ATE377865T1 - Verstärkung mit hohem wirkungsgrad - Google Patents

Verstärkung mit hohem wirkungsgrad

Info

Publication number
ATE377865T1
ATE377865T1 AT03753814T AT03753814T ATE377865T1 AT E377865 T1 ATE377865 T1 AT E377865T1 AT 03753814 T AT03753814 T AT 03753814T AT 03753814 T AT03753814 T AT 03753814T AT E377865 T1 ATE377865 T1 AT E377865T1
Authority
AT
Austria
Prior art keywords
supply voltage
power supply
reference signal
adjusted
high efficiency
Prior art date
Application number
AT03753814T
Other languages
English (en)
Inventor
Martin Paul Wilson
Original Assignee
Nujira Ltd
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 Nujira Ltd filed Critical Nujira Ltd
Application granted granted Critical
Publication of ATE377865T1 publication Critical patent/ATE377865T1/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
    • 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
    • H03F1/0244—Stepped control
    • H03F1/025—Stepped control 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
    • H03F1/0211—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
    • H03F1/0216—Continuous control
    • H03F1/0222—Continuous control 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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current 
    • G05F1/46—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
    • H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
    • 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
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • 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
    • 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
    • H03F2200/331—Sigma delta modulation being used in an amplifying circuit
    • 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
    • H03F2200/504—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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/511—Many discrete supply voltages or currents or voltage levels can be chosen by a control signal in an IC-block amplifier circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Amplifiers (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
AT03753814T 2003-02-19 2003-10-17 Verstärkung mit hohem wirkungsgrad ATE377865T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0303826A GB2398648B (en) 2003-02-19 2003-02-19 Power supply stage for an amplifier

Publications (1)

Publication Number Publication Date
ATE377865T1 true ATE377865T1 (de) 2007-11-15

Family

ID=9953312

Family Applications (1)

Application Number Title Priority Date Filing Date
AT03753814T ATE377865T1 (de) 2003-02-19 2003-10-17 Verstärkung mit hohem wirkungsgrad

Country Status (11)

Country Link
US (7) US7482869B2 (de)
EP (1) EP1597821B1 (de)
JP (1) JP4609931B2 (de)
KR (1) KR101126671B1 (de)
CN (1) CN100488030C (de)
AT (1) ATE377865T1 (de)
AU (1) AU2003271975A1 (de)
CA (1) CA2516706C (de)
DE (1) DE60317371T2 (de)
GB (1) GB2398648B (de)
WO (1) WO2004075398A1 (de)

Families Citing this family (210)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2398648B (en) 2003-02-19 2005-11-09 Nujira Ltd Power supply stage for an amplifier
GB2426392B (en) 2003-12-09 2007-05-30 Nujira Ltd Transformer based voltage supply
GB0418991D0 (en) 2004-08-25 2004-09-29 Nujira Ltd High efficiency variable voltage supply
US7706467B2 (en) 2004-12-17 2010-04-27 Andrew Llc Transmitter with an envelope tracking power amplifier utilizing digital predistortion of the signal envelope
GB2425418B (en) * 2005-04-22 2007-09-19 Motorola Inc Amplifier circuit and rf transmitter incorporating the circuit
JP5003134B2 (ja) * 2006-01-10 2012-08-15 日本電気株式会社 増幅装置
US8093946B2 (en) 2006-03-17 2012-01-10 Nujira Limited Joint optimisation of supply and bias modulation
JP5122764B2 (ja) * 2006-05-29 2013-01-16 京セラ株式会社 携帯無線機及びそれに用いるパワーアンプの制御方法
ATE506744T1 (de) * 2006-07-24 2011-05-15 Ericsson Telefon Ab L M Verfahren zur steuerung eines linearverstärkers und leistungsverstärkeranordnung
JP5028966B2 (ja) * 2006-11-15 2012-09-19 日本電気株式会社 増幅器
JP2008178226A (ja) * 2007-01-18 2008-07-31 Fujitsu Ltd 電源装置および負荷装置への電源電圧の供給方法
GB0715254D0 (en) * 2007-08-03 2007-09-12 Wolfson Ltd Amplifier circuit
KR20090036670A (ko) * 2007-10-10 2009-04-15 삼성전자주식회사 무선통신 시스템에서 포락선 트래킹 전력증폭 송신장치 및방법
JP4992741B2 (ja) 2008-01-25 2012-08-08 富士通株式会社 電力増幅器
GB2457764B (en) 2008-02-28 2013-01-23 Nujira Ltd Improved control loop for amplification stage
US8476976B2 (en) 2008-04-18 2013-07-02 Nujira Limited Multi-stage amplifier
GB2459894A (en) * 2008-05-09 2009-11-11 Nujira Ltd Switched supply stage with feedback
JP4666010B2 (ja) * 2008-06-12 2011-04-06 セイコーエプソン株式会社 負荷駆動回路及びインクジェットプリンター
US8995691B2 (en) * 2008-07-14 2015-03-31 Audera Acoustics Inc. Audio amplifier
GB2465146B (en) * 2008-11-04 2014-05-28 Nujira Ltd Improved power supply stage
US9634577B2 (en) 2008-11-11 2017-04-25 Massachusetts Institute Of Technology Inverter/power amplifier with capacitive energy transfer and related techniques
US8224264B1 (en) 2008-11-13 2012-07-17 Auriga Measurement Systems, LLC RF amplifier modulation circuit and related techniques
US8620240B2 (en) 2009-02-05 2013-12-31 Nec Corporation Power amplifier and power amplifying method
JP5874082B2 (ja) * 2009-04-09 2016-03-01 スナップトラック・インコーポレーテッド 多段増幅器
JP5251698B2 (ja) * 2009-04-20 2013-07-31 富士通株式会社 増幅回路、増幅方法及び電源電圧調整方法
US7786807B1 (en) * 2009-04-23 2010-08-31 Broadcom Corporation Cascode CMOS RF power amplifier with programmable feedback cascode bias under multiple supply voltages
US8072266B1 (en) * 2009-05-07 2011-12-06 National Semiconductor Corporation Class G amplifier with improved supply rail transition control
US9112452B1 (en) 2009-07-14 2015-08-18 Rf Micro Devices, Inc. High-efficiency power supply for a modulated load
WO2011013420A1 (ja) 2009-07-31 2011-02-03 日本電気株式会社 電力増幅装置、電力増幅方法および記憶媒体
US7888998B1 (en) 2009-09-22 2011-02-15 International Business Machines Corporation Low-voltage CMOS error amplifier with implicit reference
CN101662222B (zh) * 2009-09-30 2012-01-04 华为技术有限公司 电源跟踪方法和装置
GB2475729B (en) * 2009-11-27 2017-03-22 Snaptrack Inc Parallel correction amplifier
CN106887950B (zh) 2009-12-01 2020-12-11 天工方案公司 电压转换系统
US8509713B2 (en) * 2009-12-21 2013-08-13 Ubidyne, Inc. Single envelope tracking system for an active antenna array
US8265572B2 (en) * 2009-12-21 2012-09-11 Ubidyne, Inc. Multiple envelope tracking system for an active antenna array
CN102142768B (zh) * 2010-01-30 2013-10-09 华为技术有限公司 一种快速跟踪电源装置、控制方法及通信设备
US9277501B2 (en) 2010-02-08 2016-03-01 Broadcom Corporation Envelope tracker driven transmit beamforming
CN102148563B (zh) * 2010-02-10 2014-01-01 华为技术有限公司 一种跟踪电源、电源控制方法及通信设备
GB2479166B (en) 2010-03-30 2017-09-13 Snaptrack Inc Efficient supply voltage
GB2479579B (en) * 2010-04-15 2017-12-06 Snaptrack Inc Timing alignment for modulated supply
US9099961B2 (en) 2010-04-19 2015-08-04 Rf Micro Devices, Inc. Output impedance compensation of a pseudo-envelope follower power management system
CN102971962B (zh) 2010-04-19 2016-05-25 射频小型装置公司 伪包络跟随功率管理系统
US9431974B2 (en) 2010-04-19 2016-08-30 Qorvo Us, Inc. Pseudo-envelope following feedback delay compensation
GB2480687B (en) 2010-05-28 2018-04-04 Snaptrack Inc Power supply pre-distortion
CN101867284B (zh) * 2010-05-31 2012-11-21 华为技术有限公司 快速跟踪电源的控制方法、快速跟踪电源及系统
JP2012004882A (ja) * 2010-06-17 2012-01-05 Panasonic Corp 変調電源回路
US8106708B2 (en) * 2010-06-29 2012-01-31 Broadcom Corporation High speed low power multiple standard and supply output driver
WO2012047738A1 (en) 2010-09-29 2012-04-12 Rf Micro Devices, Inc. SINGLE μC-BUCKBOOST CONVERTER WITH MULTIPLE REGULATED SUPPLY OUTPUTS
GB2484475A (en) * 2010-10-11 2012-04-18 Toshiba Res Europ Ltd A power supply modulator for an RF amplifier, using a current-output class G amplifier
US8782107B2 (en) 2010-11-16 2014-07-15 Rf Micro Devices, Inc. Digital fast CORDIC for envelope tracking generation
US8797103B2 (en) 2010-12-07 2014-08-05 Skyworks Solutions, Inc. Apparatus and methods for capacitive load reduction
WO2012079031A1 (en) * 2010-12-09 2012-06-14 Rf Micro Devices, Inc. Pseudo-envelope follower power management system with high frequency ripple current compensation
US8587377B2 (en) 2010-12-13 2013-11-19 Skyworks Solutions, Inc. Apparatus and methods for biasing a power amplifier
US8598950B2 (en) 2010-12-14 2013-12-03 Skyworks Solutions, Inc. Apparatus and methods for capacitive load reduction
WO2012083256A2 (en) 2010-12-17 2012-06-21 Skyworks Solutions, Inc. Apparatus and methods for oscillation suppression
US9166538B2 (en) 2011-02-01 2015-10-20 Mediatek Singapore Pte. Ltd. Integrated circuit wireless communication unit and method for providing a power supply
US8975960B2 (en) 2011-02-01 2015-03-10 Mediatek Singapore Pte. Ltd. Integrated circuit wireless communication unit and method for providing a power supply
US8803605B2 (en) 2011-02-01 2014-08-12 Mediatek Singapore Pte. Ltd. Integrated circuit, wireless communication unit and method for providing a power supply
US8665018B2 (en) 2011-02-01 2014-03-04 Mediatek Singapore Pte. Ltd. Integrated circuit, wireless communication unit and method for a differential interface for an envelope tracking signal
CN103493368B (zh) 2011-02-07 2017-09-12 天工方案公司 用于包络跟踪校准的装置和方法
JP5621649B2 (ja) * 2011-02-18 2014-11-12 富士通株式会社 送信装置
WO2012125657A2 (en) 2011-03-15 2012-09-20 Skyworks Solutions, Inc. Apparatus and methods for capacitive load reduction
US8725218B2 (en) 2011-03-25 2014-05-13 R2 Semiconductor, Inc. Multimode operation DC-DC converter
US8610499B2 (en) 2011-04-11 2013-12-17 Auriga Measurement Systems, LLC Radio frequency (RF) amplifier utilizing a predistortion circuit and related techniques
US8718188B2 (en) 2011-04-25 2014-05-06 Skyworks Solutions, Inc. Apparatus and methods for envelope tracking
US9246460B2 (en) 2011-05-05 2016-01-26 Rf Micro Devices, Inc. Power management architecture for modulated and constant supply operation
US9247496B2 (en) 2011-05-05 2016-01-26 Rf Micro Devices, Inc. Power loop control based envelope tracking
US9379667B2 (en) 2011-05-05 2016-06-28 Rf Micro Devices, Inc. Multiple power supply input parallel amplifier based envelope tracking
US9136795B2 (en) * 2011-05-19 2015-09-15 Skyworks Solutions, Inc. Variable switched DC-to-DC voltage converter
GB2491188A (en) 2011-05-27 2012-11-28 Nujira Ltd Timing alignment in a polar transmitter
GB2491186A (en) * 2011-05-27 2012-11-28 Nujira Ltd A combined analogue and digital interface for the envelope path of an envelope-tracking amplifier
WO2012166992A1 (en) 2011-05-31 2012-12-06 Rf Micro Devices, Inc. Rugged iq receiver based rf gain measurements
US8704594B2 (en) 2011-06-09 2014-04-22 Auriga Measurement Systems, LLC Dual rail out-phased envelope tracking modulator
IL213624A (en) * 2011-06-16 2016-02-29 David Leonardo Fleischer A method and system for accelerating power supply in power amplifiers
JP2013005209A (ja) * 2011-06-16 2013-01-07 Panasonic Corp 変調電源回路
WO2012176578A1 (ja) 2011-06-22 2012-12-27 株式会社村田製作所 高周波電力増幅回路用電源装置および高周波電力増幅装置
US9263996B2 (en) 2011-07-20 2016-02-16 Rf Micro Devices, Inc. Quasi iso-gain supply voltage function for envelope tracking systems
US9484797B2 (en) 2011-10-26 2016-11-01 Qorvo Us, Inc. RF switching converter with ripple correction
US9024688B2 (en) 2011-10-26 2015-05-05 Rf Micro Devices, Inc. Dual parallel amplifier based DC-DC converter
US9294041B2 (en) 2011-10-26 2016-03-22 Rf Micro Devices, Inc. Average frequency control of switcher for envelope tracking
US9250643B2 (en) 2011-11-30 2016-02-02 Rf Micro Devices, Inc. Using a switching signal delay to reduce noise from a switching power supply
US9515621B2 (en) 2011-11-30 2016-12-06 Qorvo Us, Inc. Multimode RF amplifier system
US9256234B2 (en) 2011-12-01 2016-02-09 Rf Micro Devices, Inc. Voltage offset loop for a switching controller
US9280163B2 (en) 2011-12-01 2016-03-08 Rf Micro Devices, Inc. Average power tracking controller
WO2013082384A1 (en) 2011-12-01 2013-06-06 Rf Micro Devices, Inc. Rf power converter
US9041365B2 (en) 2011-12-01 2015-05-26 Rf Micro Devices, Inc. Multiple mode RF power converter
US9494962B2 (en) 2011-12-02 2016-11-15 Rf Micro Devices, Inc. Phase reconfigurable switching power supply
US9813036B2 (en) 2011-12-16 2017-11-07 Qorvo Us, Inc. Dynamic loadline power amplifier with baseband linearization
US9298198B2 (en) 2011-12-28 2016-03-29 Rf Micro Devices, Inc. Noise reduction for envelope tracking
CN102571131B (zh) * 2012-01-12 2017-02-15 中兴通讯股份有限公司 电源装置及其管理电源的方法和无线通信终端
US8810314B2 (en) 2012-02-15 2014-08-19 Auriga Measurement Systems, LLC Envelope tracking amplifier
US9069365B2 (en) 2012-02-18 2015-06-30 R2 Semiconductor, Inc. DC-DC converter enabling rapid output voltage changes
EP2648323B1 (de) * 2012-04-03 2018-09-05 Nxp B.V. Schaltnetzteil mit aus Lastsollwert abgeleiteter Vorsteuerung
CN104272585B (zh) 2012-05-08 2017-08-01 株式会社村田制作所 高频功率放大电路用电源装置以及高频功率放大装置
CN104662792B (zh) 2012-07-26 2017-08-08 Qorvo美国公司 用于包络跟踪的可编程rf陷波滤波器
US8934854B2 (en) 2012-08-29 2015-01-13 Crestcom, Inc. Transmitter with peak-tracking PAPR reduction and method therefor
WO2014037926A2 (en) 2012-09-10 2014-03-13 Innovaradio S.A. High-frequency drain power supply to decrease power dissipation in class-ab power amplifiers
US9225231B2 (en) 2012-09-14 2015-12-29 Rf Micro Devices, Inc. Open loop ripple cancellation circuit in a DC-DC converter
US9197256B2 (en) 2012-10-08 2015-11-24 Rf Micro Devices, Inc. Reducing effects of RF mixer-based artifact using pre-distortion of an envelope power supply signal
CN103731110B (zh) * 2012-10-11 2017-05-10 快捷半导体(苏州)有限公司 一种运算放大器电路及其实现方法
US9207692B2 (en) 2012-10-18 2015-12-08 Rf Micro Devices, Inc. Transitioning from envelope tracking to average power tracking
US9537456B2 (en) 2012-10-30 2017-01-03 Eta Devices, Inc. Asymmetric multilevel backoff amplifier with radio-frequency splitter
US8824978B2 (en) * 2012-10-30 2014-09-02 Eta Devices, Inc. RF amplifier architecture and related techniques
US8829993B2 (en) 2012-10-30 2014-09-09 Eta Devices, Inc. Linearization circuits and methods for multilevel power amplifier systems
US9166536B2 (en) 2012-10-30 2015-10-20 Eta Devices, Inc. Transmitter architecture and related methods
US9627975B2 (en) 2012-11-16 2017-04-18 Qorvo Us, Inc. Modulated power supply system and method with automatic transition between buck and boost modes
US9107167B2 (en) 2012-12-03 2015-08-11 Broadcom Corporation Envelope tracking signal bandwidth control
US9225302B2 (en) 2012-12-03 2015-12-29 Broadcom Corporation Controlled power boost for envelope tracker
US9167514B2 (en) 2012-12-03 2015-10-20 Broadcom Corporation Unequal amplifier gain compression via shaping table
US9560595B2 (en) * 2012-12-03 2017-01-31 Broadcom Corporation Dynamic operating bandwidth configuration for an envelope tracker
WO2014113027A1 (en) * 2013-01-18 2014-07-24 Lsi Corporation High-voltage voltage-switched class-s amplifier
WO2014116933A2 (en) 2013-01-24 2014-07-31 Rf Micro Devices, Inc Communications based adjustments of an envelope tracking power supply
GB2510397A (en) 2013-02-01 2014-08-06 Nujira Ltd Envelope tracking power supply with feedback
GB2510394A (en) * 2013-02-01 2014-08-06 Nujira Ltd Envelope tracking power supply with low power modes
GB2511733B (en) 2013-02-01 2020-08-19 Snaptrack Inc 2G support for 2G and 3G/4G envelope tracking modulator
US9178472B2 (en) 2013-02-08 2015-11-03 Rf Micro Devices, Inc. Bi-directional power supply signal based linear amplifier
US9197162B2 (en) 2013-03-14 2015-11-24 Rf Micro Devices, Inc. Envelope tracking power supply voltage dynamic range reduction
US9203353B2 (en) 2013-03-14 2015-12-01 Rf Micro Devices, Inc. Noise conversion gain limited RF power amplifier
US9154095B2 (en) 2013-03-15 2015-10-06 Bose Corporation Boost-on-demand amplifier
US9184705B2 (en) 2013-03-15 2015-11-10 Bose Corporation Feedback mechanism for boost-on-demand amplifiers
US9479118B2 (en) 2013-04-16 2016-10-25 Rf Micro Devices, Inc. Dual instantaneous envelope tracking
KR101738730B1 (ko) 2013-04-23 2017-05-22 스카이워크스 솔루션즈, 인코포레이티드 전력 증폭기 시스템에서의 엔벨로프 정형화 장치 및 방법
US8909180B1 (en) 2013-06-26 2014-12-09 Motorola Solutions, Inc. Method and apparatus for power supply modulation of a radio frequency signal
EP3017541B1 (de) * 2013-07-05 2019-08-21 MediaTek Singapore Pte Ltd. Drahtlose kommunikationseinheit mit integriertem schaltkreis und stromversorgungsverfahren dafür
US9374005B2 (en) 2013-08-13 2016-06-21 Rf Micro Devices, Inc. Expanded range DC-DC converter
GB2532681B (en) 2013-09-13 2021-05-19 Toshiba Res Europe Limited Envelope modulator
KR101548804B1 (ko) * 2013-09-16 2015-08-31 삼성전기주식회사 기판 내장용 적층 세라믹 전자부품 및 적층 세라믹 전자부품 내장형 인쇄회로기판
US10840805B2 (en) 2013-09-24 2020-11-17 Eta Devices, Inc. Integrated power supply and modulator for radio frequency power amplifiers
US9755672B2 (en) 2013-09-24 2017-09-05 Eta Devices, Inc. Integrated power supply and modulator for radio frequency power amplifiers
US10027288B2 (en) 2013-10-28 2018-07-17 Kabushiki Kaisha Toshiba Amplifier
CN103929134B (zh) * 2014-05-08 2017-05-31 合肥东芯通信股份有限公司 一种电源调制方法及装置
US9614476B2 (en) 2014-07-01 2017-04-04 Qorvo Us, Inc. Group delay calibration of RF envelope tracking
US9768731B2 (en) 2014-07-23 2017-09-19 Eta Devices, Inc. Linearity and noise improvement for multilevel power amplifier systems using multi-pulse drain transitions
US9445371B2 (en) 2014-08-13 2016-09-13 Skyworks Solutions, Inc. Apparatus and methods for wideband envelope tracking systems
US9602056B2 (en) 2014-09-19 2017-03-21 Skyworks Solutions, Inc. Amplifier with base current reuse
US9621034B2 (en) 2014-09-30 2017-04-11 Skyworks Solutions, Inc. Frequency modulation based voltage controller configuration
FR3031851B1 (fr) 2015-01-15 2017-02-17 Amcad Eng Systeme de suivi de la puissance crete pour une amplification de puissance rf et procede de calcul de valeur de crete et de selection de tension d'alimentation associe
US9979421B2 (en) 2015-03-02 2018-05-22 Eta Devices, Inc. Digital pre-distortion (DPD) training and calibration system and related techniques
FR3036897B1 (fr) 2015-05-29 2018-06-15 Wupatec Bloc convertisseur continu-continu, convertisseur continu-continu le comprenant et systeme de suivi d'enveloppe associe
US9843294B2 (en) 2015-07-01 2017-12-12 Qorvo Us, Inc. Dual-mode envelope tracking power converter circuitry
US9912297B2 (en) 2015-07-01 2018-03-06 Qorvo Us, Inc. Envelope tracking power converter circuitry
CN114710122B (zh) * 2015-08-14 2025-10-28 维尔塞特公司 数字动态偏置电路
US10103693B2 (en) 2015-09-30 2018-10-16 Skyworks Solutions, Inc. Power amplifier linearization system and method
US9973147B2 (en) 2016-05-10 2018-05-15 Qorvo Us, Inc. Envelope tracking power management circuit
FR3053855B1 (fr) 2016-07-06 2018-07-27 Wupa Tec Systeme de suivi de la puissance crete d'un signal de telecommunication et procede de calcul de valeur de crete et de selection de tension d'alimentation associe
US10110169B2 (en) 2016-09-14 2018-10-23 Skyworks Solutions, Inc. Apparatus and methods for envelope tracking systems with automatic mode selection
WO2018128937A1 (en) 2017-01-06 2018-07-12 Avnera Corporation Power supply for class g amplifier
US10090808B1 (en) * 2017-03-30 2018-10-02 Intel IP Corporation Feed-forward envelope tracking
US10236831B2 (en) 2017-05-12 2019-03-19 Skyworks Solutions, Inc. Envelope trackers providing compensation for power amplifier output load variation
US10516368B2 (en) 2017-06-21 2019-12-24 Skyworks Solutions, Inc. Fast envelope tracking systems for power amplifiers
US10615757B2 (en) 2017-06-21 2020-04-07 Skyworks Solutions, Inc. Wide bandwidth envelope trackers
US10158330B1 (en) * 2017-07-17 2018-12-18 Qorvo Us, Inc. Multi-mode envelope tracking amplifier circuit
US10476437B2 (en) 2018-03-15 2019-11-12 Qorvo Us, Inc. Multimode voltage tracker circuit
US11581854B2 (en) * 2018-04-26 2023-02-14 Mediatek Inc. Envelope tracking supply modulator topology for wipe-bandwidth radio frequency transmitter
US11108363B2 (en) 2018-09-04 2021-08-31 Qorvo Us, Inc. Envelope tracking circuit and related power amplifier apparatus
US10749477B2 (en) 2018-09-21 2020-08-18 Qualcomm Incorporated Series voltage regulation modulating power supply
US11057012B2 (en) 2018-10-19 2021-07-06 Qorvo Us, Inc. Distributed envelope tracking amplifier circuit and related apparatus
US10819287B2 (en) 2018-10-19 2020-10-27 Qorvo Us, Inc. Multi-voltage generation circuit and related envelope tracking amplifier apparatus
US10903796B2 (en) 2018-10-19 2021-01-26 Qorvo Us, Inc. Voltage generation circuit and related envelope tracking amplifier apparatus
US11146213B2 (en) 2019-01-15 2021-10-12 Qorvo Us, Inc. Multi-radio access technology envelope tracking amplifier apparatus
US11233481B2 (en) 2019-02-18 2022-01-25 Qorvo Us, Inc. Modulated power apparatus
US10938350B2 (en) 2019-03-13 2021-03-02 Qorvo Us, Inc. Multi-mode envelope tracking target voltage circuit and related apparatus
US11088658B2 (en) 2019-03-13 2021-08-10 Qorvo Us, Inc. Envelope tracking amplifier apparatus
US10992264B2 (en) 2019-03-13 2021-04-27 Qorvo Us, Inc. Envelope tracking circuit and related apparatus
US11374482B2 (en) 2019-04-02 2022-06-28 Qorvo Us, Inc. Dual-modulation power management circuit
US11424719B2 (en) 2019-04-18 2022-08-23 Qorvo Us, Inc. Multi-bandwidth envelope tracking integrated circuit
US11139780B2 (en) 2019-04-24 2021-10-05 Qorvo Us, Inc. Envelope tracking apparatus
US11038464B2 (en) 2019-05-30 2021-06-15 Qorvo Us, Inc. Envelope tracking amplifier apparatus
US11323075B2 (en) 2019-05-30 2022-05-03 Qorvo Us, Inc. Envelope tracking amplifier apparatus
US11349436B2 (en) 2019-05-30 2022-05-31 Qorvo Us, Inc. Envelope tracking integrated circuit
US12231098B2 (en) 2019-07-25 2025-02-18 Qorvo Us, Inc. Multi-mode power management apparatus
US11539289B2 (en) 2019-08-02 2022-12-27 Qorvo Us, Inc. Multi-level charge pump circuit
US11637531B1 (en) 2019-09-05 2023-04-25 Murata Manufacturing Co., Ltd. Supply generator and associated control methods
US11309922B2 (en) 2019-12-13 2022-04-19 Qorvo Us, Inc. Multi-mode power management integrated circuit in a small formfactor wireless apparatus
US11349513B2 (en) 2019-12-20 2022-05-31 Qorvo Us, Inc. Envelope tracking system
US11539330B2 (en) 2020-01-17 2022-12-27 Qorvo Us, Inc. Envelope tracking integrated circuit supporting multiple types of power amplifiers
US11716057B2 (en) 2020-01-28 2023-08-01 Qorvo Us, Inc. Envelope tracking circuitry
DE102020104090A1 (de) * 2020-02-17 2021-08-19 Comet Ag Hochfrequenzverstärker-Anordnung für einen Hochfrequenzgenerator
US11728774B2 (en) 2020-02-26 2023-08-15 Qorvo Us, Inc. Average power tracking power management integrated circuit
US12095422B2 (en) 2020-07-10 2024-09-17 Skyworks Solutions, Inc. Power amplifiers with supply capacitor switching
US11588449B2 (en) 2020-09-25 2023-02-21 Qorvo Us, Inc. Envelope tracking power amplifier apparatus
US11909385B2 (en) 2020-10-19 2024-02-20 Qorvo Us, Inc. Fast-switching power management circuit and related apparatus
WO2022103496A1 (en) 2020-11-16 2022-05-19 Qorvo Us, Inc. Power management circuit operable with multiple supply voltages
WO2022119626A1 (en) 2020-12-04 2022-06-09 Qorvo Us, Inc. Power management integrated circuit
US12212285B2 (en) 2020-12-22 2025-01-28 Qorvo Us, Inc. Power management apparatus operable with multiple configurations
US12267046B2 (en) 2021-02-15 2025-04-01 Qorvo Us, Inc. Power amplifier system
US12101063B2 (en) 2021-02-19 2024-09-24 Qorvo Us, Inc. Distributed power management apparatus
US12348189B2 (en) 2021-02-26 2025-07-01 Skyworks Solutions, Inc. Power amplifiers with supply capacitor switching
US12068720B2 (en) 2021-02-26 2024-08-20 Qorvo Us, Inc. Barely Doherty dual envelope tracking (BD2E) circuit
US12212286B2 (en) 2021-03-05 2025-01-28 Qorvo Us, Inc. Complementary envelope detector
US12126305B2 (en) 2021-05-27 2024-10-22 Qorvo Us, Inc. Radio frequency (RF) equalizer in an envelope tracking (ET) circuit
US12063018B2 (en) 2021-06-10 2024-08-13 Qorvo Us, Inc. Envelope tracking integrated circuit operable with multiple types of power amplifiers
US12199577B2 (en) 2021-06-18 2025-01-14 Qorvo Us, Inc. Envelope tracking voltage correction in a transmission circuit
US12231088B2 (en) 2021-06-18 2025-02-18 Qorvo Us, Inc. Wideband transmission circuit
US12206365B2 (en) 2021-06-18 2025-01-21 Qorvo Us, Inc. Voltage ripple suppression in a transmission circuit
US12413190B2 (en) 2021-08-16 2025-09-09 Skyworks Solutions, Inc. Power amplifier supply networks with harmonic terminations
US12401332B2 (en) * 2021-09-16 2025-08-26 Qorvo Us, Inc. Phase and amplitude error correction in a transmission circuit
US12323174B2 (en) 2021-09-16 2025-06-03 Qorvo Us, Inc. Amplitude-to-phase error correction in a transceiver circuit
US11906992B2 (en) 2021-09-16 2024-02-20 Qorvo Us, Inc. Distributed power management circuit
US12284003B2 (en) 2021-09-16 2025-04-22 Qorvo Us, Inc. Phase and amplitude error correction in a transmission circuit
US12526001B2 (en) 2022-01-18 2026-01-13 Qorvo Us, Inc. Linearized front-end operation using information from baseband circuit
US12273081B2 (en) 2022-01-27 2025-04-08 Qorvo Us, Inc. Voltage ripple reduction in a power management circuit
US20250150036A1 (en) * 2022-02-04 2025-05-08 Qorvo Us, Inc. Bias circuit for power amplifier
US12525934B2 (en) * 2022-03-17 2026-01-13 Skyworks Solutions, Inc. Power amplifiers with broadband matching networks
US12549138B1 (en) 2022-04-12 2026-02-10 Qorvo Us, Inc. Bandwidth adaptation in a transmission circuit
US12489402B2 (en) 2022-05-31 2025-12-02 Qorvo Us, Inc. Voltage ripple reduction in a power management circuit
US12381525B2 (en) * 2022-06-28 2025-08-05 Qorvo Us, Inc. Amplifier system
US12483213B2 (en) * 2022-09-30 2025-11-25 Skyworks Solutions, Inc. Systems and methods for pulse shaping voltage transitions in envelope tracking systems
US12573993B2 (en) 2022-10-06 2026-03-10 Murata Manufacturing Co., Ltd. Pulse-shaping networks with coupled magnetics
US12456957B2 (en) 2023-01-20 2025-10-28 Qorvo Us, Inc. Amplitude and phase error correction in a wireless communication circuit

Family Cites Families (74)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55108019A (en) * 1979-02-13 1980-08-19 Advantest Corp Reference voltage generator
US4276514A (en) * 1979-07-09 1981-06-30 Trw Inc. Wideband, phase compensated amplifier with negative feedback of distortion components in the output signal
JPS5768908A (en) * 1980-10-17 1982-04-27 Matsushita Electric Ind Co Ltd Amplifier
JPS62277806A (ja) * 1986-05-26 1987-12-02 Nippon Telegr & Teleph Corp <Ntt> 高周波増幅器
US4873493A (en) * 1987-02-20 1989-10-10 Victor Company Of Japan, Ltd. Audio amplifier
US4831334A (en) * 1987-06-08 1989-05-16 Hughes Aircraft Company Envelope amplifier
JPH01137706A (ja) * 1987-11-25 1989-05-30 Nec Corp パルスステップ音声増幅器
JPH04119707A (ja) * 1990-09-10 1992-04-21 Uchu Tsushin Kiso Gijutsu Kenkyusho:Kk 高効率増幅器
JPH05206771A (ja) * 1992-01-30 1993-08-13 Mitsubishi Electric Corp 自動出力電力制御回路
JPH05267941A (ja) * 1992-03-18 1993-10-15 Sanyo Electric Co Ltd 高効率型高周波電力増幅器
DE69328081T2 (de) * 1993-04-08 2000-11-09 Lecroy S.A., Meyrin Präzisionsverstärker mit sehr hoher Geschwindigkeit
GB9316869D0 (en) * 1993-08-13 1993-09-29 Philips Electronics Uk Ltd Transmitter and power amplifier therefor
FR2722350B1 (fr) * 1994-07-08 1996-08-23 Alcatel Espace Methode de linearisation d'un amplificateur non-lineaire, circuit de linearisation et amplificateur comportant un tel circuit
JPH08321724A (ja) * 1995-05-25 1996-12-03 Nec Corp 振幅変調回路および振幅変調方法
US5770971A (en) * 1996-07-26 1998-06-23 Northern Telecom Limited Distortion compensation control for a power amplifier
US5901346A (en) 1996-12-11 1999-05-04 Motorola, Inc. Method and apparatus utilizing a compensated multiple output signal source
US6396344B1 (en) * 1997-01-18 2002-05-28 Charles Gentzler Amplifier linearization by learned linear behavior
US5847602A (en) * 1997-03-03 1998-12-08 Hewlett-Packard Company Method and apparatus for linearizing an efficient class D/E power amplifier using delta modulation
US5880633A (en) 1997-05-08 1999-03-09 Motorola, Inc. High efficiency power amplifier
US6097252A (en) 1997-06-02 2000-08-01 Motorola, Inc. Method and apparatus for high efficiency power amplification
US5990735A (en) 1997-07-02 1999-11-23 Motorola, Inc. Method and apparatus for high efficiency power amplification
US5861777A (en) * 1997-07-02 1999-01-19 Motorola, Inc. Method and apparatus for compensation of phase distortion in power amplifiers
US5886572A (en) 1997-07-25 1999-03-23 Motorola, Inc. Method and apparatus for reducing distortion in a power amplifier
US5905407A (en) 1997-07-30 1999-05-18 Motorola, Inc. High efficiency power amplifier using combined linear and switching techniques with novel feedback system
US5831475A (en) 1997-08-04 1998-11-03 Motorola, Inc. Method and apparatus for delay matching in a power amplifier
US6084468A (en) 1997-10-06 2000-07-04 Motorola, Inc. Method and apparatus for high efficiency wideband power amplification
US6025754A (en) * 1997-11-03 2000-02-15 Harris Corporation Envelope modulated amplifier bias control and method
US5936464A (en) 1997-11-03 1999-08-10 Motorola, Inc. Method and apparatus for reducing distortion in a high efficiency power amplifier
US5923214A (en) 1997-12-17 1999-07-13 Motorola, Inc. Feedforward amplifier network with swept pilot tone for reducing distortion generated by a power amplifier
US5942938A (en) 1997-12-29 1999-08-24 Motorola, Inc. Method and apparatus for high efficiency power amplification
US6141541A (en) * 1997-12-31 2000-10-31 Motorola, Inc. Method, device, phone and base station for providing envelope-following for variable envelope radio frequency signals
US6138042A (en) 1997-12-31 2000-10-24 Motorola, Inc. Method, device, phone, and base station for providing an efficient tracking power converter for variable signals
US5898342A (en) * 1998-01-20 1999-04-27 Advanced Micro Devices Power amplifier arrangement and method for data signal interface
US6043712A (en) 1998-07-17 2000-03-28 Motorola, Inc. Linear power amplifier
US6064269A (en) 1998-07-31 2000-05-16 Motorola, Inc. Power amplifier with variable input voltage source
US6107880A (en) 1998-08-06 2000-08-22 Motorola, Inc. Method and apparatus for increasing the linearity of the phase and gain of a power amplifier circuit
US6069530A (en) 1998-09-16 2000-05-30 Motorola, Inc. Apparatus and method for linear power amplification
US6218897B1 (en) * 1998-12-24 2001-04-17 At&T Corp Reconfigurable linear power amplifier
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
US6166598A (en) 1999-07-22 2000-12-26 Motorola, Inc. Power amplifying circuit with supply adjust to control adjacent and alternate channel power
US6349216B1 (en) 1999-07-22 2002-02-19 Motorola, Inc. Load envelope following amplifier system
US6160449A (en) 1999-07-22 2000-12-12 Motorola, Inc. Power amplifying circuit with load adjust for control of adjacent and alternate channel power
US6438360B1 (en) 1999-07-22 2002-08-20 Motorola, Inc. Amplifier system with load control to produce an amplitude envelope
US6157253A (en) 1999-09-03 2000-12-05 Motorola, Inc. High efficiency power amplifier circuit with wide dynamic backoff range
US6252455B1 (en) 1999-10-07 2001-06-26 Motorola, Inc. Method and apparatus for efficient signal amplification
US7061313B2 (en) 2000-05-05 2006-06-13 Telefonaktiebolaget Lm Ericsson (Publ) Dual feedback linear amplifier
US6710646B1 (en) * 2000-05-05 2004-03-23 Telefonaktiebolaget Lm Ericsson Cuk style inverter with hysteretic control
US6300826B1 (en) * 2000-05-05 2001-10-09 Ericsson Telefon Ab L M Apparatus and method for efficiently amplifying wideband envelope signals
AU2001276206A1 (en) * 2000-07-12 2002-01-21 Indigo Manufacturing Inc. Power amplifier with multiple power supplies
KR100548763B1 (ko) * 2000-07-20 2006-02-06 엘지전자 주식회사 피드포워드 방식의 선형화기를 갖는 기지국 송신장치
GB2366461B (en) * 2000-08-31 2004-06-23 Element 14 Inc Switched supply for operational amplifier
US6606483B1 (en) 2000-10-10 2003-08-12 Motorola, Inc. Dual open and closed loop linear transmitter
JP2002118430A (ja) * 2000-10-11 2002-04-19 Kenwood Corp 増幅器、音響機器、及び音声出力方法
US6486733B2 (en) 2000-12-27 2002-11-26 Motorola, Inc. Method and apparatus for high efficiency power amplification
US6735419B2 (en) 2001-01-18 2004-05-11 Motorola, Inc. High efficiency wideband linear wireless power amplifier
JP2002314345A (ja) * 2001-04-16 2002-10-25 Sony Corp 高周波増幅回路およびこれを用いた無線通信装置
JP2003124821A (ja) * 2001-09-28 2003-04-25 Motorola Inc 送信電力制御回路
US6600369B2 (en) 2001-12-07 2003-07-29 Motorola, Inc. Wideband linear amplifier with predistortion error correction
US6661217B2 (en) 2001-12-21 2003-12-09 Telefonaktiebolaget L.M. Ericsson Wideband precision current sensor
US6657499B2 (en) * 2002-01-18 2003-12-02 Xicor, Inc. Method and circuit for controlling power amplifiers
US6661210B2 (en) * 2002-01-23 2003-12-09 Telfonaktiebolaget L.M. Ericsson Apparatus and method for DC-to-DC power conversion
US6792252B2 (en) * 2002-02-06 2004-09-14 Telefonaktiebolaget Lm Ericsson (Publ) Wideband error amplifier
US6788151B2 (en) * 2002-02-06 2004-09-07 Lucent Technologies Inc. Variable output power supply
US6741840B2 (en) 2002-03-13 2004-05-25 Motorola, Inc. RF transmitters with saturation detection and correction and methods therefor
JP2003273658A (ja) * 2002-03-15 2003-09-26 Hitachi Kokusai Electric Inc フィードフォワード増幅回路
US6794938B2 (en) 2002-03-19 2004-09-21 The University Of North Carolina At Charlotte Method and apparatus for cancellation of third order intermodulation distortion and other nonlinearities
GB0219466D0 (en) * 2002-08-21 2002-10-02 Roke Manor Research Multi-carrier power amplifier with switched PSU voltages
US7091777B2 (en) * 2002-09-30 2006-08-15 Lucent Technologies Inc. Controller for an RF power amplifier
US7116946B2 (en) * 2002-10-28 2006-10-03 Matsushita Electric Industrial Co., Ltd. Transmitter
US7301397B2 (en) * 2002-12-18 2007-11-27 Powerwave Technologies, Inc. Enhanced efficiency feed forward power amplifier with delay mismatched error cancellation loop
US6801082B2 (en) * 2002-12-31 2004-10-05 Motorola, Inc. Power amplifier circuit and method using bandlimited signal component estimates
GB2398648B (en) 2003-02-19 2005-11-09 Nujira Ltd Power supply stage for an amplifier
US7259630B2 (en) * 2003-07-23 2007-08-21 Andrew Corporation Elimination of peak clipping and improved efficiency for RF power amplifiers with a predistorter
US7042287B2 (en) * 2003-07-23 2006-05-09 Northrop Grumman Corporation System and method for reducing dynamic range and improving linearity in an amplication system

Also Published As

Publication number Publication date
EP1597821A1 (de) 2005-11-23
JP2006514472A (ja) 2006-04-27
AU2003271975A1 (en) 2004-09-09
GB0303826D0 (en) 2003-03-26
GB2398648B (en) 2005-11-09
CA2516706A1 (en) 2004-09-02
DE60317371T2 (de) 2008-08-28
WO2004075398A1 (en) 2004-09-02
GB2398648A (en) 2004-08-25
US7482869B2 (en) 2009-01-27
US20130300513A1 (en) 2013-11-14
US8749308B2 (en) 2014-06-10
US20060028271A1 (en) 2006-02-09
US20140285269A1 (en) 2014-09-25
EP1597821B1 (de) 2007-11-07
US20090128236A1 (en) 2009-05-21
US9190958B2 (en) 2015-11-17
US9118278B2 (en) 2015-08-25
KR101126671B1 (ko) 2012-03-30
JP4609931B2 (ja) 2011-01-12
US20150194933A1 (en) 2015-07-09
US20120212291A1 (en) 2012-08-23
KR20050116367A (ko) 2005-12-12
US9641132B2 (en) 2017-05-02
CA2516706C (en) 2011-02-15
CN1759532A (zh) 2006-04-12
US20140232470A1 (en) 2014-08-21
US8169261B2 (en) 2012-05-01
CN100488030C (zh) 2009-05-13
DE60317371D1 (de) 2007-12-20

Similar Documents

Publication Publication Date Title
ATE377865T1 (de) Verstärkung mit hohem wirkungsgrad
GB2451536B (en) Amplifier circuit and method of amplying a signal in an amplifier circuit
ATE439701T1 (de) System und verfahren zur hf-signalverstärkung
TW200737693A (en) Power amplifier with close-loop adaptive voltage supply
DE602004021751D1 (de) Leistungsverstärker
AU2001279113A1 (en) Amplification systems and methods using fixed and modulated power supply voltages and buck-boost control
ATE487271T1 (de) Zusammengesetzter leistungsverstärker
GB0418944D0 (en) Method for envelope clipping
DE602004017891D1 (de) Steuerung des leistungspegels einer ersten verstärkungsstufe für einen integrierten hf-leistungsverstärker
DE60231065D1 (de) Zusammengesetzte verstärkerstruktur
ATE441245T1 (de) N-wege-hf-leistungsverstärker mit vergrísserter backoff-leistung und mehrleistungseffizienz
TW200943698A (en) Method and apparatus for dynamically adjusting a transmitter&#39;s impedance and implementing a hybrid power amplifier therein which selectively connects linear and switch-mode power amplifiers in series
SE0004420D0 (sv) Förstärkare
TW200614643A (en) Power supply controller and method
GB2442924A (en) A method and apparatus for increasing the efficiency of low power amplifiers
GB2446351A (en) Method and apparatus for optimizing current consumption of amplifiers with power control
ATE303018T1 (de) Leistungsregelung für nicht konstante hüllmodulation
TW200740111A (en) Low distortion class-D amplifier and audio system thereof
TW200627791A (en) Power amplifier circuit and method thereof
TW200605495A (en) High frequency amplifier
SE9701452L (sv) Anordning och förfarande vid effektförstärkning av signal
BR0205016A (pt) Sistema de amplificação por modulação de espectro
DE50207805D1 (de) Arbeitspunktoptimierung von sendeleistungsverstärkern in mobilstationen

Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties