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1. 发明授权

US5710990A Transmitter which adjusts peak-to-average power of a multicarrier signal by switching between a group of channels and a phase-adjusted group of channels 失效
标题翻译：发射机，其通过在一组信道和经相位调整的信道组之间切换来调整多载波信号的峰均功率
公开(公告)号：US5710990A
公开(公告)日：1998-01-20
申请号：US619391
申请日：1996-03-21
申请人： James Frank Long , Yuda Y. Luz
发明人： James Frank Long , Yuda Y. Luz
IPC分类号： H01Q3/26 , H03G3/30 , H04L27/26 , H04B1/02 , H01Q1/04 , H01Q11/12
CPC分类号： H03G3/3042 , H01Q3/26 , H04L27/2614
摘要： An apparatus (10) for adjusting peak-to-average power of a multicarrier signal. The apparatus (10) comprises a first (26) and second (28) combiner, a phase-changing device (30), and a switch (36). The first combiner (26) receives a first group of channels (20) and a second group of channels (22) and produces a first combined signal (46). The phase-changing device (30) receives the first group of channels (20) and produces a group of phase-adjusted channels. The second combiner (28) receives the phase-adjusted channels and the second group of channels (22) and produces a second combined signal (48), and the switch (36) responds to the first (26) and second (28) combiners and selects at least one of the first (46) and second (48) combined signals.
摘要翻译：一种用于调整多载波信号的峰均功率的装置（10）。装置（10）包括第一（26）和第二（28）组合器，相变装置（30）和开关（36）。第一组合器（26）接收第一组信道（20）和第二组信道（22）并产生第一组合信号（46）。相变装置（30）接收第一组信道（20）并产生一组相位调整的信道。第二组合器（28）接收相位调整的通道和第二组通道（22）并产生第二组合信号（48），并且开关（36）响应第一（26）和第二（28）组合器并选择第一（46）和第二（48）组合信号中的至少一个。

2. 发明授权

US5886575A Apparatus and method for amplifying a signal 失效
标题翻译：用于放大信号的装置和方法
公开(公告)号：US5886575A
公开(公告)日：1999-03-23
申请号：US940563
申请日：1997-09-30
申请人： James Frank Long
发明人： James Frank Long
IPC分类号： H03F1/32 , H03F1/02 , H03F1/07 , H03G3/20 , H03G3/30
CPC分类号： H03G3/3042 , H03F1/0238 , H03F1/0277 , H03F1/0288
摘要： The apparatus includes an amplifier (204) having an input and an output, the amplifier output coupled to an input of a Doherty amplifier (208). The Doherty amplifier (208) includes a control input and a Doherty output. The apparatus further includes a detector (224) having an input coupled to the output of the Doherty amplifier (208). The detector provides a detected signal at its output, to a controller (228), the controller responding to the detected signal by producing a first (230) and second control output (231). The first control output is coupled to a switching regulator (232) input, the switching regulator having an output coupled to the control input of the Doherty amplifier. The second control output is coupled to a control input of a variable attenuator (202), the output of the variable attenuator coupled to the input of the amplifier (204).
摘要翻译：该装置包括具有输入和输出的放大器（204），放大器输出耦合到Doherty放大器（208）的输入端。 Doherty放大器（208）包括控制输入和Doherty输出。该装置还包括具有耦合到多赫蒂放大器（208）的输出的输入的检测器（224）。检测器在其输出处向控制器（228）提供检测信号，控制器（228）通过产生第一（230）和第二控制输出（231）来响应于检测到的信号。第一控制输出耦合到开关稳压器（232）输入，开关稳压器具有耦合到Doherty放大器的控制输入的输出。第二控制输出耦合到可变衰减器（202）的控制输入，可变衰减器的输出耦合到放大器（204）的输入端。

3. 发明授权

US5831478A Feedforward amplifier 失效
标题翻译：前馈放大器
公开(公告)号：US5831478A
公开(公告)日：1998-11-03
申请号：US940545
申请日：1997-09-30
申请人： James Frank Long
发明人： James Frank Long
IPC分类号： H03F1/32 , H03F3/66 , H03F1/26
CPC分类号： H03F1/3229 , H03F2201/3215
摘要： A method and apparatus in a feedforward amplifier (100) includes a summer (293) summing the desired signal (12) with a pair of tag signals (241, 242). An error signal (226) is coupled with a delayed version of the summed signal (48). The phase and amplitude of signals (226, 237) are adjusted according to a first and second gradient decent controllers (221, 231) output signal (225) which is based on the first DC signal (224) and output signal (235). The output signal (235) is based on the detected power level of a leaked signal at the output coupler (62). The adjustment of the input signal (237) to the second amplifier, when the detected power level fluctuation exceeds a predetermined threshold level, is repeated. The tag signals (241) are produced in phase lock with the sweeping detecting (222) function.
摘要翻译：前馈放大器（100）中的方法和装置包括用希望信号（12）与一对标签信号（241,242）相加的加法器（293）。误差信号（226）与加和信号（48）的延迟版本耦合。根据基于第一DC信号（224）和输出信号（235）的第一和第二梯度仪控制器（221,231）输出信号（225）来调整信号（226,237）的相位和幅度。输出信号（235）基于在输出耦合器（62）处检测到的泄漏信号的功率电平。当检测到的功率电平波动超过预定阈值电平时，输入信号（237）到第二放大器的调整被重复。标签信号（241）通过扫描检测（222）功能进行锁相产生。

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