TW246754B - - Google Patents

Info

Publication number
TW246754B
TW246754B TW083100174A TW83100174A TW246754B TW 246754 B TW246754 B TW 246754B TW 083100174 A TW083100174 A TW 083100174A TW 83100174 A TW83100174 A TW 83100174A TW 246754 B TW246754 B TW 246754B
Authority
TW
Taiwan
Application number
TW083100174A
Other languages
Chinese (zh)
Original Assignee
Onkar S Modgil
Robert G Nelson
Margaret S Reif
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 Onkar S Modgil, Robert G Nelson, Margaret S Reif filed Critical Onkar S Modgil
Application granted granted Critical
Publication of TW246754B publication Critical patent/TW246754B/zh

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/30—Delta-sigma modulation
    • H03M3/39—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators
    • H03M3/412—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the number of quantisers and their type and resolution
    • H03M3/422—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only
    • H03M3/43—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only the quantiser being a single bit one
    • H03M3/432—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only the quantiser being a single bit one the quantiser being a pulse width modulation type analogue/digital converter, i.e. differential pulse width modulation
    • 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
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H03F1/083—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements in transistor 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/30—Delta-sigma modulation
    • H03M3/39—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators
    • H03M3/436—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the order of the loop filter, e.g. error feedback type
    • H03M3/438—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the order of the loop filter, e.g. error feedback type the modulator having a higher order loop filter in the feedforward path

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Amplifiers (AREA)
TW083100174A 1993-01-22 1994-01-11 TW246754B (OSRAM)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/007,521 US5352986A (en) 1993-01-22 1993-01-22 Closed loop power controller

Publications (1)

Publication Number Publication Date
TW246754B true TW246754B (OSRAM) 1995-05-01

Family

ID=21726692

Family Applications (1)

Application Number Title Priority Date Filing Date
TW083100174A TW246754B (OSRAM) 1993-01-22 1994-01-11

Country Status (5)

Country Link
US (2) US5352986A (OSRAM)
AU (1) AU6266894A (OSRAM)
CA (1) CA2154490C (OSRAM)
TW (1) TW246754B (OSRAM)
WO (1) WO1994017588A1 (OSRAM)

Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5352986A (en) * 1993-01-22 1994-10-04 Digital Fidelity, Inc. Closed loop power controller
DE19541832A1 (de) * 1995-11-10 1997-05-15 Thomson Brandt Gmbh Motorsteuerung für elektronisch kommutierende Gleichstrommotoren zur Kompensation von Drehmomenteinbrüchen
US5777512A (en) * 1996-06-20 1998-07-07 Tripath Technology, Inc. Method and apparatus for oversampled, noise-shaping, mixed-signal processing
ATE255784T1 (de) * 1996-10-31 2003-12-15 Bang & Olufsen As Pulsmodulierterkeistungsverstärker mit verbessertem kaskadiertem steuerungsverfahren
US5898340A (en) * 1996-11-20 1999-04-27 Chatterjee; Manjirnath A. High power efficiency audio amplifier with digital audio and volume inputs
DE69627043T2 (de) 1996-12-11 2004-01-15 Gn Netcom As Ballerup Klasse-d-verstärker
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
CA2285355C (en) 1997-04-02 2004-06-08 Karsten Nielsen Pulse referenced control method for enhanced power amplification of a pulse modulated signal
US5974089A (en) * 1997-07-22 1999-10-26 Tripath Technology, Inc. Method and apparatus for performance improvement by qualifying pulses in an oversampled noise-shaping signal processor
US5905407A (en) * 1997-07-30 1999-05-18 Motorola, Inc. High efficiency power amplifier using combined linear and switching techniques with novel feedback system
WO1999008378A2 (en) * 1997-08-12 1999-02-18 Koninklijke Philips Electronics N.V. Device for amplifying digital signals
US5909153A (en) * 1998-02-05 1999-06-01 Tripath Technology, Inc. Method and apparatus for compensating for delays in modulator loops
US6229390B1 (en) * 1999-03-09 2001-05-08 Tripath Technology, Inc. Methods and apparatus for noise shaping a mixed signal power output
EP1247328B1 (en) * 2000-01-03 2005-08-31 Harman International Industries, Incorporated Power converter with remote and local sensing feedback signals combined in a high-order constant-sum filter
US6753729B2 (en) * 2000-01-06 2004-06-22 Mitek Corporation Self-oscillating variable frequency closed loop Class D amplifier
US6414560B2 (en) 2000-03-03 2002-07-02 Tripath Technology, Inc. Loop delay compensation for a digital power amplifier
US6970503B1 (en) 2000-04-21 2005-11-29 National Semiconductor Corporation Apparatus and method for converting analog signal to pulse-width-modulated signal
AU2001280695A1 (en) * 2000-07-20 2002-02-05 Tripath Technology, Inc. Schemes for maximizing efficiency of power amplifier under power backoff conditions and reducing transmit-band noise floor and adjacent channel power
US6577189B2 (en) 2000-07-20 2003-06-10 Tripath Technology, Inc. Scheme for reducing transmit-band noise floor and adjacent channel power with power backoff
US6630899B2 (en) 2000-07-20 2003-10-07 Tripath Technology, Inc. Scheme for maximizing efficiency of power amplifier under power backoff conditions
CA2362104A1 (en) * 2000-10-30 2002-04-30 Simon Fraser University High efficiency power amplifier systems and methods
GB0110340D0 (en) * 2001-04-27 2001-06-20 Watts Robert D A signal processing circuit
US7200187B2 (en) * 2001-07-26 2007-04-03 O'brien Thomas J Modulator for digital amplifier
SE0203403D0 (sv) * 2002-11-15 2002-11-15 Bang & Olufsen Icepower As Pulse modulated power converter
US7038535B2 (en) * 2003-03-29 2006-05-02 Wai Laing Lee PWM digital amplifier with high-order loop filter
US7940033B2 (en) * 2003-04-22 2011-05-10 Aivaka, Inc. Control loop for switching power converters
WO2004100356A2 (en) * 2003-05-09 2004-11-18 Danmarks Tekniske Universitet Global loop integrating modulator
US20040232978A1 (en) * 2003-05-23 2004-11-25 Easson Craig Alexander Filterless class D amplifiers using spread spectrum PWM modulation
DE10358306B8 (de) 2003-12-08 2005-03-03 Coty B.V. Kosmetisches und dermatologisches Sauerstoff-Trägersystem, Verfahren zu dessen Herstellung sowie seine Verwendung
US7023267B2 (en) * 2004-02-17 2006-04-04 Prophesi Technologies, Inc. Switching power amplifier using a frequency translating delta sigma modulator
EP1759454A1 (en) * 2004-06-04 2007-03-07 Silocon Power Devices APS Power amplifier and pulse-width modulated amplifier
DE102004039459B4 (de) 2004-08-10 2011-06-16 Lancaster Group Gmbh Kosmetischer Wirkstoffkomplex zur Hautregenerierung
DE102004039631A1 (de) 2004-08-11 2006-03-02 Lancaster Group Gmbh Pigmenthaltiges kosmetisches Mittel mit Anti-Alterungswirkung für die Haut
US20060044057A1 (en) * 2004-08-26 2006-03-02 Rahmi Hezar Class-D amplifier having high order loop filtering
US7142047B2 (en) * 2004-11-29 2006-11-28 Tripath Technology, Inc. Offset cancellation in a switching amplifier
US7352237B2 (en) * 2005-03-25 2008-04-01 Pulsewave Rf, Inc. Radio frequency power amplifier and corresponding method
WO2006109245A1 (en) * 2005-04-15 2006-10-19 Koninklijke Philips Electronics N.V. Class-d amplifier
CN101512910A (zh) * 2005-04-28 2009-08-19 脉波Rf公司 射频功率放大器及采用多个反馈系统的方法
DE102005041052B3 (de) 2005-08-30 2007-03-29 Infineon Technologies Ag Verfahren zur Stabilitätskontrolle einer selbstschwingenden Treiberschaltung und selbstschwingende Treiberschaltung
DE102006013000A1 (de) * 2006-03-22 2007-09-27 Conti Temic Microelectronic Gmbh Verfahren und Anordnung zum digitalen Übermitteln eines analogen Messsignals
WO2007149346A2 (en) * 2006-06-16 2007-12-27 Pulsewave Rf, Inc. Radio frequency power amplifier and method using a controlled supply
DE102006058394B3 (de) 2006-12-07 2008-06-26 Coty Prestige Lancaster Group Gmbh Hautbräunungs-Basisformulierung mit DHA
JP5192050B2 (ja) * 2007-11-29 2013-05-08 ハインス イノベーションズ ビー．ブイ． 静電型スピーカシステム
US9509261B2 (en) * 2013-12-02 2016-11-29 Crestron Electronics Inc. Reduced crosstalk and matched output power audio amplifier

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59814Y2 (ja) * 1977-04-22 1984-01-11 ブライアン・ア−ネスト・アトウツド Ｄ級増幅器
JPS5967719A (ja) * 1982-10-09 1984-04-17 Nippon Gakki Seizo Kk パルス幅変調回路
US4724396A (en) * 1984-08-21 1988-02-09 Peavey Electronics Corporation Digital audio amplifier
US5218315A (en) * 1992-01-06 1993-06-08 Infinity Systems, Inc. Switching amplifier
US5352986A (en) * 1993-01-22 1994-10-04 Digital Fidelity, Inc. Closed loop power controller

Also Published As

Publication number Publication date
CA2154490A1 (en) 1994-08-04
WO1994017588A1 (en) 1994-08-04
AU6266894A (en) 1994-08-15
CA2154490C (en) 2003-03-25
US5352986A (en) 1994-10-04
US5521549A (en) 1996-05-28

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