SE0004791L - Linear power amplifier unit - Google Patents

Linear power amplifier unit

Info

Publication number
SE0004791L
SE0004791L SE0004791A SE0004791A SE0004791L SE 0004791 L SE0004791 L SE 0004791L SE 0004791 A SE0004791 A SE 0004791A SE 0004791 A SE0004791 A SE 0004791A SE 0004791 L SE0004791 L SE 0004791L
Authority
SE
Sweden
Prior art keywords
power amplifier
amplifier unit
cancellation loop
dcl
loop
Prior art date
Application number
SE0004791A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE0004791D0 (en
Inventor
Mark Briffa
Original Assignee
Allgon Ab
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 Allgon Ab filed Critical Allgon Ab
Priority to SE0004791A priority Critical patent/SE0004791L/en
Publication of SE0004791D0 publication Critical patent/SE0004791D0/en
Priority to PCT/SE2001/002846 priority patent/WO2002052719A1/en
Publication of SE0004791L publication Critical patent/SE0004791L/en

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
    • H03F1/3223—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
    • H03F1/3235—Modifications of amplifiers to reduce non-linear distortion using feed-forward using a loop for error extraction and another loop for error subtraction using a pilot signal

Abstract

Feed-forward linearized power amplifier unit comprising a signal cancellation loop (SCL) and a distortion cancellation loop (DCL), each loop comprising an amplifying branch and a time delay branch, respectively, wherein the power amplifier unit is provided with an input and an output. A measurement output is arranged at the output of the first summation point of the SCL, adapted to be used when performing a distortion cancellation loop (DCL) test step, and that a remotely controllable switch is arranged in the time delay branch of the signal cancellation loop, adapted to be opened when performing a distortion cancellation loop (DCL) test step. The invention also comprises a method in a power amplifier unit.
SE0004791A 2000-12-22 2000-12-22 Linear power amplifier unit SE0004791L (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE0004791A SE0004791L (en) 2000-12-22 2000-12-22 Linear power amplifier unit
PCT/SE2001/002846 WO2002052719A1 (en) 2000-12-22 2001-12-20 Linearized power amplifier unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0004791A SE0004791L (en) 2000-12-22 2000-12-22 Linear power amplifier unit

Publications (2)

Publication Number Publication Date
SE0004791D0 SE0004791D0 (en) 2000-12-22
SE0004791L true SE0004791L (en) 2002-06-23

Family

ID=20282371

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0004791A SE0004791L (en) 2000-12-22 2000-12-22 Linear power amplifier unit

Country Status (2)

Country Link
SE (1) SE0004791L (en)
WO (1) WO2002052719A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5610554A (en) * 1994-07-28 1997-03-11 Aval Communications Inc. Cancellation loop, for a feed-forward amplifier, employing an adaptive controller
US5485120A (en) * 1994-07-28 1996-01-16 Aval Communications Inc. Feed-forward power amplifier system with adaptive control and control method
EP0762630A1 (en) * 1995-09-08 1997-03-12 AT&T IPM Corp. Low distortion amplifier circuit with improved output power
KR100259849B1 (en) * 1997-12-26 2000-06-15 윤종용 A method of feed forward linear power amplification using pilot tone hopping
US6208207B1 (en) * 1999-05-05 2001-03-27 Simon Fraser University Adaptive linearizer for RF power amplifiers

Also Published As

Publication number Publication date
WO2002052719A1 (en) 2002-07-04
SE0004791D0 (en) 2000-12-22

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Legal Events

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