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BR9914912A - Method of controlling a radio frequency power amplifier in a digital communications device, and, radio frequency transmitter for a digital communications device - Google Patents

Method of controlling a radio frequency power amplifier in a digital communications device, and, radio frequency transmitter for a digital communications device

Info

Publication number
BR9914912A
BR9914912A BR9914912-5A BR9914912A BR9914912A BR 9914912 A BR9914912 A BR 9914912A BR 9914912 A BR9914912 A BR 9914912A BR 9914912 A BR9914912 A BR 9914912A
Authority
BR
Brazil
Prior art keywords
radio frequency
communications device
digital communications
power amplifier
controlling
Prior art date
Application number
BR9914912-5A
Other languages
Portuguese (pt)
Inventor
Robert Owen Bristow
Alexander Colin Wilson
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of BR9914912A publication Critical patent/BR9914912A/en

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

"MéTODO DE CONTROLE DE UM AMPLIFICADOR DE POTêNCIA DE RADIOFREQUêNCIA EM UM DISPOSITIVO DE COMUNICAçõES DIGITAL, E, TRANSMISSOR DE RADIOFREQUêNCIA PARA UM DISPOSITIVO DE COMUNICAçõES DIGITAL" é divulgado um método de controle de um amplificador de potência (1) de radiofrequência em um dispositivo de comunicações digital. A linearidade do amplificador (1) é ajustada de modo que, durante a transmissão de dados do dispositivo, o amplificador opera em um modo não linear e antes e após a transmissão de dados do dispositivo, o amplificador opera em um modo linear."METHOD OF CONTROL OF A RADIO FREQUENCY POWER AMPLIFIER IN A DIGITAL COMMUNICATION DEVICE, AND, RADIO FREQUENCY TRANSMITTER FOR A DIGITAL COMMUNICATION DEVICE" a method of controlling a power amplifier (1) of a radio frequency device is disclosed digital communications. The linearity of the amplifier (1) is adjusted so that, during data transmission from the device, the amplifier operates in a non-linear mode and before and after data transmission from the device, the amplifier operates in a linear mode.

BR9914912-5A 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 BR9914912A (en)

Applications Claiming Priority (2)

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

Publications (1)

Publication Number Publication Date
BR9914912A true BR9914912A (en) 2001-07-10

Family

ID=10841601

Family Applications (1)

Application Number Title Priority Date Filing Date
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

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

Family Cites Families (4)

* 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
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)

Also Published As

Publication number Publication date
CN1331864A (en) 2002-01-16
GB2343312A (en) 2000-05-03
AU2536900A (en) 2000-05-22
EE200100190A (en) 2002-06-17
GB9823821D0 (en) 1998-12-23
WO2000027038A3 (en) 2000-08-10
EP1125367A2 (en) 2001-08-22
WO2000027038A2 (en) 2000-05-11

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Legal Events

Date Code Title Description
B08F Application fees: dismissal - article 86 of industrial property law

Free format text: REFERENTE A 4A, 5A, 6A, 7A E 8A ANUIDADES.

B08K Lapse as no evidence of payment of the annual fee has been furnished to inpi (acc. art. 87)

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 1913 DE 04/09/2007.