公开(公告)号：US20060084403A1

公开(公告)日：2006-04-20

申请号：US10970098

申请日：2004-10-20

申请人： Benjamin Gilsdorf ,  Gilles Montoriol ,  David Newman ,  Jacques Trichet

发明人： Benjamin Gilsdorf ,  Gilles Montoriol ,  David Newman ,  Jacques Trichet

IPC分类号： H04B1/06

CPC分类号： H03F1/30 ,  H03F1/0211 ,  H03F3/24 ,  H03F3/72 ,  H03F2200/78 ,  H04B2001/0408

摘要： A radio frequency (RF) power amplification circuit including a power amplifier is provided for preventing breakdown of the power amplifier. The power amplifier includes an input for receiving RF signals and an output for providing amplified RF signals. The RF power amplification circuit also includes a bias circuit coupled to the input of the power amplifier to permit normal operation of the power amplifier when the base current is below a predetermined current threshold and to prevent normal operation of the power amplifier when the base current is above the predetermined current threshold.

摘要翻译： 提供了包括功率放大器的射频（RF）功率放大电路，用于防止功率放大器的击穿。 功率放大器包括用于接收RF信号的输入和用于提供放大的RF信号的输出。 RF功率放大电路还包括耦合到功率放大器的输入端的偏置电路，以便当基极电流低于预定电流阈值时允许功率放大器的正常操作，并且当基极电流为基极电流时，防止功率放大器的正常工作 高于预定电流阈值。

公开(公告)号：US20130039438A1

公开(公告)日：2013-02-14

申请号：US13207786

申请日：2011-08-11

申请人： Omid Oliaei ,  David Newman ,  Benjamin Gilsdorf ,  Patrick L. Rakers

发明人： Omid Oliaei ,  David Newman ,  Benjamin Gilsdorf ,  Patrick L. Rakers

IPC分类号： H04L27/00

CPC分类号： H03D7/1441 ,  H03D7/1458 ,  H03D2200/0023 ,  H04B1/0057 ,  H04B1/0483

摘要： In accordance with some embodiments of the present disclosure, a multi-band transmitter comprises a plurality of band paths with each band path configured for a different frequency range. Each band path comprises a modulator configured to modulate a data signal onto a carrier signal associated with the frequency range of the band path to generate a radio frequency (RF) signal associated with the band path and frequency range of the band path. Each band path also comprises a step-down balun that includes an input coil configured to receive the RF signal from the modulator. Each band path further comprises a tuner configured to tune the input coil to the frequency range of the band path. The tuner is also configured to compensate for off-state conduction of switches of the tuner to reduce non-linear tuning effects of the balun associated with the off-state conduction.

摘要翻译： 根据本公开的一些实施例，多频带发射机包括多个频带路径，每个频带路径被配置用于不同的频率范围。 每个频带路径包括被配置为将数据信号调制到与频带路径的频率范围相关联的载波信号上以产生与频带路径的频带路径和频带范围相关联的射频（RF）信号的调制器。 每个频带路径还包括降压平衡 - 不平衡变压器，其包括被配置为从调制器接收RF信号的输入线圈。 每个频带路径还包括被配置为将输入线圈调谐到频带路径的频率范围的调谐器。 调谐器还被配置为补偿调谐器的开关的截止状态传导，以减少与断开状态传导相关联的平衡 - 不平衡变换器的非线性调谐效应。

公开(公告)号：US08447246B2

公开(公告)日：2013-05-21

申请号：US13207786

申请日：2011-08-11

申请人： Omid Oliaei ,  David Newman ,  Benjamin Gilsdorf ,  Patrick L. Rakers

发明人： Omid Oliaei ,  David Newman ,  Benjamin Gilsdorf ,  Patrick L. Rakers

IPC分类号： H04B1/04

CPC分类号： H03D7/1441 ,  H03D7/1458 ,  H03D2200/0023 ,  H04B1/0057 ,  H04B1/0483

摘要： In accordance with some embodiments of the present disclosure, a multi-band transmitter comprises a plurality of band paths with each band path configured for a different frequency range. Each band path comprises a modulator configured to modulate a data signal onto a carrier signal associated with the frequency range of the band path to generate a radio frequency (RF) signal associated with the band path and frequency range of the band path. Each band path also comprises a step-down balun that includes an input coil configured to receive the RF signal from the modulator. Each band path further comprises a tuner configured to tune the input coil to the frequency range of the band path. The tuner is also configured to compensate for off-state conduction of switches of the tuner to reduce non-linear tuning effects of the balun associated with the off-state conduction.

摘要翻译： 根据本公开的一些实施例，多频带发射机包括多个频带路径，每个频带路径被配置用于不同的频率范围。 每个频带路径包括被配置为将数据信号调制到与频带路径的频率范围相关联的载波信号上以产生与频带路径的频带路径和频带范围相关联的射频（RF）信号的调制器。 每个频带路径还包括降压平衡 - 不平衡变压器，其包括被配置为从调制器接收RF信号的输入线圈。 每个频带路径还包括被配置为将输入线圈调谐到频带路径的频率范围的调谐器。 调谐器还被配置为补偿调谐器的开关的截止状态传导，以减少与断开状态传导相关联的平衡 - 不平衡变换器的非线性调谐效应。

公开(公告)号：US20070026838A1

公开(公告)日：2007-02-01

申请号：US11191687

申请日：2005-07-27

申请人： Joseph Staudinger ,  Benjamin Gilsdorf ,  David Newman ,  George Norris ,  Gary Sadowniczak ,  Richard Sherman

发明人： Joseph Staudinger ,  Benjamin Gilsdorf ,  David Newman ,  George Norris ,  Gary Sadowniczak ,  Richard Sherman

IPC分类号： H04B1/16

CPC分类号： H04B1/0458 ,  H03F1/0205 ,  H03F1/0261 ,  H03F1/32 ,  H03F3/24 ,  H03F2200/105 ,  H03G3/3047 ,  H04B2001/0416

摘要： A radio frequency (“RF”) power amplifier circuit as described herein is configured to detect and measure an output load mismatch and to adjust the operating characteristics of the RF power amplifier to reduce output signal distortion. The circuit includes a directional RF signal coupler that obtains a coupled reflected RF signal that is indicative of the output load mismatch. The coupled reflected RF signal is processed to generate one or more bias control signals for the RF power amplifier. In operation, a mismatch condition will result in a measurable coupled reflected RF signal and a corresponding reduction in output power from the RF power amplifier. Ultimately, the output power control mechanism strives to maintain the RF power amplifier within a linear operating range.

摘要翻译： 如本文所述的射频（“RF”）功率放大器电路被配置为检测和测量输出负载失配并且调整RF功率放大器的工作特性以减小输出信号失真。 该电路包括定向RF信号耦合器，其获得指示输出负载不匹配的耦合的反射RF信号。 处理耦合的反射RF信号以产生用于RF功率放大器的一个或多个偏置控制信号。 在操作中，不匹配条件将导致可测量的耦合反射RF信号和来自RF功率放大器的输出功率的相应降低。 最终，输出功率控制机制致力于将RF功率放大器维持在线性工作范围内。

公开(公告)号：US20070109055A1

公开(公告)日：2007-05-17

申请号：US11282734

申请日：2005-11-17

申请人： George Norris ,  Benjamin Gilsdorf ,  David Newman

发明人： George Norris ,  Benjamin Gilsdorf ,  David Newman

IPC分类号： H03F1/52

CPC分类号： H03F3/24 ,  H03F1/0205 ,  H03F1/32 ,  H03F3/189 ,  H03F2200/78

摘要： A soft saturation detection circuit for a radio frequency (“RF”) power amplifier is configured to detect the onset of soft saturation in an unambiguous and accurate manner. The circuit compares the time derivative of a voltage signal indicative of the RF output power to the time derivative of a control voltage signal for the RF power amplifier. The circuit also employs a gating mechanism that ensures that a soft saturation indication signal is generated under appropriate operating conditions.

摘要翻译： 用于射频（“RF”）功率放大器的软饱和度检测电路被配置为以明确和准确的方式检测软饱和的开始。 电路将指示RF输出功率的电压信号的时间导数与RF功率放大器的控制电压信号的时间导数进行比较。 电路还采用门控机构，确保在适当的工作条件下产生软饱和指示信号。

公开(公告)号：US20070052481A1

公开(公告)日：2007-03-08

申请号：US11222545

申请日：2005-09-08

申请人： David Newman ,  Benjamin Gilsdorf ,  David Peckham

发明人： David Newman ,  Benjamin Gilsdorf ,  David Peckham

IPC分类号： H03F1/52

CPC分类号： H03F3/189 ,  H03F1/52

摘要： Method and apparatus are provided for protecting radio frequency (RF) power amplifiers. A circuit (10) is provided for limiting a supply current to a first stage (Q3) of the RF power amplifier having a second stage (Q2) coupled to the first stage. The circuit comprises a comparator (14) having first and second inputs and an output, and a switching circuit (12, 20, 22, 24) having an input coupled to the output of the comparator (14) and having an output configured to couple to the first stage (Q3). The first input of the comparator (14) is configured to receive the supply current, and the second input is configured to receive a current supplied to the second stage (Q2). The comparator (14) is configured to compare a ratio of the supply current to the first stage to the current supplied to the second stage (Q2) with a predetermined value. The switching circuit (12, 20, 22, 24) is configured to limit the supply current to the first stage (Q3) when the ratio exceeds the predetermined value.

摘要翻译： 提供了用于保护射频（RF）功率放大器的方法和装置。 提供电路（10）用于限制具有耦合到第一级的第二级（Q 2）的RF功率放大器的第一级（Q 3）的电源电流。 该电路包括具有第一和第二输入和一个输出的比较器（14）和一个具有耦合到比较器（14）的输出的输入的开关电路（12,20,22,24），并且具有被配置为耦合的输出 到第一阶段（问3）。 比较器（14）的第一输入被配置为接收电源电流，并且第二输入被配置为接收提供给第二级（Q 2）的电流。 比较器（14）被配置为将供应电流与第一级的比率与以第一级提供给第二级（Q 2）的电流进行比较。 开关电路（12,20,22,24）被配置为当该比率超过预定值时将供电电流限制到第一级（Q 3）。