IT1173662B - Predistorsore attivo per la compensazione della linearita' - Google Patents

Predistorsore attivo per la compensazione della linearita'

Info

Publication number
IT1173662B
IT1173662B IT20437/83A IT2043783A IT1173662B IT 1173662 B IT1173662 B IT 1173662B IT 20437/83 A IT20437/83 A IT 20437/83A IT 2043783 A IT2043783 A IT 2043783A IT 1173662 B IT1173662 B IT 1173662B
Authority
IT
Italy
Prior art keywords
predistor
linearity
compensation
active
active predistor
Prior art date
Application number
IT20437/83A
Other languages
English (en)
Other versions
IT8320437A0 (it
IT8320437A1 (it
Inventor
George Walter Travis
Original Assignee
Western Electric Co
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 Western Electric Co filed Critical Western Electric Co
Publication of IT8320437A0 publication Critical patent/IT8320437A0/it
Publication of IT8320437A1 publication Critical patent/IT8320437A1/it
Application granted granted Critical
Publication of IT1173662B publication Critical patent/IT1173662B/it

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3252—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using multiple parallel paths between input and output
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3223—Modifications of amplifiers to reduce non-linear distortion using feed-forward
    • H03F1/3229—Modifications of amplifiers to reduce non-linear distortion using feed-forward using a loop for error extraction and another loop for error subtraction

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
IT20437/83A 1982-04-05 1983-04-01 Predistorsore attivo per la compensazione della linearita' IT1173662B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/365,313 US4453133A (en) 1982-04-05 1982-04-05 Active predistorter for linearity compensation

Publications (3)

Publication Number Publication Date
IT8320437A0 IT8320437A0 (it) 1983-04-01
IT8320437A1 IT8320437A1 (it) 1984-10-01
IT1173662B true IT1173662B (it) 1987-06-24

Family

ID=23438359

Family Applications (1)

Application Number Title Priority Date Filing Date
IT20437/83A IT1173662B (it) 1982-04-05 1983-04-01 Predistorsore attivo per la compensazione della linearita'

Country Status (8)

Country Link
US (1) US4453133A (it)
JP (1) JPS58186207A (it)
AU (1) AU1258483A (it)
CA (1) CA1191215A (it)
DE (1) DE3312030A1 (it)
FR (1) FR2524733A1 (it)
GB (1) GB2117991A (it)
IT (1) IT1173662B (it)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH662222A5 (de) * 1983-08-18 1987-09-15 Bbc Brown Boveri & Cie Verstaerkerschaltung.
IT1178599B (it) * 1984-10-31 1987-09-09 Gte Communication Syst Predistorcitore a tre vie a fondamentale soppressa
US4878030A (en) * 1987-10-23 1989-10-31 Ford Aerospace & Communications Corporation Linearizer for microwave amplifier
US4879519A (en) * 1988-10-31 1989-11-07 American Telephone And Telegraph Company, At&T Bell Labs Predistortion compensated linear amplifier
US4857865A (en) * 1988-11-10 1989-08-15 Hughes Aircraft Company Self equalizing multi-stage radio frequency power amplifier
FR2642917A1 (fr) * 1989-02-09 1990-08-10 Thomson Tubes Electroniques Circuit d'amplification hyperfrequence a distorsion reduite
GB2238196A (en) * 1989-11-16 1991-05-22 Motorola Inc Feed forward amplifier with pre-distortion
US4987378A (en) * 1989-11-28 1991-01-22 General Electric Company Feedforward predistortion linearizer
US5910965A (en) * 1995-06-30 1999-06-08 Harris Corporation Adaptive predistortion using over-the-hop feedback
US5740520A (en) * 1996-04-03 1998-04-14 State Of Israel Channel correction transceiver
DE19631388C2 (de) * 1996-06-19 1998-07-02 Fraunhofer Ges Forschung Verfahren zum Vorverzerren eines über eine nichtlineare Übertragungsstrecke zu übertragenden Signals und Schaltungsanordnung zum Durchführung des Verfahrens
WO1997049174A1 (de) 1996-06-19 1997-12-24 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorverzerrung für eine nichtlineare übertragungsstrecke im hochfrequenzbereich
US5850162A (en) * 1997-02-20 1998-12-15 Harris Corporation Linearization of an amplifier employing modified feedforward correction
US6046635A (en) * 1998-04-08 2000-04-04 Powerwave Technologies, Inc. Dynamic predistortion compensation for a power amplifier
US6493400B1 (en) 1999-04-19 2002-12-10 Bae Systems Aerospace Electronics Inc. Harmonic cancellation system
US6614854B1 (en) 1999-05-28 2003-09-02 Carriercomm, Inc. System and method for adaptive predistortion
US6242978B1 (en) * 1999-06-30 2001-06-05 Harris Corporation Method and apparatus for linearizing an amplifier
GB2356993A (en) * 1999-12-03 2001-06-06 Wireless Systems Int Ltd A pre-distortion arrangement for an amplifier in which a second substantially identical amplifier is used to produce distortion components
US6687466B1 (en) * 2000-01-06 2004-02-03 Adc Telecommunications, Inc. Dynamic distortion control
GB2358748A (en) * 2000-01-31 2001-08-01 Wireless Systems Int Ltd An arrangement in a predistortion or feedforward linearizer for an amplifier in which I and Q components are adjusted to achieve a desired phase and amplitude
EP1258080B1 (en) 2000-02-24 2003-07-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. System for reducing adjacent-channel interference by pre-linearization and pre-distortion
US6545535B2 (en) 2000-10-12 2003-04-08 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for reducing distortion
CA2359996A1 (en) 2000-11-03 2002-05-03 Telecommunications Research Laboratories Rf amplifier with feedback based linearization
JP2002290166A (ja) * 2001-03-28 2002-10-04 Hitachi Kokusai Electric Inc 増幅装置
US6600369B2 (en) 2001-12-07 2003-07-29 Motorola, Inc. Wideband linear amplifier with predistortion error correction
US6646505B2 (en) * 2002-03-26 2003-11-11 Motorola, Inc. Power amplifier array with same type predistortion amplifier
US8090051B2 (en) * 2008-04-29 2012-01-03 Motorola Solutions, Inc. Combined feedback and feed-forward linearization of radio frequency (RF) power amplifiers

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3471798A (en) * 1967-12-26 1969-10-07 Bell Telephone Labor Inc Feed-forward amplifier
US3732502A (en) * 1971-06-17 1973-05-08 Bell Telephone Labor Inc Distortion compensated electromagnetic wave circuits
US3755754A (en) * 1972-02-04 1973-08-28 Varian Associates Predistortion compensation for a microwave amplifier
US3725806A (en) * 1972-06-09 1973-04-03 Bell Telephone Labor Inc Distortion reduction in a repeatered transmission system
US3825843A (en) * 1973-06-08 1974-07-23 Bell Telephone Labor Inc Selective distortion compensation circuit
GB1495264A (en) * 1975-02-19 1977-12-14 Plessey Co Ltd Amplifier arrangements
FR2418981A1 (fr) * 1978-03-03 1979-09-28 Lignes Telegraph Telephon Circuit d'amplification pour telecommunication en hyperfrequence
US4276514A (en) * 1979-07-09 1981-06-30 Trw Inc. Wideband, phase compensated amplifier with negative feedback of distortion components in the output signal

Also Published As

Publication number Publication date
JPS58186207A (ja) 1983-10-31
GB2117991A (en) 1983-10-19
FR2524733A1 (fr) 1983-10-07
IT8320437A0 (it) 1983-04-01
CA1191215A (en) 1985-07-30
DE3312030A1 (de) 1983-10-06
US4453133A (en) 1984-06-05
AU1258483A (en) 1983-10-13
IT8320437A1 (it) 1984-10-01

Similar Documents

Publication Publication Date Title
IT1173662B (it) Predistorsore attivo per la compensazione della linearita'
NO850521L (no) Fremgangsmaate for fremstilling av farmakologisk aktive diestere
DK574685D0 (da) Aktive forbindelser
IT1142135B (it) Polietilenimmina impiegata per l'assorbimento di sostanze alfattivamente attive
NO162113C (no) Analogifremgangsmaate for fremstilling av terapeutisk aktive fenetanolaminforbindelser.
IT1200085B (it) Procedimento per la preparazione di xantoni e di tioxantoni
IT8547683A0 (it) Procedimento per la preparazione dicomposti 1,3-diossolan-4-metanolici otticamente attivi
NO171064C (no) Analogifremgangsmaate for fremstilling av aminoacyllabdaner
IT1110721B (it) Procedimento per incrementare la fluidita' della calce
NO163775C (no) Analogifremgangsmaate for fremstilling av terapeutisk aktive isoindolinyl-alkyl-piperaziner.
NO834729L (no) Fremgangsmaate for fremstilling av farmakologisk aktive tio-cefalosporiner
IT1197617B (it) Strumento per l'intubazione della cervice
DK290685A (da) Sammenklappeligt hjaelpemiddel for invalide
NO169126C (no) Fremgangsmaate for fremstilling av n-formyl-alfa-aspartyl-fenylalanin
GB8315433D0 (en) Optically active derivatives of n-arylates oxazolodine-2-ones
IT8567535A0 (it) Procedimento per la preparazione di amminoidrossicefamcarbossilati
FI832790A0 (fi) Regleringsanordning foer oeppningen i en ljusbaoge foer glassmaeltningsugn
IT1186146B (it) Circuito di correzione della linearita' orizzontale
NO162188C (no) Analogifremgangsmaate for fremstilling av terapeutisk aktive imidazokinoliner.
NO160712C (no) Analogifremgangsmaate for fremstilling av terapeutisk aktive benzotiazepin-forbindelser.
IT1173196B (it) Composti imidazopiridinici farmacologicamente attivi
LV5402A3 (lv) Kardioprotektors "Mildonats"
IT1149884B (it) Prozedimento per la preparazione della n-(2-tenoil)tiopropionil)-glicina
IT8421524A1 (it) "procedimento migliorato per la preparazione di 4-demetossi-daunorubicina"
IT1173199B (it) Composti imidazopiridinici farmacologicamente attivi