BR9703780A - Sistema amplificador - Google Patents

Sistema amplificador

Info

Publication number
BR9703780A
BR9703780A BR9703780A BR9703780A BR9703780A BR 9703780 A BR9703780 A BR 9703780A BR 9703780 A BR9703780 A BR 9703780A BR 9703780 A BR9703780 A BR 9703780A BR 9703780 A BR9703780 A BR 9703780A
Authority
BR
Brazil
Prior art keywords
amplifier system
amplifier
Prior art date
Application number
BR9703780A
Other languages
English (en)
Inventor
John Samuels
Original Assignee
Nokia Mobile Phones 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 Nokia Mobile Phones Ltd filed Critical Nokia Mobile Phones Ltd
Publication of BR9703780A publication Critical patent/BR9703780A/pt

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
    • 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
    • H03F1/02—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
    • 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
    • H03F2200/18—Indexing scheme relating to amplifiers the bias of the gate of a FET being controlled by a control signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/204—A hybrid coupler being used at the output of an amplifier circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Amplifiers (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Superheterodyne Receivers (AREA)
BR9703780A 1996-09-12 1997-09-10 Sistema amplificador BR9703780A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9619029A GB2317289B (en) 1996-09-12 1996-09-12 Amplifier system

Publications (1)

Publication Number Publication Date
BR9703780A true BR9703780A (pt) 1998-08-11

Family

ID=10799803

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9703780A BR9703780A (pt) 1996-09-12 1997-09-10 Sistema amplificador

Country Status (7)

Country Link
US (1) US5990746A (pt)
EP (1) EP0829954B1 (pt)
JP (1) JPH10107566A (pt)
KR (1) KR19980024549A (pt)
BR (1) BR9703780A (pt)
DE (1) DE69716547T2 (pt)
GB (1) GB2317289B (pt)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19831561A1 (de) * 1998-07-14 2000-01-20 Siemens Ag Schaltungsanordnung zum Erzeugen einer Hilfsgleichspnnung
FI106660B (fi) 1998-11-06 2001-03-15 Nokia Mobile Phones Ltd Menetelmä ja järjestely radiovastaanottimen linearisoimiseksi
JP3607855B2 (ja) 1999-07-19 2005-01-05 シャープ株式会社 電力増幅器
US6429746B1 (en) * 1999-12-07 2002-08-06 Nokia Networks Oy System and method for auto-bias of an amplifier
US6784748B1 (en) * 2000-02-24 2004-08-31 Skyworks Solutions, Inc. Power amplifying system with supply and bias enhancements
US6522197B2 (en) 2000-04-21 2003-02-18 Paradigm Wireless Systems, Inc. Method and apparatus for optimum biasing of cascaded MOSFET radio-frequency devices
JP2002280842A (ja) * 2001-03-21 2002-09-27 Hitachi Ltd 電力増幅器モジュール
ATE467263T1 (de) 2002-03-15 2010-05-15 Ericsson Telefon Ab L M R.f. ausgangsleistungsreglung
GB0209830D0 (en) * 2002-04-30 2002-06-05 Zarlink Semiconductor Ltd Circuit stage for radio frequency tuner and radio frequency tuner
US7805117B2 (en) * 2006-02-28 2010-09-28 Motorola, Inc. Method and apparatus for minimizing noise in a transmitter
US7864969B1 (en) * 2006-02-28 2011-01-04 National Semiconductor Corporation Adaptive amplifier circuitry for microphone array
US20100271119A1 (en) * 2006-10-23 2010-10-28 Walid Karoui Envelope detector, linearization circuit, amplifier circuit, method for detecting a modulation envelope and wireless communication unit
JP2012134612A (ja) * 2010-12-20 2012-07-12 Panasonic Corp 低雑音増幅器

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1155772A (en) * 1967-06-05 1969-06-18 Decca Ltd Improvements in Multistage Transistor Amplifiers
US3899743A (en) * 1974-01-07 1975-08-12 Gen Electric Biasing circuit for multistage transistor amplifiers
JPS54147762A (en) * 1978-05-11 1979-11-19 Seiko Instr & Electronics Ltd Agc circuit for receiver
JPS5564409A (en) * 1978-11-10 1980-05-15 Seiko Instr & Electronics Ltd Agc circuit of receiver
JPS5669907A (en) * 1979-11-12 1981-06-11 Nec Corp Linear amplifier
US4406019A (en) * 1981-11-16 1983-09-20 The Bendix Corporation Selectivity means in amplitude modulated radio receivers
FI80815C (fi) * 1988-09-13 1990-07-10 Nokia Mobira Oy Linearisation av en foerstaerkning i en rf-foerstaerkare.
US5241284A (en) * 1990-02-16 1993-08-31 Nokia Mobile Phones Ltd. Circuit arrangement for connecting RF amplifier and supply voltage filter
JPH05335855A (ja) * 1992-05-29 1993-12-17 Sanyo Electric Co Ltd ラジオ受信機
US5311143A (en) * 1992-07-02 1994-05-10 Motorola, Inc. RF amplifier bias control method and apparatus
US5410271A (en) * 1993-05-17 1995-04-25 Dan Inbar Non-linear feedback network providing a linear transfer function
US5493255A (en) * 1995-03-21 1996-02-20 Nokia Mobile Phones Ltd. Bias control circuit for an RF power amplifier

Also Published As

Publication number Publication date
GB2317289A (en) 1998-03-18
US5990746A (en) 1999-11-23
KR19980024549A (ko) 1998-07-06
GB2317289B (en) 2001-03-14
GB9619029D0 (en) 1996-10-23
DE69716547D1 (de) 2002-11-28
EP0829954B1 (en) 2002-10-23
JPH10107566A (ja) 1998-04-24
DE69716547T2 (de) 2003-06-12
EP0829954A1 (en) 1998-03-18

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Legal Events

Date Code Title Description
FB34 Technical and formal requirements: requirement - article 34 of industrial property law
B08F Application fees: application dismissed [chapter 8.6 patent gazette]

Free format text: REFERENTE A 7A E 8A ANUIDADES.