公开(公告)号：US08749305B2

公开(公告)日：2014-06-10

申请号：US13644089

申请日：2012-10-03

Applicant: RF Micro Devices, Inc.

Inventor： James M. Retz ,  Ruediger Bauder

IPC: H03F1/14

CPC classification number: G05F3/02 ,  H03F1/0277 ,  H03F3/211 ,  H03F3/24 ,  H03F3/72 ,  H03F2203/7215 ,  H03F2203/7221

Abstract: The embodiments disclosed in the detailed description include a power amplifier having a low power mode amplifier, a medium power mode amplifier, and a high power mode amplifier in communication with a radio frequency (RF) output load. The exemplary embodiments of the power amplifier permit a wireless device to select the most power efficient means to transmit an RF signal based upon the desired output power level.

Abstract translation: 详细描述中公开的实施例包括具有低功率模式放大器，中功率模式放大器和与射频（RF）输出负载通信的高功率模式放大器的功率放大器。 功率放大器的示例性实施例允许无线设备基于期望的输出功率电平来选择用于发射RF信号的最高功率的装置。

公开(公告)号：US09853608B2

公开(公告)日：2017-12-26

申请号：US15079204

申请日：2016-03-24

Applicant: RF Micro Devices, Inc.

Inventor： James M. Retz ,  Jeff Kaminski

IPC: H04B1/04 ,  H03F1/30 ,  H03F3/19 ,  H03F3/21 ,  H03G3/30 ,  H03F1/02 ,  H03F3/24

CPC classification number: H03F1/30 ,  H03F1/0227 ,  H03F1/0233 ,  H03F1/3241 ,  H03F3/19 ,  H03F3/21 ,  H03F3/245 ,  H03F2200/105 ,  H03F2200/336 ,  H03F2200/447 ,  H03F2200/451 ,  H03G3/3042 ,  H04B1/0475 ,  H04B2001/0416 ,  H04B2001/0425

Abstract: Disclosed is an envelope tracking (ET) system having a transmit (TX) section, a power amplifier (PA), a fast switched-mode power supply (Fast SMPS), and control circuitry. The TX section receives an input signal and provides a modulated signal to the PA. The TX section also generates an ET signal based on a modulation envelope of the modulated signal. The TX section provides an envelope control (EC) signal based on the ET signal to modulate a supply signal provided to the PA by the Fast SMPS. The control circuitry provides a transmit TX gain signal and an ET gain signal to the TX section based on a PA temperature signal, a TX temperature signal, a target power signal, a measured power signal. The control circuitry is configured to maintain the efficiency and linearity of the PA over a wide operating temperature range.

公开(公告)号：US20160373071A1

公开(公告)日：2016-12-22

申请号：US15079204

申请日：2016-03-24

Applicant: RF Micro Devices, Inc.

Inventor： James M. Retz ,  Jeff Kaminski

IPC: H03F1/30 ,  H04B1/04 ,  H03G3/30 ,  H03F3/19 ,  H03F3/21

CPC classification number: H03F1/30 ,  H03F1/0227 ,  H03F1/0233 ,  H03F1/3241 ,  H03F3/19 ,  H03F3/21 ,  H03F3/245 ,  H03F2200/105 ,  H03F2200/336 ,  H03F2200/447 ,  H03F2200/451 ,  H03G3/3042 ,  H04B1/0475 ,  H04B2001/0416 ,  H04B2001/0425

Abstract: Disclosed is an envelope tracking (ET) system having a transmit (TX) section, a power amplifier (PA), a fast switched-mode power supply (Fast SMPS), and control circuitry. The TX section receives an input signal and provides a modulated signal to the PA. The TX section also generates an ET signal based on a modulation envelope of the modulated signal. The TX section provides an envelope control (EC) signal based on the ET signal to modulate a supply signal provided to the PA by the Fast SMPS. The control circuitry provides a transmit TX gain signal and an ET gain signal to the TX section based on a PA temperature signal, a TX temperature signal, a target power signal, a measured power signal. The control circuitry is configured to maintain the efficiency and linearity of the PA over a wide operating temperature range.

Abstract translation: 公开了具有发射（TX）部分，功率放大器（PA），快速开关模式电源（Fast SMPS）和控制电路的信封跟踪（ET）系统。 TX部分接收输入信号并向PA提供调制信号。 TX部分还基于调制信号的调制包络生成ET信号。 TX部分提供基于ET信号的信封控制（EC）信号，以调制由快速SMPS提供给PA的电源信号。 控制电路基于PA温度信号，TX温度信号，目标功率信号，测量的功率信号，向TX部分提供发射TX增益信号和ET增益信号。 控制电路被配置为在宽的工作温度范围内保持PA的效率和线性。