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公开(公告)号：US20070139106A1
公开(公告)日：2007-06-21
申请号：US11294742
申请日：2005-12-06
申请人： Timothy Dittmer , George Cabrera
发明人： Timothy Dittmer , George Cabrera
IPC分类号： H03F3/68
CPC分类号： H03F3/24 , H03F1/0288 , H03F2200/255
摘要： Systems and methods are provided for efficient amplification of a signal utilizing a modified Doherty amplifier system. A modified Doherty amplifier system includes a nonlinear main amplifier and a nonlinear auxiliary amplifier. An impedance-inverting network separates the main amplifier from an associated load. A second quarter wave transmission line separates the auxiliary amplifier from an associated signal source. The signal source has an associated minimum signal power, such that the signal power never drops below a predetermined percentage of a peak signal power.
摘要翻译： 提供了系统和方法，用于利用改进的Doherty放大器系统来有效地放大信号。 改进的Doherty放大器系统包括非线性主放大器和非线性辅助放大器。 阻抗反相网络将主放大器与相关负载分开。 第二个四分之一波长的传输线将辅助放大器与相关的信号源分开。 信号源具有相关联的最小信号功率，使得信号功率不会降低到峰值信号功率的预定百分比以下。
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公开(公告)号：US20070243836A1
公开(公告)日：2007-10-18
申请号：US11403304
申请日：2006-04-13
CPC分类号： H04B1/0483
摘要： Systems and methods are provided for generating dual outputs in a digital exciter system. A first signal path produces one of a frequency modulated audio signal, a digital information signal, and a signal comprising both frequency modulated audio and digital information. A second signal path produces one of a frequency modulated audio signal, a digital information signal, and a signal comprising both frequency modulated audio and digital information. A main exciter output provides one of the signal produced at the first signal path and the signal produced at the second signal path to an associated first signal destination. An auxiliary exciter output provides one of the signal produced at the first signal path and the signal produced at the auxiliary signal path to an associated second signal destination
摘要翻译： 提供了用于在数字激励器系统中产生双输出的系统和方法。 第一信号路径产生频率调制音频信号，数字信息信号和包括调频音频和数字信息的信号之一。 第二信号路径产生频率调制音频信号，数字信息信号和包括调频音频和数字信息的信号之一。 主激励器输出提供在第一信号路径处产生的信号和在第二信号路径处产生的信号到相关联的第一信号目的地之一。 辅助激励器输出提供在第一信号路径处产生的信号和在辅助信号路径处产生的信号到相关联的第二信号目的地之一
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公开(公告)号：US06646504B2
公开(公告)日：2003-11-11
申请号：US09932813
申请日：2001-08-17
IPC分类号： H03B345
摘要： An RF wideband amplifier system is provided that includes an M way splitter for receiving an RF input signal and splitting same into M RF signals for respective application to M power amplifier modules PAM-1 to PAM-M that amplify the M signals and apply the amplified M signals to an M way combiner that applies an amplified RF signal to a load. A main controller provides an automatic level control reference signal, representative of the desired output power level of each of the power amplifier modules. Each power amplifier module includes an 2*N way balanced splitter that receives one of the M RF signals and splits the signal into 2*N signal portions; 2*N RF amplifiers that respectively receive the 2*N signal portions and amplify same and provide therefrom 2*N amplified signal portions; an 2*N way RF combiner that receives and combines the amplified RF signal portions and provides therefrom a combined amplified output RF signal; a power detector that provides a power signal representative of the level of the output power of the power amplifier module; a difference circuit that provides an attenuation control signal having a value in accordance with the difference in values of the power signal and the reference signal; and, a variable adjuster that adjusts the magnitude of the one of the M RF signals in accordance with the difference.
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公开(公告)号：US06590472B2
公开(公告)日：2003-07-08
申请号：US09932390
申请日：2001-08-17
IPC分类号： H01P518
CPC分类号： H01P5/187
摘要： A directional coupler comprises a coupler circuit board which is mounted substantially perpendicular to the surface of a parent circuit board. First and second upper traces are disposed on the opposing surfaces of the coupler circuit board. The coupling between the upper electrically conductive traces determines the odd mode impedance of the coupler. First and second lower traces are also disposed on opposing surfaces and connected to ground. The upper and lower traces are arranged such that the even mode of the impedance is determined by the coupling between the first upper trace and the second lower trace and the coupling between the second upper trace and the first lower trace.
摘要翻译： 定向耦合器包括基本上垂直于母电路板的表面安装的耦合器电路板。 第一和第二上部迹线设置在耦合器电路板的相对表面上。 上导电迹线之间的耦合决定耦合器的奇模阻抗。 第一和第二下部迹线也设置在相对的表面上并连接到地面。 上和下迹线被布置成使得阻抗的均匀模式由第一上迹线和第二下迹线之间的耦合以及第二上迹线和第一下迹线之间的耦合来确定。
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5.发明授权公开(公告)号：US06515545B1
公开(公告)日：2003-02-04
申请号：US09932422
申请日：2001-08-17
申请人： Zhiqun Hu , Dmitriy Borodulin , George Cabrera , Timothy Dittmer , Gavin Monson , Paul Moore
发明人： Zhiqun Hu , Dmitriy Borodulin , George Cabrera , Timothy Dittmer , Gavin Monson , Paul Moore
IPC分类号： H03F368
摘要： A power amplifier system is presented for use in amplifying an RF input signal comprising N sub-power amplifiers are connected together in parallel with each receiving and amplifying a portion of the RF input signal. A combiner combines the amplified portions of the RF input signal to provide a combined output signal. Each sub-amplifier includes at least one transistor having an input port that receives a DC bias voltage and an output port, such that when the RF input signal is not present a quiescent current flows through the output port. A controller is operative when the RF signal is not present to check and adjust the magnitude of the quiescent current flowing in each of the sub-amplifier output ports in the sequence of 1 . . . N.
摘要翻译： 提供功率放大器系统，用于放大RF输入信号，其中N个子功率放大器与每个接收和放大RF输入信号的一部分并联连接在一起。 组合器组合RF输入信号的放大部分以提供组合的输出信号。 每个子放大器包括至少一个晶体管，其具有接收DC偏置电压的输入端口和输出端口，使得当RF输入信号不存在时，静态电流流过输出端口。 当RF信号不存在时，控制器可操作，以按照1的顺序检查和调整在每个子放大器输出端口中流动的静态电流的大小。 。 。 N.
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公开(公告)号：US20070139107A1
公开(公告)日：2007-06-21
申请号：US11305649
申请日：2005-12-16
申请人： Timothy Dittmer
发明人： Timothy Dittmer
IPC分类号： H03G3/20
CPC分类号： H03G3/3042 , H03F1/0222 , H03F1/3247 , H03F2200/102 , H03G3/004
摘要： Systems and methods are provided for amplifying a composite input signal, comprising a drive signal and an envelope signal, at a power amplifier. A secondary modulation, representing a portion of the composite input signal falling outside of a frequency band associated with the envelope signal, is produced for the drive signal. The secondary modulation is applied to the drive signal. The drive signal is amplified at the power amplifier to produce an amplified signal. At least a portion of the envelope signal is employed to drive a supply terminal of the power amplifier.
摘要翻译： 系统和方法被提供用于在功率放大器处放大包括驱动信号和包络信号的复合输入信号。 对于驱动信号产生表示复合输入信号的落在与包络信号相关的频带之外的部分的二次调制。 二次调制被应用于驱动信号。 驱动信号在功率放大器被放大以产生放大的信号。 使用包络信号的至少一部分来驱动功率放大器的供电端子。
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公开(公告)号：US20060291584A1
公开(公告)日：2006-12-28
申请号：US11168705
申请日：2005-06-28
申请人： Timothy Dittmer
发明人： Timothy Dittmer
CPC分类号： H04B1/66
摘要： Systems and methods are provided for providing a hybrid signal having a reduced crest factor. An analog exciter generates an analog signal having an associated phase. A digital exciter generates a digital signal that assumes one of a plurality of vector states at discrete sampling times associated with the hybrid signal. Each of the plurality of vector states has an associated phase. The digital signal and the analog signal are combined to provide the hybrid signal. The hybrid signal is compressed maximally when the digital signal assumes a vector state that is in phase with the analog signal.
摘要翻译： 提供了用于提供具有降低的波峰因数的混合信号的系统和方法。 模拟激励器产生具有相关相位的模拟信号。 数字激励器产生在与混合信号相关联的离散采样时间处于多个矢量状态中的一个的数字信号。 多个矢量状态中的每一个具有相关联的相位。 数字信号和模拟信号被组合以提供混合信号。 当数字信号呈现与模拟信号同相的矢量状态时，混合信号被最大化地压缩。
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