[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

BR9914912A - 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 - Google Patents

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

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
English (en)
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/pt

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.
BR9914912-5A 1998-10-30 1999-10-27 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 BR9914912A (pt)

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 (pt) 2001-07-10

Family

ID=10841601

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9914912-5A BR9914912A (pt) 1998-10-30 1999-10-27 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

Country Status (7)

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

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 (ja) 2006-06-28 2011-10-12 富士通株式会社 増幅器制御装置
JP7537667B2 (ja) * 2020-01-30 2024-08-21 国立研究開発法人宇宙航空研究開発機構 増幅装置、送受信システム

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

Similar Documents

Publication Publication Date Title
GB2345398B (en) Wireless communication apparatus with transmission power controller and method thereof
AU3171999A (en) Radio communication device and method of controlling transmission rate
MY125314A (en) "power control in a cdma mobile communication system"
EP2202922A3 (en) Apparatus and an associated method for facilitating communications in a radio communication system that provides for data communications at multiple data rates
CA2181046A1 (en) Apparatus for energy conservation in a communication system
FI943889A (fi) Menetelmä lähetystehon säätämiseksi solukkoradiojärjestelmässä ja vastaanotin
ZA973577B (en) System and method for recuding interference generated by a cdma communications device
BR0006799A (pt) Amplificador de potência multimodo eficiente e método de amplificar um sinal modulado
DK0550540T3 (da) Variabel højttalerdæmpning baseret på modtagne data
FI961414A0 (fi) Menetelmä ja laite tehon ohjaamiseksi tietoliikennejärjestelmässä
MY133553A (en) Method and apparatus for controlling signal power in a communication system
AU1344401A (en) Method and apparatus for efficient data transmission control in a wireless voice-over-data communication system
AU2002355307A1 (en) Method for determining whether to perform link adaptation in wcdma communications
EP1239602A3 (en) Transmission power control apparatus, transmission power control method, and mobile station
BR0105443A (pt) Método de adaptação de taxa de dados com base nas condições do canal em um sistema de comunicações sem fio
AU2001273409A1 (en) Multi-state power control mechanism for a wireless communication system
IT1277866B1 (it) Apparecchio e procedimento per minimizzare il tempo di accensione di un ricevitore operante in modo discontinuo.
EP1286480A3 (de) Verfahren und Funk-Kommunikationssystem zur Leistungsregelung zwischen einer Basisstation und einer Teilnehmerstation
GB9929984D0 (en) Transmission power control in radio communication
GB2263596A (en) Transition generating between on and off states of a radio frequency transmitter
AU2003263164A1 (en) Method for controlling a data transmission in a radiocommunication system with a hierarchical network architecture
BR9914912A (pt) 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
BR0107156A (pt) Aparelho de estação de base e método de comunicação
NO933034L (no) Fremgangsmaate og anordning for aa styre en radiosender
EP1315304A3 (de) Empfangsschaltung zum Empfang von Nachrichtensignalen

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.