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71. 发明申请

US20050064827A1 Amplifier power control in frequency hopping applications and methods 有权
标题翻译：跳频功率放大器的应用和方法
公开(公告)号：US20050064827A1
公开(公告)日：2005-03-24
申请号：US10667794
申请日：2003-09-22
申请人： Lawrence Schumacher , Vimalkaushik Natarajan
发明人： Lawrence Schumacher , Vimalkaushik Natarajan
IPC分类号： H03C1/62 , H04B1/04 , H04B7/005 , H01Q11/12 , H04B17/00 , H04K1/02
CPC分类号： H04W52/52 , H03C1/62 , H03F1/3223 , H03F3/24 , H04B2001/0441
摘要： A method in an amplifier, for example, a power amplifier in a wireless transmitter, including monitoring (310) a characteristic of the amplifier during a first active interval of the first set of active intervals, storing (320) the amplifier characteristic monitored during the first active interval of the first set of active intervals, correcting (340) an open-loop control signal to the amplifier based on the stored amplifier characteristic monitored during the first active interval of the first set of active intervals, and providing (350) the corrected control signal during a second active interval of the set of first active intervals subsequent to the first active interval of the set of first active intervals.
摘要翻译：放大器中的方法，例如无线发射机中的功率放大器，包括在第一组有效间隔的第一有效间隔期间监测（310）放大器的特性，存储（320）在第一组有效间隔的第一有效间隔，基于在第一组有效间隔的第一有效间隔期间监测的存储的放大器特性，将开环控制信号校正（340）到放大器，并且（350）在第一活动间隔组的第一活动间隔之后的第一有效间隔组的第二活动间隔期间的校正控制信号。

72. 发明申请

US20050017800A1 System and method for reducing dynamic range and improving linearity in an amplication system 有权
公开(公告)号：US20050017800A1
公开(公告)日：2005-01-27
申请号：US10625367
申请日：2003-07-23
申请人： Ian Robinson
发明人： Ian Robinson
IPC分类号： H03F3/20 , H03F1/02 , H03F1/32 , H04B1/04 , H03F1/26
CPC分类号： H03F1/3241 , H03F1/3223 , H03F2200/331
摘要： An amplification system and method is provided that reduces peaks associated with an input signal, and provides correction, in one or more spectral bands, to signal distortion and out-of-band emissions that result from the peak reduction. The correction signal that removes signal distortion and OOB emissions associated with the peak reduction can be calculated or electronically derived. The correction signal can be combined with the peak reduced signal prior to or after amplification of the peak reduced input signal.

73. 发明授权

US06744314B2 Wideband power amplifier linearization technique 失效
标题翻译：宽带功率放大器线性化技术
公开(公告)号：US06744314B2
公开(公告)日：2004-06-01
申请号：US10174968
申请日：2002-06-20
申请人： Guang Fei Zhang , Xing Wang , Fabio Concilio , Tjo San Jao
发明人： Guang Fei Zhang , Xing Wang , Fabio Concilio , Tjo San Jao
IPC分类号： H03F126
CPC分类号： H03F1/3223
摘要： A novel linearization apparatus for reducing power amplifier distortion does not require delay lines. The apparatus includes a power amplifier and an error generator. The signals provided by the error generator (error signal) and the power amplifier are combined to subtract out the distortion introduced by the power amplifier. The error generator includes two auxiliary amplifiers, wherein one of the auxiliary amplifiers is operated in it saturated region and the other is operated in its non-saturated region. The power amplifier and the two auxiliary amplifiers have the same distortion characteristics and receive the same input signal. The auxiliary amplifier operating in its saturated region introduces distortion and the auxiliary amplifier operating in its non-saturated region does not introduce distortion. The two signals provided by the auxiliary amplifiers are combined to produce an error signal having a distortion component that is an approximate replica of the power amplifier distortion.
摘要翻译：用于降低功率放大器失真的新型线性化装置不需要延迟线。该装置包括功率放大器和误差发生器。由误差发生器（误差信号）和功率放大器提供的信号被组合以减去由功率放大器引入的失真。误差发生器包括两个辅助放大器，其中一个辅助放大器在其饱和区域中工作，另一个在其非饱和区域中工作。功率放大器和两个辅助放大器具有相同的失真特性并接收相同的输入信号。在其饱和区域工作的辅助放大器引入失真，并且在其非饱和区域中工作的辅助放大器不引入失真。由辅助放大器提供的两个信号被组合以产生具有作为功率放大器失真的近似副本的失真分量的误差信号。

74. 发明申请

US20040036532A1 Enhanced efficiency LDMOS based feed forward amplifier 有权
标题翻译：增强效率LDMOS前馈放大器
公开(公告)号：US20040036532A1
公开(公告)日：2004-02-26
申请号：US10633984
申请日：2003-08-04
发明人： Mark Gurvich , Nikolai Maslennikov
IPC分类号： H03F001/26
CPC分类号： H03F1/3247 , H03F1/0266 , H03F1/26 , H03F1/3223 , H03F1/3229 , H03F2200/102
摘要： A feed forward amplifier employing high efficiency main and/or error amplifiers with amplifier devices biased in a lower bias class. Small signal nonlinearities in the gain response of the amplifier devices are compensated by a small signal gain adjustment circuit. The resulting gain response is substantially linear over the entire usable range of RF input power.
摘要翻译：一种使用高效率主放大器和/或误差放大器的前馈放大器，其放大器器件偏置在较低的偏置等级。放大器器件的增益响应中的小信号非线性由小信号增益调整电路补偿。所得增益响应在RF输入功率的整个可用范围内基本上是线性的。

75. 发明申请

US20030234687A1 Wideband power amplifier linearization technique 失效
标题翻译：宽带功率放大器线性化技术
公开(公告)号：US20030234687A1
公开(公告)日：2003-12-25
申请号：US10174968
申请日：2002-06-20
发明人： Guang Fei Zhang , Xing Wang , Fabio Concilio , Tjo San Jao
IPC分类号： H03F001/26
CPC分类号： H03F1/3223
摘要： A novel linearization apparatus for reducing power amplifier distortion does not require delay lines. The apparatus includes a power amplifier and an error generator. The signals provided by the error generator (error signal) and the power amplifier are combined to subtract out the distortion introduced by the power amplifier. The error generator includes two auxiliary amplifiers, wherein one of the auxiliary amplifiers is operated in it saturated region and the other is operated in its non-saturated region. The power amplifier and the two auxiliary amplifiers have the same distortion characteristics and receive the same input signal. The auxiliary amplifier operating in its saturated region introduces distortion and the auxiliary amplifier operating in its non-saturated region does not introduce distortion. The two signals provided by the auxiliary amplifiers are combined to produce an error signal having a distortion component that is an approximate replica of the power amplifier distortion.
摘要翻译：用于降低功率放大器失真的新型线性化装置不需要延迟线。该装置包括功率放大器和误差发生器。由误差发生器（误差信号）和功率放大器提供的信号被组合以减去由功率放大器引入的失真。误差发生器包括两个辅助放大器，其中一个辅助放大器在其饱和区域中工作，另一个在其非饱和区域中工作。功率放大器和两个辅助放大器具有相同的失真特性并接收相同的输入信号。在其饱和区域工作的辅助放大器引入失真，并且在其非饱和区域中工作的辅助放大器不引入失真。由辅助放大器提供的两个信号被组合以产生具有作为功率放大器失真的近似副本的失真分量的误差信号。

76. 发明授权

US06496064B2 Intermodulation product cancellation circuit 有权
标题翻译：互调产品消除电路
公开(公告)号：US06496064B2
公开(公告)日：2002-12-17
申请号：US09886939
申请日：2001-06-21
申请人： Eugene Rzyski
发明人： Eugene Rzyski
IPC分类号： H03F126
CPC分类号： H03F1/3223
摘要： A cancellation circuit is provided for canceling undesirable intermodulation (IM) products in electrical circuitry. The IM cancellation circuit includes a stepping spectrum analyzer which recognizes and measures the frequencies and amplitudes of different signal components of an RF signal across a desired frequency band. This information is forwarded to a processor which contains look-up tables or the like which provides information relating to the frequencies and/or amplitudes of signal components which are intended to reside in the RF signal. By comparison of the look-up tables to the frequencies and amplitudes measured and recognized by the sweeping spectrum analyzer, the processor of the cancellation circuit is able to determine whether the signal components in the RF signal are intended “information” carrying signals or unintended IM products. Where the processor has determined that a signal component is an unintended IM product, the processor controls a variable voltage controlled oscillator and variable amplifier to create a cancellation signal having an identical frequency and amplitude as the frequency and amplitude of the IM product. A phase shifter is provided to shift the phase of the cancellation signal 180 degrees with respect to the IM product and the cancellation signal is combined with the RF signal to produce an output signal having the IM product canceled.
摘要翻译：提供消除电路以消除电路中的不需要的互调（IM）产物。 IM消除电路包括步进频谱分析仪，其识别并测量跨期望频带的RF信号的不同信号分量的频率和振幅。该信息被转发到包含查找表等的处理器，该查询表提供了与要驻留在RF信号中的信号分量的频率和/或幅度有关的信息。通过将扫描表与扫描频谱分析仪测量和识别的频率和幅度进行比较，消除电路的处理器能够确定RF信号中的信号分量是否意在携带信号的“信息”或意外的IM 产品。在处理器已经确定信号分量是非预期IM产品的情况下，处理器控制可变压控振荡器和可变放大器以产生具有与IM产品的频率和幅度相同的频率和幅度的消除信号。提供了一个移相器，用于将消除信号的相位相对于IM产品180度移位，并且消除信号与RF信号组合以产生具有取消IM产品的输出信号。

77. 发明授权

US06480465B1 AM transmitter having feed-forward correction to compensate for source impedance 失效
标题翻译： AM发射机具有前馈校正以补偿源阻抗
公开(公告)号：US06480465B1
公开(公告)日：2002-11-12
申请号：US09894604
申请日：2001-06-28
申请人： Ky Thoai Luu
发明人： Ky Thoai Luu
IPC分类号： H03F114
CPC分类号： H03F3/211 , H03F1/3223 , H03F3/24 , H04B1/0483 , H04B2001/0441
摘要： An AM transmitter having feed forward correction to compensate for source impedance. A power supply source provides a DC operating voltage. N RF amplifiers are provided for amplifying an input signal. The amplifiers are connected to the power supply source. Each amplifier has an output circuit that, when the associated amplifier is on, supplies energy from the source to provide an output voltage at a load. Each the amplifier output circuit exhibits a source impedance that degrades the value of the output voltage. A source impedance corrector varies the value of the input signal prior to amplification by the amplifiers to compensate for any variations in the value of the output voltage caused by the source impedances.
摘要翻译：具有前馈校正以补偿源阻抗的AM发射机。电源提供直流工作电压。提供N个RF放大器用于放大输入信号。放大器连接到电源。每个放大器具有输出电路，当相关的放大器接通时，从源提供能量以在负载处提供输出电压。每个放大器输出电路都显示出一个降低输出电压值的源阻抗。源阻抗校正器在放大器之前改变输入信号的值，以补偿源阻抗引起的输出电压值的任何变化。

78. 发明申请

US20020084847A1 Digital linearizer of high power amplifier and digital linearizing method 失效
标题翻译：数字线性化大功率放大器和数字线性化方法
公开(公告)号：US20020084847A1
公开(公告)日：2002-07-04
申请号：US10025887
申请日：2001-12-26
申请人： LG ELECTRONICS INC.
发明人： Woo Sik Kim , Dae Weon Kim
IPC分类号： H03F001/26
CPC分类号： H03F1/3229 , H03F1/3223 , H03F3/24 , H04B2001/0441
摘要： According to a digital linearizing method, a digital input signal on a first path is operated with an output signal of a main amplifying unit, to thus detect distortion components included in the output signal of the main amplifying unit. A digital input signal on a second path is correlated with the detected distortion components, to thus adaptively control a gain of the digital input signal on the second path during the detection of the distortion components. Therefore, according to the above method, it is possible to effectively and correctly remove the distortion components included in the output signal of the main amplifying unit by amplifying the detected distortion components and coupling the amplified distortion components with the output signal of the main amplifying unit.
摘要翻译：根据数字线性化方法，利用主放大单元的输出信号对第一路径上的数字输入信号进行操作，从而检测包括在主放大单元的输出信号中的失真分量。第二路径上的数字输入信号与检测到的失真分量相关，从而在检测到失真分量期间自适应地控制第二路径上的数字输入信号的增益。因此，根据上述方法，通过放大检测到的失真成分，并将放大后的失真成分与主放大部的输出信号进行耦合，能够有效且正确地除去主放大部的输出信号所包含的失真成分。

79. 发明授权

US6091296A Single loop feedforward amplifier for use in an RF transmitter and method of operation 失效
标题翻译：用于射频发射机的单环前馈放大器及其操作方法
公开(公告)号：US6091296A
公开(公告)日：2000-07-18
申请号：US134194
申请日：1998-08-14
申请人： Peter S. Rha
发明人： Peter S. Rha
IPC分类号： H04B1/04 , H03F1/32
CPC分类号： H03F1/3276 , H03F1/3223 , H03F2201/3212 , Y02B60/50
摘要： There is disclosed, for use in a wireless network, a single-loop feedforward amplification system. The single loop comprises a main amplification branch and a feedforward branch in parallel to the main amplification branch. The main amplification branch contains a delay line that receives and delays the initial low-power input signal, and a power amplifier that amplifies the delayed input signal to produce an amplified output signal. The feedforward branch also receives the input signal and generates an distortion correction signal to compensate for the distortion produced at the output of the power amplifier due to its non-linearity. The distortion correction signal and the distorted amplified output signal are then combined to create a corrected amplified output signal without distortion.
摘要翻译：公开了用于无线网络中的单环前馈放大系统。单个回路包括与主放大支路并联的主放大支路和前馈支路。主放大分支包含延迟线，其接收并延迟初始低功率输入信号，以及放大延迟的输入信号以产生放大的输出信号的功率放大器。前馈分支还接收输入信号并产生失真校正信号以补偿由于其非线性而在功率放大器的输出处产生的失真。然后将失真校正信号和失真的放大输出信号组合以产生没有失真的经校正的放大输出信号。

80. 发明授权

US5933766A Intermodulation compensation in multi-channel amplifiers 失效
标题翻译：多通道放大器中的互调补偿
公开(公告)号：US5933766A
公开(公告)日：1999-08-03
申请号：US764877
申请日：1996-12-16
申请人： Paul W. Dent
发明人： Paul W. Dent
IPC分类号： H01Q3/26 , H03F1/32 , H03F3/68 , H04B7/15 , H04J1/12 , H04B17/00
CPC分类号： H03F1/3223
摘要： A multi-channel transmit amplifier array comprising a multiplicity N of coupled power amplifier elements is disclosed. The number of channels provided for amplifying desired signals for transmission is less than N, by at least one. In this case, the unused channel is used to inject an intermodulation compensation waveform specifically tailored to reduce intermodulation generated in all of the other N-1 signal paths. Instantaneous complex waveform values for the intermodulation compensation waveform may be systematically computed from the instantaneous complex values of the N-1 desired signals in such a way as to minimize the greatest signal amplitude in any of the N signal paths.
摘要翻译：公开了一种包括耦合功率放大器元件的多个N的多通道发射放大器阵列。提供用于放大所需传输信号的信道数目小于N，至少为1。在这种情况下，未使用的信道用于注入专门用于减少在所有其它N-1信号路径中产生的互调的互调补偿波形。用于互调补偿波形的瞬时复波形值可以以N-1个期望信号的瞬时复数值以这样一种方式从N个信号路径中的任何一个中最小化最大信号幅度的方式被系统计算。

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