FI19992540A - Signaalin laadun parantaminen - Google Patents

Signaalin laadun parantaminen

Info

Publication number
FI19992540A
FI19992540A FI992540A FI19992540A FI19992540A FI 19992540 A FI19992540 A FI 19992540A FI 992540 A FI992540 A FI 992540A FI 19992540 A FI19992540 A FI 19992540A FI 19992540 A FI19992540 A FI 19992540A
Authority
FI
Finland
Prior art keywords
signal quality
quality improvement
improvement
signal
quality
Prior art date
Application number
FI992540A
Other languages
English (en)
Swedish (sv)
Other versions
FI107659B (fi
Inventor
Juha Nurminen
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
Priority to FI992540A priority Critical patent/FI107659B/fi
Priority to US09/716,881 priority patent/US6794930B1/en
Priority to EP00660209A priority patent/EP1104094A1/en
Publication of FI19992540A publication Critical patent/FI19992540A/fi
Application granted granted Critical
Publication of FI107659B publication Critical patent/FI107659B/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
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3264—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits in audio amplifiers
    • 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
    • H03F3/217—Class D power amplifiers; Switching amplifiers
    • H03F3/2175—Class D power amplifiers; Switching amplifiers using analogue-digital or digital-analogue conversion
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Amplifiers (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
FI992540A 1999-11-26 1999-11-26 Signaalin laadun parantaminen FI107659B (fi)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FI992540A FI107659B (fi) 1999-11-26 1999-11-26 Signaalin laadun parantaminen
US09/716,881 US6794930B1 (en) 1999-11-26 2000-11-20 Signal quality
EP00660209A EP1104094A1 (en) 1999-11-26 2000-11-21 Class D audio amplifier using feedback

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI992540 1999-11-26
FI992540A FI107659B (fi) 1999-11-26 1999-11-26 Signaalin laadun parantaminen

Publications (2)

Publication Number Publication Date
FI19992540A true FI19992540A (fi) 2001-05-27
FI107659B FI107659B (fi) 2001-09-14

Family

ID=8555656

Family Applications (1)

Application Number Title Priority Date Filing Date
FI992540A FI107659B (fi) 1999-11-26 1999-11-26 Signaalin laadun parantaminen

Country Status (3)

Country Link
US (1) US6794930B1 (fi)
EP (1) EP1104094A1 (fi)
FI (1) FI107659B (fi)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT410152B (de) * 2000-06-07 2003-02-25 Bier Guenther Ing Verfahren und vorrichtung zur erzeugung einer einem eingangs-datenstrom folgenden wechselspannung
US6977546B2 (en) * 2000-10-30 2005-12-20 Simon Fraser University High efficiency power amplifier systems and methods
JP2002230905A (ja) * 2001-01-29 2002-08-16 Niigata Seimitsu Kk 音声再生装置および方法
AT411415B (de) 2001-12-11 2003-12-29 Bier Guenther Ing Verfahren und vorrichtung zur erzeugung einer einem eingangs-datenstrom folgenden wechselspannung
CN1277351C (zh) * 2002-10-03 2006-09-27 三菱电机株式会社 D类放大器
JP3776392B2 (ja) * 2002-10-03 2006-05-17 三菱電機株式会社 Ｄ級増幅器
KR20050086704A (ko) * 2002-11-22 2005-08-30 코닌클리케 필립스 일렉트로닉스 엔.브이. 펄스 폭 변조된 잡음 형성기
EP1429454A1 (en) 2002-12-11 2004-06-16 Dialog Semiconductor GmbH Center of gravity compensation of class-D amplifier
US7259704B2 (en) 2003-03-28 2007-08-21 Ess Technology, Inc. System and method for compensating for error in a sigma delta circuit
DE602004008769T2 (de) * 2003-05-09 2008-01-24 Nxp B.V. Verfahren und Anordnung zur Einstellung der Sendeleistung eines Mobilübertragungsgerätes
US7058464B2 (en) * 2003-07-17 2006-06-06 Ess Technology, Inc. Device and method for signal processing
EP1499011A1 (en) * 2003-07-18 2005-01-19 Stichting Voor De Technische Wetenschappen Amplifying circuit comprising an envelope modulated limit cycles modulator circuit
US7023267B2 (en) * 2004-02-17 2006-04-04 Prophesi Technologies, Inc. Switching power amplifier using a frequency translating delta sigma modulator
US7352237B2 (en) * 2005-03-25 2008-04-01 Pulsewave Rf, Inc. Radio frequency power amplifier and corresponding method
US7262658B2 (en) * 2005-07-29 2007-08-28 Texas Instruments Incorporated Class-D amplifier system
US7116257B1 (en) 2005-09-26 2006-10-03 Ess Technology, Inc. Low noise digital to analog converter with audio applications
US7138935B1 (en) 2005-09-26 2006-11-21 Ess Technology, Inc. Low noise digital to signal interval converter with audio applications
US7570693B2 (en) * 2005-09-26 2009-08-04 Ess Technology, Inc. Low noise digital to pulse width modulated converter with audio applications
GB0614259D0 (en) * 2006-07-18 2006-08-30 Global Silicon Ltd A debouncing circuit
US7605653B2 (en) * 2006-08-16 2009-10-20 Intrinsix Corporation Sigma-delta based class D audio power amplifier with high power efficiency
US7612608B2 (en) * 2006-08-16 2009-11-03 Intrinsix Corporation Sigma-delta based Class D audio or servo amplifier with load noise shaping
NL1035333C2 (nl) 2008-04-23 2009-10-26 Hypex Electronics B V Werkwijze en stuurschakeling voor het sturen van pulsbreedtemodulatie.
US7948915B2 (en) * 2008-10-03 2011-05-24 The Boeing Company Removing time tag jitter and crossover distortion

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5115205A (en) * 1990-12-28 1992-05-19 Square D Company AC amplifier with automatic DC compensation
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
US5559467A (en) 1995-01-27 1996-09-24 The Regents Of The University Of California Digital, pulse width modulation audio power amplifier with noise and ripple shaping
US5594386A (en) 1995-04-21 1997-01-14 Sipex Corporation Pulse width modulated amplifier
DE19619208A1 (de) 1996-05-11 1997-11-13 Klugbauer Heilmeier Josef Digitaler Verstärker
KR100394846B1 (ko) * 1996-10-31 2003-08-19 방앤드오루프센아/에스 강화된 캐스케이드 제어 방법을 갖는 펄스 변조 전력증폭기
US5898340A (en) 1996-11-20 1999-04-27 Chatterjee; Manjirnath A. High power efficiency audio amplifier with digital audio and volume inputs
ATE279811T1 (de) 1997-04-02 2004-10-15 Olufsen Powerhouse A S Bang Pulzreferiertes steuerverfahren für verbesserte leistungsverstärkung eines pulsmodulierten signals
US6016075A (en) * 1997-06-04 2000-01-18 Lord Corporation Class-D amplifier input structure
US6373334B1 (en) * 2000-06-12 2002-04-16 Cirrus Logic, Inc. Real time correction of a digital PWM amplifier

Also Published As

Publication number Publication date
US6794930B1 (en) 2004-09-21
FI107659B (fi) 2001-09-14
EP1104094A1 (en) 2001-05-30

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Legal Events

Date Code Title Description
MA Patent expired