WO2007033646A3 - Feedback correction for switching amplifiers - Google Patents

Feedback correction for switching amplifiers Download PDF

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Publication number
WO2007033646A3
WO2007033646A3 PCT/DE2006/001625 DE2006001625W WO2007033646A3 WO 2007033646 A3 WO2007033646 A3 WO 2007033646A3 DE 2006001625 W DE2006001625 W DE 2006001625W WO 2007033646 A3 WO2007033646 A3 WO 2007033646A3
Authority
WO
WIPO (PCT)
Prior art keywords
switching
switching amplifiers
amplifiers
switching amplifier
feedback
Prior art date
Application number
PCT/DE2006/001625
Other languages
German (de)
French (fr)
Other versions
WO2007033646A2 (en
Inventor
Stefan Wehmeier
Original Assignee
Conta Gmbh
Stefan Wehmeier
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 Conta Gmbh, Stefan Wehmeier filed Critical Conta Gmbh
Publication of WO2007033646A2 publication Critical patent/WO2007033646A2/en
Publication of WO2007033646A3 publication Critical patent/WO2007033646A3/en

Links

Classifications

    • 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
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/351—Pulse width modulation being used in an amplifying circuit

Abstract

The invention relates to a method for correction of feedback for switching amplifiers, in which the output signal is returned to the switching amplifier in order to stabilize the characteristics of the switching amplifier and a free-running switching amplifier and a clocked switching amplifier in each of which the feedback is corrected by said method. Free-running switching amplifiers can be achieved by the present correction in which the operating frequency is held constant over the whole range of modulation factor. The transfer function is linearised in clocked switching amplifiers with harmonics reduction measures. Switching amplifiers are disclosed with good electromagnetic compatibility and no distortion.
PCT/DE2006/001625 2005-09-19 2006-09-13 Feedback correction for switching amplifiers WO2007033646A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510044710 DE102005044710B4 (en) 2005-09-19 2005-09-19 Feedback correction for switching amplifiers and use
DE102005044710.4 2005-09-19

Publications (2)

Publication Number Publication Date
WO2007033646A2 WO2007033646A2 (en) 2007-03-29
WO2007033646A3 true WO2007033646A3 (en) 2007-08-09

Family

ID=37622206

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2006/001625 WO2007033646A2 (en) 2005-09-19 2006-09-13 Feedback correction for switching amplifiers

Country Status (2)

Country Link
DE (1) DE102005044710B4 (en)
WO (1) WO2007033646A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11340280B2 (en) 2020-10-07 2022-05-24 Rohde & Schwarz Gmbh & Co. Kg System and method for performing electromagnetic compatibility measurements

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5160896A (en) * 1992-02-18 1992-11-03 Harman International Industries, Incorporated Class D amplifier
US5345165A (en) * 1984-11-02 1994-09-06 Bose Corporation Frequency-stabilized two-state modulation using hysteresis control
EP1657815A1 (en) * 2004-11-12 2006-05-17 Dialog Semiconductor GmbH Frequency stabilization technique for self oscillating modulator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4186437A (en) * 1978-05-03 1980-01-29 California Institute Of Technology Push-pull switching power amplifier
DE69418371T2 (en) * 1993-03-17 1999-10-21 Toshiba Kawasaki Kk Circuit for pulse width modulation
DE19838765A1 (en) * 1998-08-26 2000-05-11 Elbo Gmbh Self-oscillating digital amplifier with delay-free digital negative feedback, without push-pull distortions

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5345165A (en) * 1984-11-02 1994-09-06 Bose Corporation Frequency-stabilized two-state modulation using hysteresis control
US5160896A (en) * 1992-02-18 1992-11-03 Harman International Industries, Incorporated Class D amplifier
EP1657815A1 (en) * 2004-11-12 2006-05-17 Dialog Semiconductor GmbH Frequency stabilization technique for self oscillating modulator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SAX H: "SCHALTEN STATT HEIZEN HIFI-AUDIO-ENDSTUFE MIT PULSWEITENMODULATION", ELEKTRONIK, WEKA FACHZEITSCHRIFTENVERLAG, POING, DE, vol. 37, no. 23, 11 November 1988 (1988-11-11), pages 112 - 116, XP000096719, ISSN: 0013-5658 *

Also Published As

Publication number Publication date
DE102005044710B4 (en) 2011-07-07
DE102005044710A1 (en) 2007-03-22
WO2007033646A2 (en) 2007-03-29

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121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase

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