HK1065179A1 - Dynamic bias for rf power amplifiers - Google Patents

Dynamic bias for rf power amplifiers

Info

Publication number
HK1065179A1
HK1065179A1 HK04106423A HK04106423A HK1065179A1 HK 1065179 A1 HK1065179 A1 HK 1065179A1 HK 04106423 A HK04106423 A HK 04106423A HK 04106423 A HK04106423 A HK 04106423A HK 1065179 A1 HK1065179 A1 HK 1065179A1
Authority
HK
Hong Kong
Prior art keywords
signal
power amplifiers
voltage
dynamic bias
provides
Prior art date
Application number
HK04106423A
Other languages
English (en)
Inventor
Onid Kazakevich
Patrick Cabrol
Original Assignee
Interdigital Tech Corp
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 Interdigital Tech Corp filed Critical Interdigital Tech Corp
Publication of HK1065179A1 publication Critical patent/HK1065179A1/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/005—Control of transmission; Equalising
    • 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
    • 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
    • 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
    • H03F1/0233—Continuous control by using a signal derived from the output signal, e.g. bootstrapping the voltage supply
    • 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
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • 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
    • 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
    • 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
    • H03G3/3084—Automatic control in amplifiers having semiconductor devices in receivers or transmitters for electromagnetic waves other than radiowaves, e.g. lightwaves
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
    • 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
    • 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
    • H04B2001/0416—Circuits with power amplifiers having gain or transmission power control
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/08—Closed loop power control

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Amplifiers (AREA)
  • Transmitters (AREA)
  • Microwave Amplifiers (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
HK04106423A 2000-03-29 2003-07-02 Dynamic bias for rf power amplifiers HK1065179A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US19252800P 2000-03-29 2000-03-29
US09/773,857 US6684064B2 (en) 2000-03-29 2001-02-01 Dynamic bias for RF power amplifiers
HK03104693.9A HK1053022B (zh) 2000-03-29 2003-07-02 Rf功率放大器的動態偏置

Publications (1)

Publication Number Publication Date
HK1065179A1 true HK1065179A1 (en) 2005-02-08

Family

ID=26888150

Family Applications (2)

Application Number Title Priority Date Filing Date
HK03104693.9A HK1053022B (zh) 2000-03-29 2003-07-02 Rf功率放大器的動態偏置
HK04106423A HK1065179A1 (en) 2000-03-29 2003-07-02 Dynamic bias for rf power amplifiers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
HK03104693.9A HK1053022B (zh) 2000-03-29 2003-07-02 Rf功率放大器的動態偏置

Country Status (15)

Country Link
US (4) US6684064B2 (fr)
EP (4) EP1269655B1 (fr)
JP (2) JP4824246B2 (fr)
KR (3) KR100659999B1 (fr)
CN (2) CN1209883C (fr)
AT (3) ATE266909T1 (fr)
AU (1) AU2001252992A1 (fr)
CA (1) CA2404824C (fr)
DE (3) DE60135689D1 (fr)
DK (2) DK1269655T3 (fr)
ES (2) ES2220766T3 (fr)
HK (2) HK1053022B (fr)
MX (1) MXPA02009432A (fr)
NO (1) NO20024619L (fr)
WO (1) WO2001073975A1 (fr)

Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6358504B1 (en) 1997-02-07 2002-03-19 Emisphere Technologies, Inc. Compounds and compositions for delivering active agents
US6377784B2 (en) * 1999-02-09 2002-04-23 Tropian, Inc. High-efficiency modulation RF amplifier
US6684064B2 (en) * 2000-03-29 2004-01-27 Interdigital Technology Corp. Dynamic bias for RF power amplifiers
US6735424B1 (en) * 2000-06-14 2004-05-11 The Regents Of The University Of California S-band low-noise amplifier with self-adjusting bias for improved power consumption and dynamic range in a mobile environment
GB2373417B (en) * 2001-03-13 2004-06-09 Tandberg Television Asa Satellite communication apparatus
US6785520B2 (en) * 2002-03-01 2004-08-31 Cognio, Inc. System and method for antenna diversity using equal power joint maximal ratio combining
US6687492B1 (en) 2002-03-01 2004-02-03 Cognio, Inc. System and method for antenna diversity using joint maximal ratio combining
US6862456B2 (en) * 2002-03-01 2005-03-01 Cognio, Inc. Systems and methods for improving range for multicast wireless communication
TWI226765B (en) * 2002-03-01 2005-01-11 Cognio Inc System and method for joint maximal ratio combining using time-domain signal processing
US20070060074A1 (en) * 2002-03-07 2007-03-15 Matsushita Electric Industrial Co., Ltd. High-efficiency modulating RF amplifier
US6871049B2 (en) * 2002-03-21 2005-03-22 Cognio, Inc. Improving the efficiency of power amplifiers in devices using transmit beamforming
US7103327B2 (en) * 2002-06-18 2006-09-05 Broadcom, Corp. Single side band transmitter having reduced DC offset
US7194237B2 (en) * 2002-07-30 2007-03-20 Ipr Licensing Inc. System and method for multiple-input multiple-output (MIMO) radio communication
US7277678B2 (en) * 2002-10-28 2007-10-02 Skyworks Solutions, Inc. Fast closed-loop power control for non-constant envelope modulation
US7099678B2 (en) * 2003-04-10 2006-08-29 Ipr Licensing, Inc. System and method for transmit weight computation for vector beamforming radio communication
GB2401264A (en) * 2003-04-30 2004-11-03 Motorola Inc Method of controlling the bias and quiescent current of an RF transmitter
KR100556909B1 (ko) * 2003-11-07 2006-03-03 엘지전자 주식회사 휴대폰의 파워앰프모듈 전원회로
JP4246622B2 (ja) * 2003-12-26 2009-04-02 古野電気株式会社 マイクロ波周波数変換器
JP4220435B2 (ja) * 2004-05-28 2009-02-04 株式会社東芝 無線通信システムおよび無線端末
JP2005354378A (ja) * 2004-06-10 2005-12-22 Hitachi Kokusai Electric Inc 送信装置
US20060068727A1 (en) * 2004-09-30 2006-03-30 Motorola, Inc. Method and system for dynamic range power control
KR20060029423A (ko) * 2004-10-01 2006-04-06 엘지전자 주식회사 피에이엠 구동전압 가변기능을 갖는 이동통신 단말기 및그 제어방법
US7756493B2 (en) * 2005-04-05 2010-07-13 Powerwave Technologies, Inc. Feed forward amplifier system and method using the pilot frequency from a positive feedback pilot generation and detection circuit to improve second loop convergence
US7250817B2 (en) * 2005-06-28 2007-07-31 Motorola, Inc. Linear power efficient radio frequency (RF) driver system and method with power level control
TWI332747B (en) * 2006-12-13 2010-11-01 Univ Nat Taiwan Bias circuits and signal amplifier circuits
FR2911447B1 (fr) * 2007-01-16 2011-12-16 St Microelectronics Sa Amplificateur de puissance reconfigurable et utilisation d'un tel amplificateur pour la realisation d'un etage d'amplification multistandard pour la telephonie mobile
EP2145195A4 (fr) * 2007-05-10 2012-06-06 Skyworks Solutions Inc Système et procédé de détection de puissance dans un amplificateur de puissance
US7489191B2 (en) 2007-06-08 2009-02-10 General Electric Company Circuit and method for reducing bias noise in amplifier circuits
US7826815B2 (en) * 2007-07-13 2010-11-02 Fairchild Semiconductor Corporation Dynamic selection of oscillation signal frequency for power converter
US7929915B2 (en) * 2007-09-28 2011-04-19 Verizon Patent And Licensing Inc. Method and system for measuring cross-polarization isolation value and 1 dB gain compression point
US8452243B2 (en) * 2008-05-08 2013-05-28 Skyworks Solutions, Inc. System and method for power detection in a power amplifier using an adjustable load
US7777573B2 (en) * 2008-05-29 2010-08-17 Himax Technologies Limited Operational amplifier having adjustable bias current and related source driver of display thereof
US8000665B2 (en) * 2008-10-28 2011-08-16 Freescale Semiconductor, Inc. Systems and methods for adjusting headroom of a power amplifier
US20110250853A1 (en) * 2010-04-09 2011-10-13 Andrea Camuffo Operating point setting of an amplifier
KR20120018266A (ko) * 2010-08-20 2012-03-02 삼성전자주식회사 직교 주파수 분할 다중 접속 방법을 사용하는 무선 통신 시스템에서 기지국의 전력 증폭기 소모 전력 제어 방법 및 장치
US8400218B2 (en) 2010-11-15 2013-03-19 Qualcomm, Incorporated Current mode power amplifier providing harmonic distortion suppression
US8854814B2 (en) * 2011-06-27 2014-10-07 Futurewei Technologies, Inc. Hybrid cooling design for modular systems
WO2013050085A1 (fr) * 2011-10-07 2013-04-11 Telefonaktiebolaget L M Ericsson (Publ) Appareil et procédé d'utilisation avec un réseau d'antennes
CN103631307B (zh) * 2013-08-06 2015-10-21 豪芯微电子科技（上海）有限公司 射频功率放大器的功率控制电路
CN104467745B (zh) 2013-09-19 2018-07-20 天工方案公司 动态误差向量幅度占空比校正
US9660600B2 (en) * 2013-12-23 2017-05-23 Skyworks Solutions, Inc. Dynamic error vector magnitude compensation
US9559646B2 (en) 2014-09-10 2017-01-31 Samsung Electronics Co., Ltd Apparatus and method for dynamically biased baseband current amplifier
CN107040220B (zh) * 2017-04-10 2020-11-13 捷开通讯(深圳)有限公司 调制功率放大器偏置的装置及方法
CN107994897B (zh) * 2017-11-27 2021-08-10 尚睿微电子（上海）有限公司 一种偏置电流控制电路、方法以及功率放大控制电路

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54104760A (en) * 1978-02-03 1979-08-17 Nec Corp Amplifier of low power consumption type
KR910007654B1 (ko) * 1989-04-26 1991-09-28 삼성전자 주식회사 이동식 무선전화기의 rf전력 제어회로
US5119042A (en) 1990-08-30 1992-06-02 Hughes Aircraft Company Solid state power amplifier with dynamically adjusted operating point
KR960000775B1 (ko) * 1990-10-19 1996-01-12 닛본덴기 가부시끼가이샤 고주파 전력 증폭기의 출력레벨 제어회로
US5101173A (en) * 1990-11-28 1992-03-31 The United States Of America As Represented By The Secretary Of The Air Force Stored program controlled module amplifier bias and amplitude/phase compensation apparatus
JPH05119042A (ja) * 1991-10-24 1993-05-14 Analytical Instr:Kk 自動分析システム
JPH05129860A (ja) * 1991-11-08 1993-05-25 Oki Electric Ind Co Ltd 電力増幅装置及び送信装置
JPH07170202A (ja) * 1993-12-15 1995-07-04 Hitachi Ltd 送信回路
FR2716313B1 (fr) 1994-02-11 1996-04-12 Alcatel Mobile Comm France Dispositif de commande de la polarisation d'un amplificateur.
US5452473A (en) * 1994-02-28 1995-09-19 Qualcomm Incorporated Reverse link, transmit power correction and limitation in a radiotelephone system
JP3192323B2 (ja) * 1994-07-29 2001-07-23 沖電気工業株式会社 電力制御回路
US5608348A (en) * 1995-04-14 1997-03-04 Delco Electronics Corporation Binary programmable current mirror
SE506842C2 (sv) * 1996-06-28 1998-02-16 Ericsson Telefon Ab L M Anordning och förfarande vid radiosändare för styrning av effektförstärkare
EP0856955A3 (fr) * 1997-01-29 2000-09-06 YRP Mobile Telecommunications Key Technology Research Laboratories Co., Ltd. Régulation de puissance dans un système AMDC
SE520227C2 (sv) 1997-04-18 2003-06-10 Ericsson Telefon Ab L M Effektförstärkarkrets, samt förfarande för reglering och användning av en sådan krets
JP3150090B2 (ja) * 1997-10-28 2001-03-26 埼玉日本電気株式会社 移動通信機器
JP2926576B1 (ja) * 1998-04-03 1999-07-28 埼玉日本電気株式会社 無線電話装置
US6008698A (en) * 1998-05-18 1999-12-28 Omnipoint Corporation Amplifier with dynamically adaptable supply current
JP3240998B2 (ja) * 1998-07-27 2001-12-25 日本電気株式会社 送信パワー制御回路
US6321072B1 (en) * 1998-08-31 2001-11-20 Conexant Systems, Inc. Distortion control feedback loop utilizing a non-linear transfer function generator to compensate for non-linearities in a transmitter circuit
US6466772B1 (en) * 1998-09-25 2002-10-15 Skyworks Solutions, Inc. Apparatus and method for improving power control loop linearity
US6178313B1 (en) * 1998-12-31 2001-01-23 Nokia Mobile Phones Limited Control of gain and power consumption in a power amplifier
US6684064B2 (en) * 2000-03-29 2004-01-27 Interdigital Technology Corp. Dynamic bias for RF power amplifiers
US6735424B1 (en) * 2000-06-14 2004-05-11 The Regents Of The University Of California S-band low-noise amplifier with self-adjusting bias for improved power consumption and dynamic range in a mobile environment
FI114666B (fi) * 2000-10-31 2004-11-30 Elektrobit Oy Linearisointimenetelmä ja vahvistinjärjestely

Also Published As

Publication number Publication date
CN1209883C (zh) 2005-07-06
ES2220766T3 (es) 2004-12-16
AU2001252992A1 (en) 2001-10-08
EP1398886A3 (fr) 2005-08-24
JP4824246B2 (ja) 2011-11-30
JP2009077439A (ja) 2009-04-09
US20010041547A1 (en) 2001-11-15
HK1053022A1 (en) 2003-10-03
KR100703649B1 (ko) 2007-04-09
DE60103266T2 (de) 2005-05-25
ATE407476T1 (de) 2008-09-15
CA2404824A1 (fr) 2001-10-04
CN100472945C (zh) 2009-03-25
KR100558105B1 (ko) 2006-03-10
EP1693955A3 (fr) 2006-09-13
KR20020084264A (ko) 2002-11-04
US7502600B2 (en) 2009-03-10
DE60103266D1 (de) 2004-06-17
CN1681198A (zh) 2005-10-12
ATE266909T1 (de) 2004-05-15
CA2404824C (fr) 2006-08-22
MXPA02009432A (es) 2003-03-10
EP1693955A2 (fr) 2006-08-23
KR20060039454A (ko) 2006-05-08
US7010282B2 (en) 2006-03-07
US20040106385A1 (en) 2004-06-03
US20090264145A1 (en) 2009-10-22
EP1693955B1 (fr) 2008-09-03
EP1990912A3 (fr) 2011-01-19
DE60120788T2 (de) 2007-03-29
CN1429436A (zh) 2003-07-09
EP1269655A1 (fr) 2003-01-02
EP1990912A2 (fr) 2008-11-12
ATE330377T1 (de) 2006-07-15
NO20024619D0 (no) 2002-09-26
US20060166630A1 (en) 2006-07-27
US6684064B2 (en) 2004-01-27
JP2004500781A (ja) 2004-01-08
HK1053022B (zh) 2004-11-26
DE60135689D1 (de) 2008-10-16
DK1269655T3 (da) 2004-09-06
DE60120788D1 (de) 2006-07-27
KR20050046017A (ko) 2005-05-17
EP1398886B1 (fr) 2006-06-14
ES2263898T3 (es) 2006-12-16
KR100659999B1 (ko) 2006-12-22
EP1269655B1 (fr) 2004-05-12
WO2001073975A1 (fr) 2001-10-04
NO20024619L (no) 2002-11-05
EP1398886A2 (fr) 2004-03-17
DK1398886T3 (da) 2006-10-16

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