ATE416510T1 - Einchip-leistungsverstärker und hüllkurvenmodulator - Google Patents

Einchip-leistungsverstärker und hüllkurvenmodulator

Info

Publication number
ATE416510T1
ATE416510T1 AT04803458T AT04803458T ATE416510T1 AT E416510 T1 ATE416510 T1 AT E416510T1 AT 04803458 T AT04803458 T AT 04803458T AT 04803458 T AT04803458 T AT 04803458T AT E416510 T1 ATE416510 T1 AT E416510T1
Authority
AT
Austria
Prior art keywords
power amplifier
abstract
self
compensated
single chip
Prior art date
Application number
AT04803458T
Other languages
English (en)
Inventor
Per-Olof Brandt
Jonas Persson
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
Application granted granted Critical
Publication of ATE416510T1 publication Critical patent/ATE416510T1/de

Links

Classifications

    • 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
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • 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
    • H03F1/0211—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 supply voltage or current
    • 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
    • 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
    • H03F1/0266—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 by using a signal derived from the input signal
    • 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
    • H03F1/0272—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 by using a signal derived from the output signal
    • 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
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3247—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/34—DC amplifiers in which all stages are DC-coupled
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/102—A non-specified detector of a signal envelope being used in an amplifying circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/324—An amplitude modulator or demodulator being used in the amplifier circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/447—Indexing scheme relating to amplifiers the amplifier being protected to temperature influence
    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/474—A current mirror being used as sensor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/504—Indexing scheme relating to amplifiers the supply voltage or current being continuously controlled by a controlling signal, e.g. the controlling signal of a transistor implemented as variable resistor in a supply path for, an IC-block showed amplifier

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Amplifiers (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
AT04803458T 2003-12-05 2004-12-02 Einchip-leistungsverstärker und hüllkurvenmodulator ATE416510T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US52732103P 2003-12-05 2003-12-05
US10/869,987 US7145385B2 (en) 2003-12-05 2004-06-17 Single chip power amplifier and envelope modulator

Publications (1)

Publication Number Publication Date
ATE416510T1 true ATE416510T1 (de) 2008-12-15

Family

ID=34636615

Family Applications (1)

Application Number Title Priority Date Filing Date
AT04803458T ATE416510T1 (de) 2003-12-05 2004-12-02 Einchip-leistungsverstärker und hüllkurvenmodulator

Country Status (6)

Country Link
US (1) US7145385B2 (de)
EP (1) EP1702405B1 (de)
KR (1) KR20060114339A (de)
AT (1) ATE416510T1 (de)
DE (1) DE602004018189D1 (de)
WO (1) WO2005055415A2 (de)

Families Citing this family (78)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7502422B2 (en) * 2003-06-04 2009-03-10 M/A—COM, Inc. Electromagnetic wave transmitter systems, methods and articles of manufacture
US7340007B2 (en) * 2003-09-16 2008-03-04 M/A-Com, Inc. Apparatus, methods and articles of manufacture for pre-emphasis filtering of a modulated signal
US7298854B2 (en) * 2002-12-04 2007-11-20 M/A-Com, Inc. Apparatus, methods and articles of manufacture for noise reduction in electromagnetic signal processing
US7551685B2 (en) * 2003-08-25 2009-06-23 M/A-Com, Inc. Apparatus, methods and articles of manufacture for signal correction using adaptive phase re-alignment
US7254195B2 (en) * 2003-08-25 2007-08-07 M/A-Com, Inc. Apparatus, methods and articles of manufacture for dynamic differential delay correction
US7215193B2 (en) * 2004-11-23 2007-05-08 M/A-Com, Inc. Method and apparatus for limiting power amplifier voltage excursions
US7426372B2 (en) * 2005-03-31 2008-09-16 M/A-Com Eurotec B.V. Piecewise linearizer circuit for radio frequency amplification
US20060255997A1 (en) * 2005-04-08 2006-11-16 M/A-Com, Inc. And M/A-Com Eurotec Bv Differential analog filter
US8224265B1 (en) 2005-06-13 2012-07-17 Rf Micro Devices, Inc. Method for optimizing AM/AM and AM/PM predistortion in a mobile terminal
US7307570B2 (en) * 2005-07-20 2007-12-11 M/A-Com, Inc. Method and apparatus to emulate a filter
US7436339B2 (en) * 2005-07-20 2008-10-14 M/A-Com, Inc. Method and apparatus to emulate a filter using digital elements
US20070087770A1 (en) * 2005-10-14 2007-04-19 Hong Gan Methods and apparatuses for transmission power control in a wireless communication system
US8884714B2 (en) * 2005-12-22 2014-11-11 Pine Valley Investments, Inc. Apparatus, system, and method for digital base modulation of power amplifier in polar transmitter
US7599448B2 (en) * 2006-02-03 2009-10-06 Pine Valley Investments, Inc. Multi-mode selectable modulation architecture calibration and power control apparatus, system, and method for radio frequency power amplifier
US7599418B2 (en) 2006-02-16 2009-10-06 Pine Valley Investments, Inc. Method and apparatus for a frequency hopper
US20070216455A1 (en) * 2006-03-17 2007-09-20 M/A-Com, Inc. Partial cascode delay locked loop architecture
US7596184B2 (en) 2006-03-30 2009-09-29 Pine Valley Investments, Inc. Apparatus, system, and method for amplitude-phase synchronization in polar transmitter
US7317412B2 (en) 2006-05-15 2008-01-08 M/A-Com, Inc. Techniques for biasing a radio frequency digital to analog converter
US7689182B1 (en) * 2006-10-12 2010-03-30 Rf Micro Devices, Inc. Temperature compensated bias for AM/PM improvement
JP4425262B2 (ja) * 2006-12-07 2010-03-03 株式会社日立国際電気 フィードフォワード増幅器
US8050783B2 (en) * 2007-03-12 2011-11-01 Pine Valley Investments, Inc. System and method for pre-distorting a device input
US7869543B2 (en) * 2007-03-13 2011-01-11 Pine Valley Investments, Inc. System and method for synchronization, power control, calibration, and modulation in communication transmitters
US8009765B2 (en) * 2007-03-13 2011-08-30 Pine Valley Investments, Inc. Digital polar transmitter
US20090027112A1 (en) * 2007-07-26 2009-01-29 Chin Li Controllable precision transconductance
US8073044B2 (en) * 2008-01-02 2011-12-06 Broadcom Corporation Polar transmitter with digital and analog filtering of envelope
US8854019B1 (en) 2008-09-25 2014-10-07 Rf Micro Devices, Inc. Hybrid DC/DC power converter with charge-pump and buck converter
US9166471B1 (en) 2009-03-13 2015-10-20 Rf Micro Devices, Inc. 3D frequency dithering for DC-to-DC converters used in multi-mode cellular transmitters
US8315576B2 (en) 2009-05-05 2012-11-20 Rf Micro Devices, Inc. Capacitive compensation of cascaded directional couplers
US8548398B2 (en) 2010-02-01 2013-10-01 Rf Micro Devices, Inc. Envelope power supply calibration of a multi-mode radio frequency power amplifier
US8538355B2 (en) 2010-04-19 2013-09-17 Rf Micro Devices, Inc. Quadrature power amplifier architecture
US8571492B2 (en) 2010-04-20 2013-10-29 Rf Micro Devices, Inc. DC-DC converter current sensing
US8565694B2 (en) 2010-04-20 2013-10-22 Rf Micro Devices, Inc. Split current current digital-to-analog converter (IDAC) for dynamic device switching (DDS) of an RF PA stage
US9030256B2 (en) 2010-04-20 2015-05-12 Rf Micro Devices, Inc. Overlay class F choke
US9214865B2 (en) 2010-04-20 2015-12-15 Rf Micro Devices, Inc. Voltage compatible charge pump buck and buck power supplies
US8731498B2 (en) 2010-04-20 2014-05-20 Rf Micro Devices, Inc. Temperature correcting an envelope power supply signal for RF PA circuitry
US8542061B2 (en) 2010-04-20 2013-09-24 Rf Micro Devices, Inc. Charge pump based power amplifier envelope power supply and bias power supply
US9553550B2 (en) 2010-04-20 2017-01-24 Qorvo Us, Inc. Multiband RF switch ground isolation
US8942650B2 (en) 2010-04-20 2015-01-27 Rf Micro Devices, Inc. RF PA linearity requirements based converter operating mode selection
US9362825B2 (en) 2010-04-20 2016-06-07 Rf Micro Devices, Inc. Look-up table based configuration of a DC-DC converter
US8947157B2 (en) 2010-04-20 2015-02-03 Rf Micro Devices, Inc. Voltage multiplier charge pump buck
US9048787B2 (en) 2010-04-20 2015-06-02 Rf Micro Devices, Inc. Combined RF detector and RF attenuator with concurrent outputs
US8983410B2 (en) 2010-04-20 2015-03-17 Rf Micro Devices, Inc. Configurable 2-wire/3-wire serial communications interface
US9214900B2 (en) 2010-04-20 2015-12-15 Rf Micro Devices, Inc. Interference reduction between RF communications bands
US8892063B2 (en) 2010-04-20 2014-11-18 Rf Micro Devices, Inc. Linear mode and non-linear mode quadrature PA circuitry
US8942651B2 (en) 2010-04-20 2015-01-27 Rf Micro Devices, Inc. Cascaded converged power amplifier
US8913971B2 (en) 2010-04-20 2014-12-16 Rf Micro Devices, Inc. Selecting PA bias levels of RF PA circuitry during a multislot burst
US8811920B2 (en) 2010-04-20 2014-08-19 Rf Micro Devices, Inc. DC-DC converter semiconductor die structure
US9008597B2 (en) 2010-04-20 2015-04-14 Rf Micro Devices, Inc. Direct current (DC)-DC converter having a multi-stage output filter
US8811921B2 (en) 2010-04-20 2014-08-19 Rf Micro Devices, Inc. Independent PA biasing of a driver stage and a final stage
US8712349B2 (en) 2010-04-20 2014-04-29 Rf Micro Devices, Inc. Selecting a converter operating mode of a PA envelope power supply
US8831544B2 (en) 2010-04-20 2014-09-09 Rf Micro Devices, Inc. Dynamic device switching (DDS) of an in-phase RF PA stage and a quadrature-phase RF PA stage
US8559898B2 (en) 2010-04-20 2013-10-15 Rf Micro Devices, Inc. Embedded RF PA temperature compensating bias transistor
US8699973B2 (en) 2010-04-20 2014-04-15 Rf Micro Devices, Inc. PA bias power supply efficiency optimization
US8706063B2 (en) 2010-04-20 2014-04-22 Rf Micro Devices, Inc. PA envelope power supply undershoot compensation
US8989685B2 (en) 2010-04-20 2015-03-24 Rf Micro Devices, Inc. Look-up table based configuration of multi-mode multi-band radio frequency power amplifier circuitry
US8913967B2 (en) 2010-04-20 2014-12-16 Rf Micro Devices, Inc. Feedback based buck timing of a direct current (DC)-DC converter
US9577590B2 (en) 2010-04-20 2017-02-21 Qorvo Us, Inc. Dual inductive element charge pump buck and buck power supplies
US8958763B2 (en) 2010-04-20 2015-02-17 Rf Micro Devices, Inc. PA bias power supply undershoot compensation
US8515361B2 (en) 2010-04-20 2013-08-20 Rf Micro Devices, Inc. Frequency correction of a programmable frequency oscillator by propagation delay compensation
US8983407B2 (en) * 2010-04-20 2015-03-17 Rf Micro Devices, Inc. Selectable PA bias temperature compensation circuitry
US9077405B2 (en) 2010-04-20 2015-07-07 Rf Micro Devices, Inc. High efficiency path based power amplifier circuitry
US8842399B2 (en) 2010-04-20 2014-09-23 Rf Micro Devices, Inc. ESD protection of an RF PA semiconductor die using a PA controller semiconductor die
US9900204B2 (en) 2010-04-20 2018-02-20 Qorvo Us, Inc. Multiple functional equivalence digital communications interface
US9184701B2 (en) 2010-04-20 2015-11-10 Rf Micro Devices, Inc. Snubber for a direct current (DC)-DC converter
WO2013009640A2 (en) 2011-07-08 2013-01-17 Skyworks Solutions, Inc. Signal path termination
US9679869B2 (en) 2011-09-02 2017-06-13 Skyworks Solutions, Inc. Transmission line for high performance radio frequency applications
KR101767718B1 (ko) 2011-11-04 2017-08-11 스카이워크스 솔루션즈, 인코포레이티드 전력 증폭기들에 대한 장치 및 방법
US9876478B2 (en) 2011-11-04 2018-01-23 Skyworks Solutions, Inc. Apparatus and methods for wide local area network power amplifiers
US9467940B2 (en) 2011-11-11 2016-10-11 Skyworks Solutions, Inc. Flip-chip linear power amplifier with high power added efficiency
US9065505B2 (en) 2012-01-31 2015-06-23 Rf Micro Devices, Inc. Optimal switching frequency for envelope tracking power supply
CN103597742A (zh) 2012-06-14 2014-02-19 西凯渥资讯处理科技公司 包含相关系统、装置及方法的功率放大器模块
US10408861B2 (en) * 2015-03-04 2019-09-10 Rohde & Schwarz Gmbh & Co. Kg Circuit for compensating an offset voltage in an amplifier
CN105007117B (zh) * 2015-05-22 2018-11-02 深圳市磊科实业有限公司 一种自动校准bob发送功率的方法
KR20160148873A (ko) 2015-06-17 2016-12-27 민병호 선박도료용 시너의 흐름성 조절제 제조 방법
US10181820B2 (en) * 2016-05-17 2019-01-15 Skyworks Solutions, Inc. Power amplification system with envelope-based bias
CN108880487A (zh) * 2018-06-27 2018-11-23 成都九洲迪飞科技有限责任公司 一种功率放大器保护电路、方法及功率放大电路
KR20200116366A (ko) 2019-04-01 2020-10-12 민병호 선박도료용 시너의 흐름성 조절제 제조 방법
CN111740711B (zh) * 2020-07-22 2024-07-19 广东工业大学 具有模拟预失真和温度补偿的ab类射频功率放大器

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0693823B1 (de) 1994-07-18 2001-04-18 Infineon Technologies AG Schaltungsanordnung, insbesondere für digitale Modulationseinrichtungen
US6043707A (en) 1999-01-07 2000-03-28 Motorola, Inc. Method and apparatus for operating a radio-frequency power amplifier as a variable-class linear amplifier
US6198347B1 (en) * 1999-07-29 2001-03-06 Tropian, Inc. Driving circuits for switch mode RF power amplifiers
US6559722B1 (en) * 1999-08-10 2003-05-06 Anadigics, Inc. Low bias current/temperature compensation current mirror for linear power amplifier
DE10039438C2 (de) 2000-08-11 2002-06-20 Infineon Technologies Ag Zweistufiger Operationsverstärker
US6734724B1 (en) * 2000-10-06 2004-05-11 Tropian, Inc. Power control and modulation of switched-mode power amplifiers with one or more stages
AU2002228748A1 (en) 2000-10-31 2002-05-15 Telefonaktiebolaget Lm Ericsson (Publ) Iq modulator
US6839549B2 (en) 2000-12-14 2005-01-04 Ericsson Inc. System and method of RF power amplification
CA2448241A1 (en) 2001-05-31 2002-12-05 Wisconsin Alumni Research Foundation Conjugated nonadecadienoic acid compositions
DE10150476A1 (de) 2001-10-16 2003-04-17 Thomson Brandt Gmbh Wireless LAN
US6566944B1 (en) * 2002-02-21 2003-05-20 Ericsson Inc. Current modulator with dynamic amplifier impedance compensation
DE60224922D1 (de) 2002-05-31 2008-03-20 Ericsson Telefon Ab L M Leistungsverstärker
DE60226317T2 (de) 2002-08-01 2009-06-25 Telefonaktiebolaget Lm Ericsson (Publ) Schaltung für leistungsverstärker

Also Published As

Publication number Publication date
WO2005055415A3 (en) 2005-07-21
EP1702405B1 (de) 2008-12-03
WO2005055415A2 (en) 2005-06-16
DE602004018189D1 (de) 2009-01-15
EP1702405A2 (de) 2006-09-20
US7145385B2 (en) 2006-12-05
KR20060114339A (ko) 2006-11-06
US20050122164A1 (en) 2005-06-09

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