DE69716935T2 - Adaptive digitale vorwärtsgekoppelte Korrektur für HF Leistungsverstärker - Google Patents

Adaptive digitale vorwärtsgekoppelte Korrektur für HF Leistungsverstärker

Info

Publication number
DE69716935T2
DE69716935T2 DE69716935T DE69716935T DE69716935T2 DE 69716935 T2 DE69716935 T2 DE 69716935T2 DE 69716935 T DE69716935 T DE 69716935T DE 69716935 T DE69716935 T DE 69716935T DE 69716935 T2 DE69716935 T2 DE 69716935T2
Authority
DE
Germany
Prior art keywords
power amplifiers
adaptive digital
feedforward correction
digital feedforward
correction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE69716935T
Other languages
English (en)
Other versions
DE69716935D1 (de
Inventor
A Proctor
Todd Mucenieks
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Powerwave Technologies Inc
Original Assignee
SPECTRIAN SUNNYVALE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SPECTRIAN SUNNYVALE filed Critical SPECTRIAN SUNNYVALE
Publication of DE69716935D1 publication Critical patent/DE69716935D1/de
Application granted granted Critical
Publication of DE69716935T2 publication Critical patent/DE69716935T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F1/00Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/26Modifications of amplifiers to reduce influence of noise generated by amplifying elements
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F1/00Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3223Modifications of amplifiers to reduce non-linear distortion using feed-forward
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F1/00Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3223Modifications of amplifiers to reduce non-linear distortion using feed-forward
    • H03F1/3229Modifications of amplifiers to reduce non-linear distortion using feed-forward using a loop for error extraction and another loop for error subtraction
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F1/00Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3241Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3247Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F2201/00Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
    • H03F2201/32Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
    • H03F2201/3233Adaptive predistortion using lookup table, e.g. memory, RAM, ROM, LUT, to generate the predistortion
DE69716935T 1996-09-20 1997-08-07 Adaptive digitale vorwärtsgekoppelte Korrektur für HF Leistungsverstärker Expired - Lifetime DE69716935T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/717,500 US5898338A (en) 1996-09-20 1996-09-20 Adaptive digital predistortion linearization and feed-forward correction of RF power amplifier
PCT/US1997/014003 WO1998012800A1 (en) 1996-09-20 1997-08-07 Adaptive digital predistortion linearization and feed-forward correction of rf power amplifier

Publications (2)

Publication Number Publication Date
DE69716935D1 DE69716935D1 (de) 2002-12-12
DE69716935T2 true DE69716935T2 (de) 2003-07-03

Family

ID=24882278

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69716935T Expired - Lifetime DE69716935T2 (de) 1996-09-20 1997-08-07 Adaptive digitale vorwärtsgekoppelte Korrektur für HF Leistungsverstärker

Country Status (6)

Country Link
US (2) US5898338A (de)
EP (1) EP0928515B1 (de)
JP (1) JP2001508954A (de)
KR (1) KR100338230B1 (de)
DE (1) DE69716935T2 (de)
WO (1) WO1998012800A1 (de)

Families Citing this family (116)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6549242B1 (en) * 1997-04-04 2003-04-15 Harris Corporation Combining adjacent TV channels for transmission by a common antenna
KR100251561B1 (ko) * 1997-06-19 2000-04-15 윤종용 디지털통신시스템의송신기선형화장치및방법
US6208686B1 (en) * 1997-07-18 2001-03-27 Innova Corporation System and method for dynamic amplitude adjustment of modulating signal in frequency modulated transceivers
FI105366B (fi) 1997-10-29 2000-07-31 Nokia Networks Oy Linearisointimenetelmä ja vahvistinjärjestely
US6215354B1 (en) * 1998-03-06 2001-04-10 Fujant, Inc. Closed loop calibration for an amplitude reconstruction amplifier
US6600792B2 (en) * 1998-06-26 2003-07-29 Qualcomm Incorporated Predistortion technique for high power amplifiers
JP3360029B2 (ja) * 1998-07-13 2002-12-24 松下電器産業株式会社 歪補償用アドレス発生器,歪補償回路および送信歪補償付き送信機
KR100279948B1 (ko) * 1998-07-21 2001-02-01 윤종용 선형화된 전력 증폭 장치 및 방법
US6075412A (en) * 1998-10-13 2000-06-13 Ophir Rf, Inc. Linearization for power amplifiers
US6188732B1 (en) * 1998-10-19 2001-02-13 Samsung Electronics Co., Ltd. Digital feedforward amplifier for use in an RF transmitter and method of operation
US6166601A (en) * 1999-01-07 2000-12-26 Wiseband Communications Ltd. Super-linear multi-carrier power amplifier
JP3185778B2 (ja) 1999-02-10 2001-07-11 日本電気株式会社 アクティブマトリクス型液晶表示装置、その製造方法及びその駆動方法
US6104239A (en) * 1999-03-12 2000-08-15 Thomcast Communications, Inc. Method for correcting frequency-varying nonlinear errors and digital correction circuit implementing same
JP4062816B2 (ja) * 1999-05-13 2008-03-19 株式会社デンソー 送信電力制御回路
GB2351624B (en) * 1999-06-30 2003-12-03 Wireless Systems Int Ltd Reducing distortion of signals
JP3892725B2 (ja) 1999-07-09 2007-03-14 ノキア コーポレイション 電力用デバイスのvgsドリフト及び熱補償のためのバイアス回路
US6587514B1 (en) * 1999-07-13 2003-07-01 Pmc-Sierra, Inc. Digital predistortion methods for wideband amplifiers
DE19933545A1 (de) * 1999-07-16 2001-02-08 Siemens Ag Anordnung zur Linearisierung einer Verstärkerschaltung
GB2352570B (en) 1999-07-28 2003-12-24 Wireless Systems Int Ltd Distortion reduction
KR100324123B1 (ko) * 1999-08-04 2002-02-20 남상욱 전력 증폭기의 사전 왜곡 선형화 방법 및 장치
US6693974B2 (en) * 1999-08-05 2004-02-17 Samsung Electronics Co., Ltd. Adaptive digital pre-distortion circuit using adjacent channel power profile and method of operation
DE19943957C1 (de) 1999-09-14 2001-04-12 Bosch Gmbh Robert Verfahren zur Linearisierung eines Hochfrequenz-Verstärkers
US6507732B1 (en) * 1999-09-14 2003-01-14 Lucent Technologies Inc. Dynamic path gain compensation for radios in wireless communication systems
JP2001111438A (ja) * 1999-10-13 2001-04-20 Nec Corp 送信機及びそれに用いる歪み補償方法
GB2372184B (en) * 1999-10-13 2003-03-12 Nec Corp Transmitter and distortion compensation method to be used therefor
WO2001029962A1 (en) * 1999-10-18 2001-04-26 Baskin Brian L Wideband vector feedback apparatus
US6246286B1 (en) * 1999-10-26 2001-06-12 Telefonaktiebolaget Lm Ericsson Adaptive linearization of power amplifiers
EP1104093A1 (de) * 1999-11-24 2001-05-30 Telefonaktiebolaget Lm Ericsson Verfahren und Vorrichtung zur Erzeugung eines hochfrequenten Signals
US6266517B1 (en) * 1999-12-30 2001-07-24 Motorola, Inc. Method and apparatus for correcting distortion in a transmitter
US6751447B1 (en) * 1999-12-30 2004-06-15 Samsung Electronics Cop., Ltd. Adaptive digital pre-distortion circuit using output reference signal and method of operation
US6628923B1 (en) 2000-05-03 2003-09-30 Nokia Networks Oy Adaptive phase and amplitude linearization method and apparatus
JP2002009557A (ja) * 2000-06-21 2002-01-11 Matsushita Electric Ind Co Ltd 線形補償増幅装置
JP4356201B2 (ja) * 2000-06-28 2009-11-04 ソニー株式会社 適応歪み補償装置
US6934341B2 (en) * 2000-08-29 2005-08-23 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for plurality signal generation
US6771710B1 (en) * 2000-10-17 2004-08-03 Northrop Grumman Corporation Partial frequency offset digital upconversion
DE10108101A1 (de) * 2001-02-20 2002-09-26 Bosch Gmbh Robert Sender zum Versenden von Signalen über Funkkanäle mit orthogonalen Frequenzmiliplex (OFDM) und Verfahren zum Senden von Signalen über Funkkanäle mit orthogonalen Frequenzmultiplex (OFDM)
US6928122B2 (en) * 2001-06-07 2005-08-09 Motorola, Inc. Amplifier predistortion system and method
GB2376613B (en) * 2001-06-15 2005-01-05 Wireless Systems Int Ltd Methods and apparatus for signal distortion correction
GB2376583B (en) * 2001-06-15 2005-01-05 Wireless Systems Int Ltd Time alignment of signals
GB2376584B (en) 2001-06-15 2005-02-16 Wireless Systems Int Ltd Signal correction techniques
DE10133332A1 (de) * 2001-07-10 2003-01-30 Fraunhofer Ges Forschung Vorverzerrungslinearisierungs-Vorrichtung und -Verfahren
SE520466C2 (sv) * 2001-11-12 2003-07-15 Ericsson Telefon Ab L M Metod och anordning vid en digital linjäriseringskoppling
US6700439B2 (en) 2002-04-11 2004-03-02 Andrew Corporation Zero-bias bypass switch
US6812786B2 (en) 2002-04-11 2004-11-02 Andrew Corporation Zero-bias bypass switching circuit using mismatched 90 degrees hybrid
US8472897B1 (en) 2006-12-22 2013-06-25 Dali Systems Co. Ltd. Power amplifier predistortion methods and apparatus
US6985704B2 (en) * 2002-05-01 2006-01-10 Dali Yang System and method for digital memorized predistortion for wireless communication
US8811917B2 (en) 2002-05-01 2014-08-19 Dali Systems Co. Ltd. Digital hybrid mode power amplifier system
US8380143B2 (en) 2002-05-01 2013-02-19 Dali Systems Co. Ltd Power amplifier time-delay invariant predistortion methods and apparatus
JP3502087B2 (ja) * 2002-05-14 2004-03-02 松下電器産業株式会社 ハイブリッド歪補償方法およびハイブリッド歪補償装置
US6680649B2 (en) 2002-06-07 2004-01-20 Telefonaktiebolaget Lm Ericsson (Publ) Coordinate rotation of pre-distortion vector in feedforward linearization amplification system
US7756421B2 (en) * 2002-10-03 2010-07-13 Ciena Corporation Electrical domain compensation of non-linear effects in an optical communications system
US6812791B2 (en) * 2002-10-14 2004-11-02 Raytheon Company Method and system for linearizing an amplified signal
US6937094B2 (en) * 2002-11-22 2005-08-30 Powerwave Technologies, Inc. Systems and methods of dynamic bias switching for radio frequency power amplifiers
US6812792B2 (en) * 2003-01-02 2004-11-02 Harris Corporation Precorrection of a nonlinear amplifier
US6985706B2 (en) * 2003-01-23 2006-01-10 Powerwave Technologies, Inc. Feed forward amplifier system employing self-generating alignment lists and adaptive controller
US7741341B2 (en) 2003-05-19 2010-06-22 Sanofi-Aventis Deutschland Gmbh Benzimidazole-derivatives as factor Xa inhibitors
US20040258176A1 (en) * 2003-06-19 2004-12-23 Harris Corporation Precorrection of nonlinear distortion with memory
US7062234B2 (en) 2003-07-28 2006-06-13 Andrew Corporation Pre-distortion cross-cancellation for linearizing power amplifiers
US7126421B2 (en) * 2003-09-23 2006-10-24 Powerwave Technologies, Inc. Method for aligning feed forward loops
US7023273B2 (en) * 2003-10-06 2006-04-04 Andrew Corporation Architecture and implementation methods of digital predistortion circuitry
US6963243B2 (en) * 2003-10-22 2005-11-08 Andrew Corporation Amplifier pre-distortion processing based on composite look-up tables
CN102064848B (zh) 2004-01-29 2012-07-25 桥扬科技有限公司 用于多小区宽带无线系统中的移动站和基站的方法和装置
US8009660B2 (en) 2004-01-29 2011-08-30 Neocific, Inc. Methods and apparatus using cell-specific and common pilot subcarriers in multi-carrier, multi-cell wireless communication networks
US7693032B2 (en) 2004-02-13 2010-04-06 Neocific, Inc. Methods and apparatus for multi-carrier communication systems with adaptive transmission and feedback
KR100804667B1 (ko) 2004-03-09 2008-02-20 포스데이타 주식회사 다중-반송파 통신 시스템에서의 랜덤 억세스 방법 및 장치
US7113036B2 (en) * 2004-04-15 2006-09-26 Agere Systems Inc. Method and apparatus for adaptive digital predistortion using nonlinear and feedback gain parameters
US8089911B2 (en) 2004-05-01 2012-01-03 Neocific, Inc. Methods and apparatus for cellular broadcasting and communication system
US7355470B2 (en) 2006-04-24 2008-04-08 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including embodiments for amplifier class transitioning
US7327803B2 (en) 2004-10-22 2008-02-05 Parkervision, Inc. Systems and methods for vector power amplification
US7756492B2 (en) * 2005-01-25 2010-07-13 Zte Corporation Predistortion device based on vector envelope injection and the method thereof
CN101189792B (zh) * 2005-03-09 2010-07-14 富士通株式会社 失真补偿装置
JP2006270638A (ja) * 2005-03-24 2006-10-05 Shimada Phys & Chem Ind Co Ltd 非線形歪み補償装置
EP1914885B1 (de) * 2005-06-30 2012-03-07 Fujitsu Ltd. Leistungsverstärker mit verzerrungskompensationsschaltung
EP1953913B1 (de) * 2005-09-28 2010-03-31 Fujitsu Ltd. Verzerrungskompensationseinrichtung
US8334722B2 (en) 2007-06-28 2012-12-18 Parkervision, Inc. Systems and methods of RF power transmission, modulation and amplification
US7911272B2 (en) 2007-06-19 2011-03-22 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including blended control embodiments
US7937106B2 (en) 2006-04-24 2011-05-03 ParkerVision, Inc, Systems and methods of RF power transmission, modulation, and amplification, including architectural embodiments of same
US8031804B2 (en) 2006-04-24 2011-10-04 Parkervision, Inc. Systems and methods of RF tower transmission, modulation, and amplification, including embodiments for compensating for waveform distortion
CN101479956B (zh) 2006-04-28 2013-07-31 大力系统有限公司 用于无线通信的高效率线性化功率放大器
DE102006031046A1 (de) * 2006-07-05 2008-01-10 Rohde & Schwarz Gmbh & Co. Kg Anordnung zum Bestimmen der Betriebkenngrößen eines Hochfrequenz-Leistungsverstärkers
US8315336B2 (en) 2007-05-18 2012-11-20 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including a switching stage embodiment
US8370113B2 (en) 2006-09-29 2013-02-05 Netlogic Microsystems, Inc. Low-power and low-cost adaptive self-linearization system with fast convergence
US8041757B2 (en) * 2006-09-29 2011-10-18 Netlogic Microsystems, Inc. Low power and low complexity adaptive self-linearization
US8032336B2 (en) * 2006-09-29 2011-10-04 Netlogic Microsystems, Inc. Distortion cancellation using adaptive linearization
CN102017553B (zh) * 2006-12-26 2014-10-15 大力系统有限公司 用于多信道宽带通信系统中的基带预失真线性化的方法和系统
US9026067B2 (en) 2007-04-23 2015-05-05 Dali Systems Co. Ltd. Remotely reconfigurable power amplifier system and method
KR101484796B1 (ko) * 2007-04-23 2015-01-20 달리 시스템즈 씨오. 엘티디. N-웨이 도허티 분산형 전력 증폭기
US8274332B2 (en) 2007-04-23 2012-09-25 Dali Systems Co. Ltd. N-way Doherty distributed power amplifier with power tracking
US8170819B2 (en) * 2007-04-26 2012-05-01 Qualcomm, Incorporated Systems and methods for measuring non-linear characteristics of a power amplifier
WO2008156800A1 (en) 2007-06-19 2008-12-24 Parkervision, Inc. Combiner-less multiple input single output (miso) amplification with blended control
US8224266B2 (en) * 2007-08-30 2012-07-17 Dali Systems Co., Ltd. Power amplifier predistortion methods and apparatus using envelope and phase detector
US8213884B2 (en) * 2007-12-07 2012-07-03 Dali System Co. Ltd. Baseband-derived RF digital predistortion
JP5571391B2 (ja) * 2008-01-30 2014-08-13 日本電気株式会社 半導体装置
WO2009145887A1 (en) 2008-05-27 2009-12-03 Parkervision, Inc. Systems and methods of rf power transmission, modulation, and amplification
CN101656512B (zh) * 2008-08-18 2012-06-27 富士通株式会社 功率放大器非线性程度度量装置、方法和预失真补偿装置
GB2463015A (en) * 2008-08-27 2010-03-03 Roke Manor Research An RF transmitter with distortion reduction by feedforward of a model-derived error signal
US8483631B2 (en) * 2008-09-10 2013-07-09 Qualcomm Incorporated Method and apparatus for predistorting a waveform for input to an amplifier
DE102008052172B4 (de) 2008-10-17 2014-01-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung zum Erzeugen eines Korrektursignals
KR101046350B1 (ko) 2008-10-30 2011-07-05 장세주 간섭억제시스템 필터모듈 기반 전치왜곡장치 및 적응형 피드포워드 선형화회로가 적용된 이동통신장치의 출력단
US8498591B1 (en) * 2009-08-21 2013-07-30 Marvell International Ltd. Digital Predistortion for nonlinear RF power amplifiers
US8699620B1 (en) 2010-04-16 2014-04-15 Marvell International Ltd. Digital Predistortion for nonlinear RF power amplifiers
JP5402817B2 (ja) * 2010-04-30 2014-01-29 富士通株式会社 電力増幅器のメモリ効果キャンセラ、無線送信機
KR102136940B1 (ko) 2010-09-14 2020-07-23 달리 시스템즈 씨오. 엘티디. 원격으로 재구성가능한 분산 안테나 시스템 및 방법
WO2012050838A1 (en) 2010-09-28 2012-04-19 Neocific, Inc. Methods and apparatus for flexible use of frequency bands
WO2012139126A1 (en) 2011-04-08 2012-10-11 Parkervision, Inc. Systems and methods of rf power transmission, modulation, and amplification
WO2012167111A2 (en) 2011-06-02 2012-12-06 Parkervision, Inc. Antenna control
US8548404B2 (en) 2011-09-30 2013-10-01 Scintera Networks, Inc. Linearization of power amplifiers through digital in-band predistortion followed by analog predistortion
US8629718B2 (en) * 2011-11-07 2014-01-14 Telefonaktiebolaget L M Ericsson (Publ) Signal splitting apparatus suitable for use in a power amplifier
US9160586B1 (en) 2013-07-24 2015-10-13 Marvell International Ltd. Method and apparatus for estimating and compensating for in-phase and quadrature (IQ) mismatch in a receiver of a wireless communication device
KR20160058855A (ko) 2013-09-17 2016-05-25 파커비전, 인크. 정보를 포함하는 시간의 함수를 렌더링하기 위한 방법, 장치 및 시스템
CN104320095B (zh) * 2014-10-23 2017-09-22 清华大学 一种降低数字预失真中adc采样速率的方法及装置
CN104515944B (zh) * 2014-12-18 2017-04-26 华中科技大学 一种基于pid反馈的预失真修正方法及led结温温度测量方法
US9509350B1 (en) * 2015-06-11 2016-11-29 Infineon Technologies Ag Devices and methods for adaptive crest factor reduction in dynamic predistortion
US10658982B1 (en) 2018-12-21 2020-05-19 Motorola Solutions, Inc. Dynamically linearizing multi-carrier power amplifiers
US10763791B2 (en) 2018-12-21 2020-09-01 Motorola Solutions, Inc. Selective linearization of scalable fault tolerant frequency agile transmitters
US11483018B1 (en) * 2021-06-04 2022-10-25 Xilinx, Inc. Reconfigurable and scalable nonlinear filter for digital pre-distorters

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4291277A (en) * 1979-05-16 1981-09-22 Harris Corporation Adaptive predistortion technique for linearizing a power amplifier for digital data systems
DE3221911C1 (de) * 1982-06-11 1983-11-17 Standard Elektrik Lorenz Ag, 7000 Stuttgart Hochfrequenzleistungsverstaerker mit einer Modulationseinrichtung
US4700151A (en) * 1985-03-20 1987-10-13 Nec Corporation Modulation system capable of improving a transmission system
FR2644638B1 (de) * 1989-03-14 1991-05-31 Labo Electronique Physique
US4943783A (en) * 1989-07-31 1990-07-24 Nippon Telegraph And Telephone Corporation Feed forward distortion correction circuit
US5485120A (en) * 1994-07-28 1996-01-16 Aval Communications Inc. Feed-forward power amplifier system with adaptive control and control method
US5486789A (en) * 1995-02-28 1996-01-23 Motorola, Inc. Apparatus and method for providing a baseband digital error signal in an adaptive predistorter
JP2967699B2 (ja) * 1995-03-06 1999-10-25 日本電気株式会社 送信装置
US5650758A (en) * 1995-11-28 1997-07-22 Radio Frequency Systems, Inc. Pipelined digital predistorter for a wideband amplifier

Also Published As

Publication number Publication date
JP2001508954A (ja) 2001-07-03
EP0928515A4 (de) 1999-12-01
EP0928515B1 (de) 2002-11-06
WO1998012800A1 (en) 1998-03-26
EP0928515A1 (de) 1999-07-14
US5949283A (en) 1999-09-07
DE69716935D1 (de) 2002-12-12
KR20000048479A (ko) 2000-07-25
KR100338230B1 (ko) 2002-05-27
US5898338A (en) 1999-04-27

Similar Documents

Publication Publication Date Title
DE69716935D1 (de) Adaptive digitale vorwärtsgekoppelte Korrektur für HF Leistungsverstärker
DE69736107D1 (de) Vorspannungseinstellung für leistungsverstärker
DE69714241T2 (de) Schaltung zur digitalen hf-interferenzunterdrückung
DE69736260D1 (de) Leistungsfaktorkorrekturschaltung
DK104397A (da) Digitalt høreapparat og dets høresanskompensationsbehandlingsmåde
AU2837097A (en) Stent fabrication method
AU2109797A (en) Adaptive neighbor cell list
DE69422543T2 (de) Verzerrungsarmer vorwärtsgeregelter Verstärker
EP0665630A3 (de) Leistungsfaktorkorrektur-Vorkompensierungsschaltung.
DE69703188T2 (de) Verzerrungskorrektionsschaltung
DE69939765D1 (de) Vorwärtskopplungsverstärker
DE69836330D1 (de) Adaptive digitale vorverzerrungsvorrichtung zur linearisierung eines leistungsverstärkers für digitalen rundfunk
DE69528546D1 (de) Breitbandiger Vorwärtskopplungsverstärker mit reduzierten Verzerrungen
DE69105587T2 (de) Vorverzerrungslinearisierer für Mikrowellenleistungsverstärker.
DE69713805D1 (de) Korrektur einer akustischen rückkopplung
DE69719207D1 (de) Steuerschaltung für hilfsstromversorgung
EP0777932A4 (de) Aktive vorspannung für hf-leistungsverstärker
DE69905099T2 (de) Vorwärtskopplungsverstärker
AU1313600A (en) Efficient solid-state high frequency power amplifier structure
DE69528280D1 (de) Ballastkontrolle für radiofrequenz-leistungstransistoren
AU5607198A (en) Interference rejection combining with frequency correction
FI19992411A (fi) Feedforward kompensaation tehovahvistinta varten
NL1007004A1 (nl) Foutcorrectiemethode en inrichting.
DE69726377D1 (de) Frequenzeinstellverfahren und -schaltung für digitalen Empfänger
DE69709879D1 (de) Verzögerungskorrekturschaltung

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: POWERWAVE TECHNOLOGIES, INC., SANTA ANA, CALIF., U