BR9910772A - Circuito, processo de operar um circuito amplificador de potência, e, dispositivo de comunicação - Google Patents

Circuito, processo de operar um circuito amplificador de potência, e, dispositivo de comunicação

Info

Publication number
BR9910772A
BR9910772A BR9910772-4A BR9910772A BR9910772A BR 9910772 A BR9910772 A BR 9910772A BR 9910772 A BR9910772 A BR 9910772A BR 9910772 A BR9910772 A BR 9910772A
Authority
BR
Brazil
Prior art keywords
power amplifier
circuit
operating
communication device
values
Prior art date
Application number
BR9910772-4A
Other languages
English (en)
Inventor
Anders Khullar
Lars Gunnar Torbjoern Grahm
Karl Hokan Torbjoern Gordenfors
Sven Hans Sebastian Sedvallson
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 BR9910772A publication Critical patent/BR9910772A/pt

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
    • H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
    • H03G3/3047—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers for intermittent signals, e.g. burst signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/30—Delta-sigma modulation
    • H03M3/50—Digital/analogue converters using delta-sigma modulation as an intermediate step
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3002—Conversion to or from differential modulation
    • H03M7/3004—Digital delta-sigma modulation
    • H03M7/3015—Structural details of digital delta-sigma modulators

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Amplifiers (AREA)
  • Transmitters (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

"CIRCUITO, PROCESSO DE OPERAR UM CIRCUITO AMPLIFICADOR DE POTêNCIA, E, DISPOSITIVO DE COMUNICAçãO" A fim de aumentar a resolução da entrada de sinais em um amplificador de potência, este sistema inclui um circuito de controle de potência que utiliza valores modulados em delta sigma, que são armazenados em um dispositivo de memória. Estes valores, após recuperação de uma memória endereçável, são supridos somente a um filtro passa baixo antes de serem enviados para a entrada de controle do amplificador de potência. O uso dos valores modulados em delta sigma podem resultar em uma redução de hardware dentro do circuito de controle de potência dos dispositivos de comunicação e aumenta a resolução do sinal ao mover os elementos de ruído do sinal.
BR9910772-4A 1998-05-29 1999-05-27 Circuito, processo de operar um circuito amplificador de potência, e, dispositivo de comunicação BR9910772A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/086,565 US6097251A (en) 1998-05-29 1998-05-29 Pre-recorded sigma delta values for power amplifier control
PCT/SE1999/000906 WO1999063660A1 (en) 1998-05-29 1999-05-27 Pre-recorded sigma delta values for power amplifier control

Publications (1)

Publication Number Publication Date
BR9910772A true BR9910772A (pt) 2001-02-13

Family

ID=22199412

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9910772-4A BR9910772A (pt) 1998-05-29 1999-05-27 Circuito, processo de operar um circuito amplificador de potência, e, dispositivo de comunicação

Country Status (10)

Country Link
US (1) US6097251A (pt)
EP (1) EP1082811B1 (pt)
CN (1) CN1197239C (pt)
AT (1) ATE228730T1 (pt)
AU (1) AU4664799A (pt)
BR (1) BR9910772A (pt)
DE (1) DE69904169T2 (pt)
EE (1) EE200000692A (pt)
HK (1) HK1040007B (pt)
WO (1) WO1999063660A1 (pt)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6327462B1 (en) 1998-12-29 2001-12-04 Conexant Systems, Inc. System and method for dynamically varying operational parameters of an amplifier
US6377784B2 (en) * 1999-02-09 2002-04-23 Tropian, Inc. High-efficiency modulation RF amplifier
US7245018B1 (en) * 1999-06-22 2007-07-17 Semiconductor Energy Laboratory Co., Ltd. Wiring material, semiconductor device provided with a wiring using the wiring material and method of manufacturing thereof
US6597925B1 (en) * 2000-03-16 2003-07-22 Agere Systems Inc. Transmitter circuit with frequency self-optimization
US6552614B1 (en) * 2000-11-08 2003-04-22 Texas Instruments Incorporated Broadband cable modem amplifier with programmable bias current
US7248628B2 (en) * 2001-03-02 2007-07-24 Shaeffer Derek K Method and apparatus for a programmable filter
US6515605B2 (en) * 2001-04-30 2003-02-04 Texas Instruments Incorporated Base station having high speed, high resolution, digital-to-analog converter with off-line sigma delta conversion and storage
US6518902B2 (en) * 2001-04-30 2003-02-11 Texas Instruments Incorporated PC card and WLAN system having high speed, high resolution, digital-to analog converter with off-line sigma delta conversion and storage
US6489908B2 (en) * 2001-04-30 2002-12-03 Texas Instruments Incorporated Wireless local loop terminal and system having high speed, high resolution, digital-to-analog converter with off-line sigma-delta conversion and storage
GB2402006B (en) * 2003-05-23 2005-08-10 Motorola Inc Analog to digital converter
KR100604823B1 (ko) * 2003-07-11 2006-07-26 삼성전자주식회사 Ｇｓｍ과 ｇｐｒｓ 송신기의 전력 램핑 제어기 및 그 제어방법
EP1508967A1 (en) * 2004-05-28 2005-02-23 Siemens Aktiengesellschaft A power amplifier module and a mobile terminal
US7768353B2 (en) * 2008-06-13 2010-08-03 Samsung Electro-Mechanics Company, Ltd. Systems and methods for switching mode power amplifier control
US8325073B2 (en) * 2010-11-30 2012-12-04 Qualcomm Incorporated Performing enhanced sigma-delta modulation

Family Cites Families (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4270027A (en) * 1979-11-28 1981-05-26 International Telephone And Telegraph Corporation Telephone subscriber line unit with sigma-delta digital to analog converter
GB8826918D0 (en) * 1988-11-17 1988-12-21 Motorola Inc Power amplifier for radio frequency signal
JPH07105724B2 (ja) * 1989-07-14 1995-11-13 ヤマハ株式会社 ディジタル・アナログ変換回路
JP3012888B2 (ja) * 1989-11-24 2000-02-28 日本テキサス・インスツルメンツ株式会社 信号変調装置
GB2247793A (en) * 1990-09-06 1992-03-11 Motorola Inc Control of pulse power amplifier rise and fall
JPH07118652B2 (ja) * 1990-10-12 1995-12-18 ヤマハ株式会社 Ｄａ変換装置
US5057840A (en) * 1990-12-26 1991-10-15 Motorola, Inc. Σ-Δmodulator for digital-to-analog converter
JP2800500B2 (ja) * 1991-10-01 1998-09-21 松下電器産業株式会社 バースト送信出力制御回路
GB9105064D0 (en) * 1991-03-11 1991-04-24 Philips Electronic Associated Power amplifier and transmitting apparatus including such a power amplifier
JP2547902B2 (ja) * 1991-03-29 1996-10-30 株式会社東芝 シグマデルタ型ｄ／ａ変換器システム
US5159283A (en) * 1991-08-26 1992-10-27 Motorola, Inc. Power amplifier
JPH0590853A (ja) * 1991-09-27 1993-04-09 Nec Corp 電力増幅回路
DE69312425T2 (de) * 1992-11-09 1998-02-12 Philips Electronics Nv Digital-/Analogwandler
US5349353A (en) * 1992-12-28 1994-09-20 Zrilic Djuro G Method and apparatus for mixed analog and digital processing of delta modulated pulse streams including digital-to-analog conversion of a digital input signal
US5323157A (en) * 1993-01-15 1994-06-21 Motorola, Inc. Sigma-delta digital-to-analog converter with reduced noise
JP2966226B2 (ja) * 1993-02-17 1999-10-25 三菱電機株式会社 電力増幅器自動制御回路
EP0631395B1 (fr) * 1993-06-28 1999-03-24 CSEM Centre Suisse d'Electronique et de Microtechnique SA Circuit de traitement de signaux comportant un étage d'entrée à gain variable
GB2281461A (en) * 1993-08-27 1995-03-01 Nokia Telecommunications Oy Control of output power in radio transmitters using look-up table
US5712635A (en) * 1993-09-13 1998-01-27 Analog Devices Inc Digital to analog conversion using nonuniform sample rates
WO1995008221A1 (en) * 1993-09-13 1995-03-23 Analog Devices, Inc. Digital to analog conversion using nonuniform sample rates
US5565930A (en) * 1993-10-26 1996-10-15 Samsung Electronics Co., Ltd. Receiver with oversampling analog-to-digital conversion for digital signals accompanied by analog TV signals
US5524285A (en) * 1993-11-02 1996-06-04 Wray; Anthony J. Radio transmitter with power amplifier and linearization
US5754591A (en) * 1994-08-03 1998-05-19 Broadcom Corporation System for, and method of, processing quadrature amplitude modulated signals
JP3469326B2 (ja) * 1994-08-16 2003-11-25 バー−ブラウン・コーポレーション デジタル−アナログ変換器
KR0141938B1 (ko) * 1994-12-03 1998-07-15 문정환 델타 시그마 디지탈/아날로그 변환기
US5621172A (en) * 1995-04-03 1997-04-15 State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Oregon State University Method and apparatus for testing material strengths
FI98020C (fi) * 1995-06-06 1997-03-25 Nokia Mobile Phones Ltd Digitaalisen signaalin modulointimenetelmä ja modulaattori
US5592165A (en) * 1995-08-15 1997-01-07 Sigmatel, Inc. Method and apparatus for an oversampled digital to analog convertor
US5748126A (en) * 1996-03-08 1998-05-05 S3 Incorporated Sigma-delta digital-to-analog conversion system and process through reconstruction and resampling

Also Published As

Publication number Publication date
EP1082811B1 (en) 2002-11-27
EP1082811A1 (en) 2001-03-14
DE69904169T2 (de) 2003-06-12
US6097251A (en) 2000-08-01
CN1197239C (zh) 2005-04-13
HK1040007B (zh) 2005-11-25
ATE228730T1 (de) 2002-12-15
WO1999063660A1 (en) 1999-12-09
AU4664799A (en) 1999-12-20
CN1309832A (zh) 2001-08-22
EE200000692A (et) 2002-04-15
HK1040007A1 (en) 2002-05-17
DE69904169D1 (de) 2003-01-09

Similar Documents

Publication Publication Date Title
BR9910772A (pt) Circuito, processo de operar um circuito amplificador de potência, e, dispositivo de comunicação
IL138517A (en) System and method for transmission-line termination by signal cancellation, and applications thereof
WO2001097560A3 (en) Portable audio devices
BR9815314A (pt) Transdutor para transformação de séries de dados sintáticos
EP0797210A3 (en) Output buffer circuit
TW350171B (en) Amplification circuit and the apparatus
CA2220393A1 (en) Data transmission system with a low peak-to-average power ratio based on distorting small amplitude signals
SE0000699D0 (sv) Krets och förfarande för dämpning av brus i en dataomvandlare
WO2002056558A3 (en) Active filter circuit with dynamically modifiable internal gain
CA2241972A1 (en) Method and arrangement of signal tracking and a rake-receiver utilizing said arrangement
DE69324861D1 (de) Übermittlung von Steuerinformationen zwischen Geräten über einen seriellen Bus
ATE336870T1 (de) Kommunikationsendgerätevorrichtung zum senden von gemeinschaftskanalinformationen basierend auf dem zuweisungsstatus
MXPA04004152A (es) Dispositivo de audio digital.
KR950030144A (ko) 에이브이시스템의 오디오/비디오연결장치
SE9503545D0 (sv) Förafrande vid telefonsystem
SE9602679L (sv) Förfarande och arrangemang för att styra driftsmoden i en abonnentlinjekrets
RU96124373A (ru) Устройство модуляции для пейджингового передатчика (варианты)
AU2110300A (en) Method for securing access to a data processing device and appropriate device
EP1265185A3 (en) Parallel signal procesing circuit, semiconductor device having the circuit, and signal processing system having the circuit
WO2001065385A3 (en) Electronic equipment communications system and repeater
KR910010927A (ko) 카폰의 고주파 출력 자동 제어 회로
KR960001616A (ko) 전자레인지의 이상소음 방지장치
KR960009550B1 (en) 2 frequency signal control circuit & method for telephone
ATE332035T1 (de) Digitaler filterbaustein
KR960043530A (ko) 고주파신호 분배장치

Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 8A E 9A ANUIDADES.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO PUBLICADO NA RPI 1990 DE 25/02/2009.