FI116924B - Vahvistinjärjestelmä - Google Patents

Vahvistinjärjestelmä Download PDF

Info

Publication number
FI116924B
FI116924B FI992244A FI19992244A FI116924B FI 116924 B FI116924 B FI 116924B FI 992244 A FI992244 A FI 992244A FI 19992244 A FI19992244 A FI 19992244A FI 116924 B FI116924 B FI 116924B
Authority
FI
Finland
Prior art keywords
frequency
signal
amplifier
circuit
energy
Prior art date
Application number
FI992244A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI19992244A (fi
Inventor
Gregory French
Charles R Gentzler
Richard D Posner
Do B Shin
Bill Vassilakis
Original Assignee
Powerwave Technologies Inc
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 Powerwave Technologies Inc filed Critical Powerwave Technologies Inc
Publication of FI19992244A publication Critical patent/FI19992244A/fi
Application granted granted Critical
Publication of FI116924B publication Critical patent/FI116924B/fi

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
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • 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
    • H03F1/3223—Modifications of amplifiers to reduce non-linear distortion using feed-forward
    • H03F1/3229—Modifications of amplifiers to reduce non-linear distortion using feed-forward using a loop for error extraction and another loop for error subtraction
    • 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
    • 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
    • H03F1/42—Modifications of amplifiers to extend the bandwidth

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Amplifiers (AREA)
FI992244A 1998-10-19 1999-10-18 Vahvistinjärjestelmä FI116924B (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/174,691 US6140874A (en) 1998-10-19 1998-10-19 Amplification system having mask detection and bias compensation
US17469198 1998-10-19

Publications (2)

Publication Number Publication Date
FI19992244A FI19992244A (fi) 2000-04-19
FI116924B true FI116924B (fi) 2006-03-31

Family

ID=22637140

Family Applications (1)

Application Number Title Priority Date Filing Date
FI992244A FI116924B (fi) 1998-10-19 1999-10-18 Vahvistinjärjestelmä

Country Status (5)

Country Link
US (1) US6140874A (ko)
EP (1) EP0996224B1 (ko)
KR (1) KR100429962B1 (ko)
CA (1) CA2286544C (ko)
FI (1) FI116924B (ko)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6493543B1 (en) * 1998-10-19 2002-12-10 Powerwave Technologies, Inc. Multichannel amplification system using mask detection
US6545487B1 (en) * 2000-08-24 2003-04-08 Lucent Technologies Inc. System and method for producing an amplified signal with reduced distortion
US6563385B2 (en) 2001-04-18 2003-05-13 Xicor, Inc. Amplifier bias control circuit
JP3664990B2 (ja) 2001-04-25 2005-06-29 株式会社東芝 高周波回路及び通信システム
WO2003001662A1 (en) 2001-06-22 2003-01-03 Telefonaktiebolaget Lm Ericsson (Publ) Gain control of a power amplifier
US7243062B2 (en) * 2001-10-25 2007-07-10 Canon Kabushiki Kaisha Audio segmentation with energy-weighted bandwidth bias
US6812786B2 (en) 2002-04-11 2004-11-02 Andrew Corporation Zero-bias bypass switching circuit using mismatched 90 degrees hybrid
US6700439B2 (en) 2002-04-11 2004-03-02 Andrew Corporation Zero-bias bypass switch
KR20050084186A (ko) * 2002-12-09 2005-08-26 프리스케일 세미컨덕터, 인크. 판정 피드 포워드 등화기 시스템 및 방법
US7038540B2 (en) * 2003-02-14 2006-05-02 Powerwave Technologies, Inc. Enhanced efficiency feed forward power amplifier utilizing reduced cancellation bandwidth and small error amplifier
GB0401407D0 (en) * 2004-01-23 2004-02-25 Koninkl Philips Electronics Nv Improvements in or relating to passive filters
US7486939B2 (en) * 2005-06-21 2009-02-03 Motorola, Inc. Apparatus for removing distortions created by an amplifier
US20060291384A1 (en) * 2005-06-28 2006-12-28 Harris John M System and method for discarding packets
US7634198B2 (en) * 2006-06-21 2009-12-15 Emcore Corporation In-line distortion cancellation circuits for linearization of electronic and optical signals with phase and frequency adjustment
US7889810B2 (en) * 2006-12-15 2011-02-15 Pine Valley Investments, Inc. Method and apparatus for a nonlinear feedback control system
US8036260B2 (en) 2007-08-30 2011-10-11 Freescale Semiconductor, Inc. System and method for equalizing an incoming signal
US8606116B2 (en) * 2011-01-13 2013-12-10 Applied Optoelectronics, Inc. System and method for distortion compensation in response to frequency detection
US9031567B2 (en) * 2012-12-28 2015-05-12 Spreadtrum Communications Usa Inc. Method and apparatus for transmitter optimization based on allocated transmission band
WO2018182508A1 (en) * 2017-03-31 2018-10-04 Agency For Science, Technology And Research Method and apparatus for tuning a radio frequency predistorter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5130663A (en) * 1991-04-15 1992-07-14 Motorola, Inc. Feed forward amplifier network with frequency swept pilot tone
JP3342746B2 (ja) * 1993-06-30 2002-11-11 富士通株式会社 線形増幅器
US5485120A (en) * 1994-07-28 1996-01-16 Aval Communications Inc. Feed-forward power amplifier system with adaptive control and control method
WO1997008822A1 (en) * 1995-08-23 1997-03-06 Motorola Inc. Wideband power amplifier control systems
US5892397A (en) * 1996-03-29 1999-04-06 Spectrian Adaptive compensation of RF amplifier distortion by injecting predistortion signal derived from respectively different functions of input signal amplitude
US5808512A (en) * 1997-01-31 1998-09-15 Ophir Rf, Inc. Feed forward amplifiers and methods
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
US5912586A (en) * 1997-12-23 1999-06-15 Motorola, Inc. Feed forward amplifier with digital intermodulation control

Also Published As

Publication number Publication date
KR100429962B1 (ko) 2004-05-03
CA2286544A1 (en) 2000-04-19
KR20000029151A (ko) 2000-05-25
FI19992244A (fi) 2000-04-19
CA2286544C (en) 2010-05-11
EP0996224B1 (en) 2004-03-03
EP0996224A1 (en) 2000-04-26
US6140874A (en) 2000-10-31

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