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WO2000027038A3 - Radio frequency transmitters - Google Patents

Radio frequency transmitters Download PDF

Info

Publication number
WO2000027038A3
WO2000027038A3 PCT/EP1999/008111 EP9908111W WO0027038A3 WO 2000027038 A3 WO2000027038 A3 WO 2000027038A3 EP 9908111 W EP9908111 W EP 9908111W WO 0027038 A3 WO0027038 A3 WO 0027038A3
Authority
WO
WIPO (PCT)
Prior art keywords
radio frequency
frequency transmitters
amplifier
data
linear mode
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/EP1999/008111
Other languages
French (fr)
Other versions
WO2000027038A2 (en
Inventor
Robert Owen Bristow
Alexander Colin Wilson
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson 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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to BR9914912-5A priority Critical patent/BR9914912A/en
Priority to EEP200100190A priority patent/EE200100190A/en
Priority to EP99968328A priority patent/EP1125367A2/en
Priority to AU25369/00A priority patent/AU2536900A/en
Publication of WO2000027038A2 publication Critical patent/WO2000027038A2/en
Publication of WO2000027038A3 publication Critical patent/WO2000027038A3/en
Anticipated expiration legal-status Critical
Ceased 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
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H03F3/245—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages with semiconductor devices only
    • 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
    • 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
    • H03F1/0261—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the polarisation voltage or current, e.g. gliding Class A
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/18—Indexing scheme relating to amplifiers the bias of the gate of a FET being controlled by a control signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/045—Circuits with power amplifiers with means for improving efficiency

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transmitters (AREA)
  • Amplifiers (AREA)

Abstract

There is disclosed a method of controlling a radio frequency power amplifier (1) in a digital communications device. The linearity of the amplifier (1) is adjusted such that during transmission of data from the device the amplifier operates in a non-linear mode, and before and after transmission of data from the device the amplifier operates in a linear mode.
PCT/EP1999/008111 1998-10-30 1999-10-27 Radio frequency transmitters Ceased WO2000027038A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BR9914912-5A BR9914912A (en) 1998-10-30 1999-10-27 Method of controlling a radio frequency power amplifier in a digital communications device, and, radio frequency transmitter for a digital communications device
EEP200100190A EE200100190A (en) 1998-10-30 1999-10-27 Radio frequency transmitters
EP99968328A EP1125367A2 (en) 1998-10-30 1999-10-27 Radio frequency transmitters
AU25369/00A AU2536900A (en) 1998-10-30 1999-10-27 Radio frequency transmitters

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9823821.5 1998-10-30
GB9823821A GB2343312A (en) 1998-10-30 1998-10-30 GSM mobile telephone transmitter with amplifier used in an efficient non-linear mode during data transmission and in a linear mode during ramp-up or ramp-down

Publications (2)

Publication Number Publication Date
WO2000027038A2 WO2000027038A2 (en) 2000-05-11
WO2000027038A3 true WO2000027038A3 (en) 2000-08-10

Family

ID=10841601

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/008111 Ceased WO2000027038A2 (en) 1998-10-30 1999-10-27 Radio frequency transmitters

Country Status (7)

Country Link
EP (1) EP1125367A2 (en)
CN (1) CN1331864A (en)
AU (1) AU2536900A (en)
BR (1) BR9914912A (en)
EE (1) EE200100190A (en)
GB (1) GB2343312A (en)
WO (1) WO2000027038A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0107264D0 (en) * 2001-03-22 2001-05-16 Nokia Networks Oy Processing signals in a transmitter
JP4791271B2 (en) 2006-06-28 2011-10-12 富士通株式会社 Amplifier control device
JP7537667B2 (en) * 2020-01-30 2024-08-21 国立研究開発法人宇宙航空研究開発機構 Amplification equipment, transmission and reception systems

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5060294A (en) * 1990-07-05 1991-10-22 Motorola, Inc. Dual mode power amplifier for radiotelephone
US5281925A (en) * 1992-11-17 1994-01-25 Acrodyne Industries, Inc. RF amplifier providing reduced drive response rise times and fall times

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5420536A (en) * 1993-03-16 1995-05-30 Victoria University Of Technology Linearized power amplifier
US5638404A (en) * 1994-09-22 1997-06-10 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Communications Pre-compensated frequency modulation (PFM)

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5060294A (en) * 1990-07-05 1991-10-22 Motorola, Inc. Dual mode power amplifier for radiotelephone
US5281925A (en) * 1992-11-17 1994-01-25 Acrodyne Industries, Inc. RF amplifier providing reduced drive response rise times and fall times

Also Published As

Publication number Publication date
BR9914912A (en) 2001-07-10
GB9823821D0 (en) 1998-12-23
EE200100190A (en) 2002-06-17
AU2536900A (en) 2000-05-22
EP1125367A2 (en) 2001-08-22
GB2343312A (en) 2000-05-03
CN1331864A (en) 2002-01-16
WO2000027038A2 (en) 2000-05-11

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