WO2003017478A3 - Feed forward compensation circuit - Google Patents

Feed forward compensation circuit Download PDF

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Publication number
WO2003017478A3
WO2003017478A3 PCT/CA2002/001254 CA0201254W WO03017478A3 WO 2003017478 A3 WO2003017478 A3 WO 2003017478A3 CA 0201254 W CA0201254 W CA 0201254W WO 03017478 A3 WO03017478 A3 WO 03017478A3
Authority
WO
WIPO (PCT)
Prior art keywords
feed forward
compensation circuit
forward compensation
loop
active components
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.)
Ceased
Application number
PCT/CA2002/001254
Other languages
French (fr)
Other versions
WO2003017478A2 (en
Inventor
Calin Moldoveanu
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.)
Redline Communications Inc
Original Assignee
Redline Communications Inc
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 Redline Communications Inc filed Critical Redline Communications Inc
Priority to EP02754031A priority Critical patent/EP1425848A2/en
Priority to AU2002322892A priority patent/AU2002322892A1/en
Publication of WO2003017478A2 publication Critical patent/WO2003017478A2/en
Anticipated expiration legal-status Critical
Publication of WO2003017478A3 publication Critical patent/WO2003017478A3/en
Ceased legal-status Critical Current

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

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

A feed forward compensation circuit for a radio frequency power amplifier includes a nulling loop and a compensation loop. The nulling loop includes active components that provide feedback to the amplitude and phase adjusters. This feedback compensates for component drift and ensures stable operation. In a preferred embodiment the active components include operational amplifiers that compare input and output signals to determine when adjustments are needed.
PCT/CA2002/001254 2001-08-14 2002-08-13 Feed forward compensation circuit Ceased WO2003017478A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP02754031A EP1425848A2 (en) 2001-08-14 2002-08-13 Feed forward compensation circuit
AU2002322892A AU2002322892A1 (en) 2001-08-14 2002-08-13 Feed forward compensation circuit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US31202601P 2001-08-14 2001-08-14
US60/312,026 2001-08-14

Publications (2)

Publication Number Publication Date
WO2003017478A2 WO2003017478A2 (en) 2003-02-27
WO2003017478A3 true WO2003017478A3 (en) 2004-02-19

Family

ID=23209543

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2002/001254 Ceased WO2003017478A2 (en) 2001-08-14 2002-08-13 Feed forward compensation circuit

Country Status (3)

Country Link
EP (1) EP1425848A2 (en)
AU (1) AU2002322892A1 (en)
WO (1) WO2003017478A2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5148117A (en) * 1991-11-25 1992-09-15 American Nucleonics Corporation Adaptive feed-forward method and apparatus for amplifier noise reduction
US5528196A (en) * 1995-01-06 1996-06-18 Spectrian, Inc. Linear RF amplifier having reduced intermodulation distortion

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5148117A (en) * 1991-11-25 1992-09-15 American Nucleonics Corporation Adaptive feed-forward method and apparatus for amplifier noise reduction
US5528196A (en) * 1995-01-06 1996-06-18 Spectrian, Inc. Linear RF amplifier having reduced intermodulation distortion

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EID E E ET AL: "ADAPTIVE NULLING LOOP CONTROL FOR 1.7-GHZ FEEDFORWARD LINEARIZATIONSYSTEMS", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, IEEE INC. NEW YORK, US, vol. 45, no. 1, 1997, pages 83 - 86, XP000642638, ISSN: 0018-9480 *

Also Published As

Publication number Publication date
EP1425848A2 (en) 2004-06-09
WO2003017478A2 (en) 2003-02-27
AU2002322892A1 (en) 2003-03-03

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