公开(公告)号：WO2002101944A2

公开(公告)日：2002-12-19

申请号：PCT/US2002/016636

申请日：2002-05-29

Applicant: RF MICRO DEVICES, INC.

Inventor： EPPERSON, Darrell ,  QUIST, Leendert

IPC: H04B1/00

CPC classification number: H03F1/0211 ,  H03F2200/408 ,  H03F2200/504 ,  H03F2200/516 ,  H03G3/004 ,  H03G3/3047

Abstract: The present invention provides for power amplifier control of amplifier circuitry including an input stage and one or more output stages. The input stage is powered separately from the output stage by a relatively fixed power source. The one or more output stages are supplied with power via a voltage regulator having a controllable output voltage. A closed loop control integrated with the amplifier stages forces the voltage output of the voltage regulator to track the profile of an adjustable control signal, such as V RAMP .

Abstract translation: 本发明提供了包括输入级和一个或多个输出级的放大器电路的功率放大器控制。 输入级通过相对固定的电源与输出级分开供电。 一个或多个输出级通过具有可控输出电压的电压调节器供电。 与放大器级集成的闭环控制迫使电压调节器的电压输出跟踪可调控制信号（例如VRAMP）的分布。

公开(公告)号：WO2002075920A2

公开(公告)日：2002-09-26

申请号：PCT/US2002/006483

申请日：2002-03-05

Applicant: RF MICRO DEVICES, INC.

Inventor： STEEL, Victor, E. ,  JORGENSON, Jon, D. ,  VU, Khoi, Tam

IPC: H03F1/02

CPC classification number: H03F1/0277 ,  H03F1/0261 ,  H03F3/211 ,  H03F3/245 ,  H03F2200/411 ,  H03F2200/451 ,  H03F2203/21191 ,  H03F2203/21193

Abstract: An amplifier provides two or more selectively enabled amplifier segments allowing a source signal to be amplified with a selectable output power. A bias circuit responsive to a bias control signal enables selectable combinations of one or more amplifier segments, thus allowing selection of a desired output power. Selecting a desired output signal power via the bias control signal corresponds to selecting an overall amplifier quiescent current that decreases with decreasing output signal power. Thus, the amplifier permits a controlling system, such as a mobile terminal (e.g., cellular telephone) to amplify a transmit signal with a selectable transmit signal output power and corresponding level of amplifier quiescent power consumption. Preferably, each segment comprises one or more transistor amplification stages which, when enabled by the bias circuit, are biased to permit maximum power linear amplification for the transmit signal.

Abstract translation: 放大器提供两个或更多个选择性使能的放大器段，允许以可选择的输出功率放大源信号。 响应于偏置控制信号的偏置电路使得能够选择一个或多个放大器段的组合，从而允许选择期望的输出功率。 通过偏置控制信号选择所需的输出信号功率对应于选择随着输出信号功率的降低而减小的整体放大器静态电流。 因此，放大器允许诸如移动终端（例如，蜂窝电话）之类的控制系统以可选择的发射信号输出功率和相应的放大器静态功率消耗水平来放大发射信号。 优选地，每个段包括一个或多个晶体管放大级，当由偏置电路使能时，该晶体管放大级被偏置以允许发射信号的最大功率线性放大。

公开(公告)号：WO0211304A3

公开(公告)日：2002-07-04

申请号：PCT/US0123726

申请日：2001-07-27

Applicant: RF MICRO DEVICES INC

Inventor： SHAN PEIJUN ,  KING ERIC J

IPC: H04B1/7107 ,  H04B1/7113 ,  H04B1/7115 ,  H04B1/7117 ,  H04B1/7183 ,  H04B1/707

CPC classification number: H04B1/7115 ,  H04B1/7107 ,  H04B1/7113 ,  H04B1/7117 ,  H04B1/7183

Abstract: A training method provides and advantageous technique for estimating secondary propagation path parameters based on learming propagation path characteristics for a selected number of secondary propagation path signals. In a multipath environment, a received radio signal comprises multiple received signals, each received through a different signal propagation path. The training method includes a course search technique that yields initial identification of the significant secondary path signals, and further includes techniques for characterizing the magnitude, phase, and path delay, all relative to the main path signal for secondary path signal of interest. The training method employs differential decoding and sample phase slicing to improve parameter estimation accuracy, and further includes phase correlation operations to determine secondary path delay, where such delays may have spreads that exceed a transmitted signal symbol period.

Abstract translation: 训练方法提供了一种基于用于所选次数传播路径信号的二次传播路径特性来估计二次传播路径参数的有利技术。 在多径环境中，接收的无线电信号包括多个接收信号，每个接收信号通过不同的信号传播路径接收。 训练方法包括产生重要二次路径信号的初始识别的课程搜索技术，并且还包括用于表征幅度，相位和路径延迟的技术，全部相对于感兴趣的辅助路径信号的主路径信号。 训练方法采用差分解码和采样相位切片来提高参数估计精度，并且还包括相位相关运算以确定次级路径延迟，其中这样的延迟可能具有超过发射信号符号周期的扩展。