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公开(公告)号：US06522196B1
公开(公告)日：2003-02-18
申请号：US09931734
申请日：2001-08-20
申请人： Peter John Poggi , George Cabrera , Paul Moore
发明人： Peter John Poggi , George Cabrera , Paul Moore
IPC分类号： H03F360
CPC分类号： H03F3/602 , H03F3/60 , H03F2200/198
摘要： A system and method for improving the input return loss in RF amplifiers is disclosed. One embodiment of the present invention amplifies only one of the two output quadrature signals of 3 dB coupler in an amplifier module while substantially maintaining a constant impedance at the input to the 3 dB coupler. This removes one of the design constraints for designing the input network for an amplifier module thereby allowing for more flexible amplifier designs and ease of cascading amplifier modules. One embodiment of the present invention improves the input return loss of an RF amplifier pallet in a cascaded-stage power amplifier circuit for a television transmitter including a 3 dB coupler by replacing one of the two amplifiers connected to the output of the 3 dB coupler with an electrical circuit of substantially equivalent impedance to the input impedance of the non-replaced amplifier.
摘要翻译： 公开了一种改善RF放大器输入回波损耗的系统和方法。 本发明的一个实施例在放大器模块中仅放大3dB耦合器的两个输出正交信号中的一个，同时在3dB耦合器的输入处基本保持恒定的阻抗。 这消除了设计用于放大器模块的输入网络的设计约束之一，从而允许更灵活的放大器设计和容易的级联放大器模块。 本发明的一个实施例通过将连接到3dB耦合器的输出的两个放大器中的一个放置在具有3dB耦合器的电视发射机的级联功率放大器电路中来改善RF放大器托盘的输入回波损耗， 与未替换的放大器的输入阻抗基本上相等的阻抗的电路。
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公开(公告)号：US06683496B2
公开(公告)日：2004-01-27
申请号：US09931737
申请日：2001-08-20
申请人： Peter John Poggi , Tim Dittmer , George Cabrera
发明人： Peter John Poggi , Tim Dittmer , George Cabrera
IPC分类号： H03G516
CPC分类号： H03G3/3042 , H03F1/0222 , H03F1/0233 , H03F1/0244 , H03F1/0277 , H03F3/211 , H03G3/004 , H03G2201/103 , H03G2201/504 , H03G2201/508 , H03G2201/702
摘要： The variable power supply to an amplifier in an electrical circuit is dynamically controlled through the use of a lookup table responsive to one or more operating conditions of the electrical circuit. The lookup table is indexed by one or more of the operating conditions and the amount of amplification to be applied to an input signal to the amplifier is determined. One embodiment of the invention comprises a television transmitter circuit including a power amplifier circuit capable of amplifying a variable frequency COFDM or 8VSB input signal where the amount of amplification applied to the input signal is dynamically controlled through the use of a lookup table as a function of the frequency of the input signal.
摘要翻译： 通过使用响应于电路的一个或多个操作条件的查找表来动态地控制电路中的放大器的可变电源。 查找表由一个或多个操作条件索引，并确定要施加到放大器的输入信号的放大量。 本发明的一个实施例包括一种电视发射机电路，其包括能够放大可变频率COFDM或8VSB输入信号的功率放大器电路，其中通过使用查找表作为函数来动态地控制施加到输入信号的放大量 输入信号的频率。
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3.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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4.发明申请BROADBAND HIGH EFFICIENCY AMPLIFIER SYSTEM AND A METHOD OF CONSTRUCTING HIGH POWER AMPLITUDE MODULATED RF SIGNAL 有权宽带高效放大器系统和构建高功率放大器调制RF信号的方法公开(公告)号：US20150303875A1
公开(公告)日：2015-10-22
申请号：US13565119
申请日：2012-08-02
申请人： Dmitri Borodulin , George Cabrera
发明人： Dmitri Borodulin , George Cabrera
CPC分类号： H03F1/0205 , H03F1/3247 , H03F1/56 , H03F3/189 , H03F3/19 , H03F3/211 , H03F3/245 , H03F3/602 , H03F2200/222 , H03F2200/387 , H03F2200/451 , H03F2201/3212 , H03F2201/3227 , H03F2203/21106 , H03F2203/21142
摘要： A broadband high efficiency (RF) radio frequency amplifier architecture is disclosed. Systems and methods are provided for generating an amplified radio frequency (RF) signal representing a baseband input signal. First, second, and third signal paths are configured to amplify first, second, and third intermediate signals to provide respective amplified signals. A signal combiner assembly is configured to combine the amplified signals to produce the compound amplified RF signal. The signals are combined such that a first amplified signal modulates a load impedance at respective outputs of an active device associated with the plurality of amplifiers in the second signal path, and one of the first amplified signal, the second amplified signal, and a sum of the first and second amplified signals modulates a load impedance of an active device associated with the plurality of amplifiers in the third signal path.
摘要翻译： 公开了一种宽带高效（RF）射频放大器架构。 提供了用于产生表示基带输入信号的放大射频（RF）信号的系统和方法。 第一，第二和第三信号路径被配置为放大第一，第二和第三中间信号以提供相应的放大信号。 信号组合器组件被配置为组合放大的信号以产生化合物放大的RF信号。 信号被组合，使得第一放大信号调制与第二信号路径中与多个放大器相关联的有源器件的相应输出处的负载阻抗，以及第一放大信号，第二放大信号之和和 第一和第二放大信号调制与第三信号路径中的多个放大器相关联的有源器件的负载阻抗。
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公开(公告)号：US20110193624A1
公开(公告)日：2011-08-11
申请号：US12701932
申请日：2010-02-08
IPC分类号： H03F3/68
CPC分类号： H03F1/0288 , H01P5/04 , H03F1/56 , H03F3/602 , H03F2200/387 , H03F2200/423 , H03F2200/451 , H03F2200/543
摘要： A tunable impedance inverter is presented for a Doherty amplifier circuit having first and second amplifiers connected in parallel between an input circuit for receiving an input signal and an output circuit for supplying an output signal to a load. An impedance inverter is coupled between the first amplifier and the output circuit. The inverter has an input and an output and a tunable mechanical strip line of variable electrical length interposed between the input and the output. An adjuster adjusts the electrical length of the strip line. The adjuster adjustably varies the electrical length of said pathway to thereby adjust the center frequency of said output signal.
摘要翻译： 为Doherty放大器电路提供了一种可调阻抗逆变器，该电路具有第一和第二放大器并联连接在用于接收输入信号的输入电路和用于向负载提供输出信号的输出电路之间。 阻抗反相器耦合在第一放大器和输出电路之间。 变频器具有插入在输入和输出之间的可变电长度的输入和输出以及可调谐的机械带状线。 调节器调节带状线的电气长度。 调节器可调整地改变所述路径的电气长度，从而调节所述输出信号的中心频率。
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公开(公告)号：US07248110B2
公开(公告)日：2007-07-24
申请号：US11294742
申请日：2005-12-06
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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8.发明申请Transmitting RF signals employing improved high-level combinations of analog FM and digital signals 有权使用改进的模拟FM和数字信号的高级组合来发射RF信号公开(公告)号：US20050190851A1
公开(公告)日：2005-09-01
申请号：US10788710
申请日：2004-02-27
申请人： George Cabrera
发明人： George Cabrera
CPC分类号： H04B1/0483 , H04B1/406
摘要： Apparatus and method are presented for broadcasting an RF signal comprised of analog FM and digital signals. An analog FM source provides an analog FM signal. A digital source provides a digital signal. A splitter splits the FM signal into a fractional portion and remainder portion. A summer combines the fractional portion with the digital signal to provide a first combined signal. A main FM transmitter amplifies the remainder portion to provide an amplified FM signal. A digital transmitter amplifies the first combined signal to provide an amplified combined signal. A combiner combines the amplified FM signal and the amplified combined signal to provide a composite RF signal to be broadcasted.
摘要翻译： 提供了用于广播由模拟FM和数字信号组成的RF信号的装置和方法。 模拟FM信号源提供模拟FM信号。 数字信号源提供数字信号。 分流器将FM信号分成小数部分和余数部分。 夏天将小数部分与数字信号相结合，以提供第一组合信号。 主FM发射机放大剩余部分以提供放大的FM信号。 数字发射机放大第一组合信号以提供放大的组合信号。 组合器组合放大的FM信号和放大的组合信号，以提供要广播的复合RF信号。
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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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