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1.发明申请
公开(公告)号：WO03017471A3
公开(公告)日：2003-07-10
申请号：PCT/US0225443
申请日：2002-08-12
Applicant: HARRIS CORP
Inventor： POGGI PETER JOHN , CABRERA GEORGE , MOORE PAUL
IPC: H03F3/60
CPC classification number: H03F3/602 , H03F3/60 , H03F2200/198
Abstract: A system and method for improving the input return loss in RF amplifiers is disclosed. One embodiment of the present invention amplifies only one (0°) of the two (0° and 90°) output quadrature signals of 3 dB coupler (310) in an amplifier module while substantially maintaining a constant impedance at the input to the 3 dB coupler (310). 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.
Abstract translation: 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仅在放大器模块中放大3dB耦合器（310）的两个（0°和90°）输出正交信号中的一个（0°），同时在输入端基本保持恒定的阻抗为3dB 耦合器（310）。 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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Patent Agency Ranking2.发明申请
公开(公告)号：WO03017468A3
公开(公告)日：2003-08-21
申请号：PCT/US0225349
申请日：2002-08-12
Applicant: HARRIS CORP
Inventor： POGGI PETER JOHN , DITTMER TIMOTHY , CABRERA GEORGE
CPC classification number: H03G3/3042 , H03F1/0222 , H03F1/0233 , H03F1/0244 , H03F1/0277 , H03F3/211 , H03G3/004 , H03G2201/103 , H03G2201/504 , H03G2201/508 , H03G2201/702
Abstract: The variable power supply (12) to an amplifier (10) in an electrical circuit is dynamically controlled through the use of a lookup table (14) 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 (11) 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.
Abstract translation: 通过使用响应于电路的一个或多个操作条件的查找表（14）来动态地控制到电路中的放大器（10）的可变电源（12）。 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（11）的功率放大器电路，其中通过使用查找表作为输入信号的放大量被动态地控制 输入信号的频率的函数。
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3.发明公开
公开(公告)号：EP1436892A4
公开(公告)日：2005-01-19
申请号：EP02768489
申请日：2002-08-12
Applicant: HARRIS CORP
Inventor： POGGI PETER JOHN , CABRERA GEORGE , MOORE PAUL
CPC classification number: H03F3/602 , H03F3/60 , H03F2200/198
Abstract: A system and method for improving the input return loss in RF amplifiers is disclosed. One embodiment of the present invention amplifies only one (0°) of the two (0° and 90°) output quadrature signals of 3 dB coupler (310) in an amplifier module while substantially maintaining a constant impedance at the input to the 3 dB coupler (310). 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.
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公开(公告)号：EP1428313A4
公开(公告)日：2006-06-07
申请号：EP02759314
申请日：2002-08-12
Applicant: HARRIS CORP
Inventor： POGGI PETER JOHN , DITTMER TIMOTHY , CABRERA GEORGE
CPC classification number: H03G3/3042 , H03F1/0222 , H03F1/0233 , H03F1/0244 , H03F1/0277 , H03F3/211 , H03G3/004 , H03G2201/103 , H03G2201/504 , H03G2201/508 , H03G2201/702
Abstract: The variable power supply (12) to an amplifier (10) in an electrical circuit is dynamically controlled through the use of a lookup table (14) 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 (11) 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.
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公开(公告)号：DE60237019D1
公开(公告)日：2010-08-26
申请号：DE60237019
申请日：2002-08-12
Applicant: HARRIS CORP
Inventor： POGGI PETER JOHN , DITTMER TIMOTHY , CABRERA GEORGE
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公开(公告)号：AU2002324657A1
公开(公告)日：2003-03-03
申请号：AU2002324657
申请日：2002-08-12
Applicant: HARRIS CORP
Inventor： CABRERA GEORGE , DITTMER TIMOTHY , POGGI PETER JOHN
Abstract: 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.
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