GB2313009A - Doherty-type amplifier and tuning method - Google Patents

Doherty-type amplifier and tuning method

Info

Publication number
GB2313009A
GB2313009A GB9713888A GB9713888A GB2313009A GB 2313009 A GB2313009 A GB 2313009A GB 9713888 A GB9713888 A GB 9713888A GB 9713888 A GB9713888 A GB 9713888A GB 2313009 A GB2313009 A GB 2313009A
Authority
GB
United Kingdom
Prior art keywords
amplifier
doherty
carrier
output signal
tuning method
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.)
Withdrawn
Application number
GB9713888A
Other versions
GB9713888D0 (en
Inventor
James Frank Long
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.)
Motorola Solutions Inc
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Publication of GB9713888D0 publication Critical patent/GB9713888D0/en
Publication of GB2313009A publication Critical patent/GB2313009A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/60—Amplifiers in which coupling networks have distributed constants, e.g. with waveguide resonators
    • H03F3/602—Combinations of several amplifiers
    • H03F3/604—Combinations of several amplifiers using FET's
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
    • 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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0288—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers using a main and one or several auxiliary peaking amplifiers whereby the load is connected to the main amplifier using an impedance inverter, e.g. Doherty amplifiers
    • 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

Abstract

An amplifier circuit comprising a carrier amplifier (24) producing a carrier amplifier output signal, a peaking amplifier (26) coupled to the carrier amplifier (24) in a Doherty configuration, and a combination circuit responsive to the carrier amplifier (24) and the peaking amplifier (26). The peaking amplifier (26) is voltage-biased to produce an adjusted intermodulation product signal. The combination circuit (35) combines the adjusted modulation product signal with the carrier amplifier output signal to produce a substantially linearized amplifier circuit output signal.
GB9713888A 1995-11-30 1996-09-04 Doherty-type amplifier and tuning method Withdrawn GB2313009A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56484595A 1995-11-30 1995-11-30
PCT/US1996/014269 WO1997020385A1 (en) 1995-11-30 1996-09-04 Doherty-type amplifier and tuning method

Publications (2)

Publication Number Publication Date
GB9713888D0 GB9713888D0 (en) 1997-09-03
GB2313009A true GB2313009A (en) 1997-11-12

Family

ID=24256136

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9713888A Withdrawn GB2313009A (en) 1995-11-30 1996-09-04 Doherty-type amplifier and tuning method

Country Status (10)

Country Link
JP (1) JPH10513631A (en)
KR (1) KR19980701804A (en)
AU (1) AU7154696A (en)
CA (1) CA2204409A1 (en)
DE (1) DE19681072T1 (en)
FI (1) FI972345A0 (en)
GB (1) GB2313009A (en)
SE (1) SE9701538L (en)
TW (1) TW322657B (en)
WO (1) WO1997020385A1 (en)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5786727A (en) * 1996-10-15 1998-07-28 Motorola, Inc. Multi-stage high efficiency linear power amplifier and method therefor
US6028485A (en) * 1998-08-03 2000-02-22 Motorola, Inc. Power amplification apparatus and method therefor
EP1041712B1 (en) * 1999-03-31 2009-01-28 NTT Mobile Communications Network Inc. Feedforward amplifier
US6320462B1 (en) * 2000-04-12 2001-11-20 Raytheon Company Amplifier circuit
SE516847C2 (en) * 2000-07-07 2002-03-12 Ericsson Telefon Ab L M Composite amplifier and transmitter including such amplifier
SE520760C2 (en) * 2000-06-06 2003-08-19 Ericsson Telefon Ab L M Doherty multistage amplifier
US6760230B2 (en) 2001-02-28 2004-07-06 Andrew Corporation Compact, high efficiency, high isolation power amplifier
US20020186079A1 (en) * 2001-06-08 2002-12-12 Kobayashi Kevin W. Asymmetrically biased high linearity balanced amplifier
US6917246B2 (en) * 2001-09-10 2005-07-12 Skyworks Solutions, Inc. Doherty bias circuit to dynamically compensate for process and environmental variations
JP2004221646A (en) 2003-01-09 2004-08-05 Nec Corp Doherty amplifier
JP2004222151A (en) 2003-01-17 2004-08-05 Nec Corp Doherty amplifier
US7038539B2 (en) * 2003-05-06 2006-05-02 Powerwave Technologies, Inc. RF amplifier employing active load linearization
US7710202B2 (en) 2003-09-17 2010-05-04 Nec Corporation Amplifier
WO2005029695A1 (en) * 2003-09-17 2005-03-31 Nec Corporation Amplifier
JP4520204B2 (en) 2004-04-14 2010-08-04 三菱電機株式会社 High frequency power amplifier
KR100654650B1 (en) * 2004-11-25 2006-12-08 아바고테크놀로지스코리아 주식회사 A series-type Doherty amplifier without hybrid coupler
US7180372B2 (en) * 2004-12-07 2007-02-20 Stmicroelectronics, Inc. High frequency amplifier
JP4700470B2 (en) * 2004-12-15 2011-06-15 株式会社日立国際電気 amplifier
US7193473B2 (en) * 2005-03-24 2007-03-20 Cree, Inc. High power Doherty amplifier using multi-stage modules
US7649412B2 (en) 2005-08-01 2010-01-19 Mitsubishi Electric Corporation High efficiency amplifier
JP4486620B2 (en) 2006-06-23 2010-06-23 株式会社エヌ・ティ・ティ・ドコモ Multiband Doherty amplifier
EP2383883B1 (en) * 2010-04-23 2013-07-17 Nxp B.V. Power amplifier
KR101255821B1 (en) * 2011-06-17 2013-04-24 주식회사 피플웍스 Doherty power amplifier being insert type
EP2698918A1 (en) * 2012-08-14 2014-02-19 Nxp B.V. Amplifier circuit
US9407214B2 (en) * 2013-06-28 2016-08-02 Cree, Inc. MMIC power amplifier
DE102013226635B4 (en) 2013-12-19 2023-07-06 Rohde & Schwarz GmbH & Co. Kommanditgesellschaft Doherty amplifier with additional delay element

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5420541A (en) * 1993-06-04 1995-05-30 Raytheon Company Microwave doherty amplifier
US5444418A (en) * 1994-07-29 1995-08-22 Motorola, Inc. Method and apparatus for feedforward power amplifying
JPH10137710A (en) * 1996-11-15 1998-05-26 Shibaura Eng Works Co Ltd Washing treatment device and its washing treatment

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01137710A (en) * 1987-11-24 1989-05-30 Sumitomo Electric Ind Ltd Wide band amplifier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5420541A (en) * 1993-06-04 1995-05-30 Raytheon Company Microwave doherty amplifier
US5444418A (en) * 1994-07-29 1995-08-22 Motorola, Inc. Method and apparatus for feedforward power amplifying
JPH10137710A (en) * 1996-11-15 1998-05-26 Shibaura Eng Works Co Ltd Washing treatment device and its washing treatment

Also Published As

Publication number Publication date
TW322657B (en) 1997-12-11
FI972345A (en) 1997-06-02
GB9713888D0 (en) 1997-09-03
DE19681072T1 (en) 1998-01-22
FI972345A0 (en) 1997-06-02
CA2204409A1 (en) 1997-05-31
KR19980701804A (en) 1998-06-25
JPH10513631A (en) 1998-12-22
AU7154696A (en) 1997-06-19
SE9701538D0 (en) 1997-04-24
WO1997020385A1 (en) 1997-06-05
SE9701538L (en) 1997-09-30

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)