求13的电路，其中所述RF***控制电路进一步适于经由数字通信总线提供所述包络电源控制信号。
16.如权利要求1的电路，进一步包括RF***控制电路，其包括所述数据存储器和所述处理电路。
17.如权利要求16的电路，其中所述RF***控制电路适于使用所述基于单调响应曲线的数据基于RF输入信号的量值来提供所述包络电源控制信号。
18.如权利要求17的电路，其中所述RF***控制电路进一步适于提供RF输入信号。
19.如权利要求17的电路，其中所述RF***控制电路进一步适于经由数字通信总线提供所述包络电源控制信号。
20.如权利要求1的电路，进一步包括RF发射机电路，其包括所述数据存储器和所述处理电路。
21.如权利要求20的电路，其中所述RF发射机电路适于基于所述包络电源控制信号提供包络电源信号。
22.如权利要求21的电路，其中所述RF发射机电路包括RF PA，所述RF PA适于使用所述包络电源信号以提供用于放大的功率接收并放大RF输入信号以提供RF传输信号。
23.如权利要求20的电路，其中所述RF发射机电路进一步适于经由数字通信总线接收未修改的包络电源控制信号。
24.一种方法，包括：
存储基于查找表(LUT)的射频(RF)功率放大器(PA)校准数据；和
转换基于LUT的RF PA校准数据的至少一部分以提供基于单调响应曲线的数据，其中包络电源控制信号的量值基于RF输入信号的量值并且使用所述基于单调响应曲线的数据。
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