TW200644408A - Class-D amplifier - Google Patents

Class-D amplifier

Info

Publication number
TW200644408A
TW200644408A TW095113032A TW95113032A TW200644408A TW 200644408 A TW200644408 A TW 200644408A TW 095113032 A TW095113032 A TW 095113032A TW 95113032 A TW95113032 A TW 95113032A TW 200644408 A TW200644408 A TW 200644408A
Authority
TW
Taiwan
Prior art keywords
amplifier
frequency path
class
waveform correction
low frequency
Prior art date
Application number
TW095113032A
Other languages
Chinese (zh)
Inventor
Horck Franciscus Bernardus Marie Van
Jorge Luiz Duarte
Original Assignee
Koninkl Philips Electronics Nv
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 Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Publication of TW200644408A publication Critical patent/TW200644408A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

The present invention relates to a closed loop class-D amplifier. The amplifier comprises a feedback arrangement with a low frequency path and a high frequency path. The high frequency path is used to obtain a selfosoillating condition in the amplifier and may contain passive components. The low frequency path comprises a low pass filter and a waveform correction circuit that reduces the amplifier distortion. Since the waveform correction circuit is applied in a low frequency path, the waveform correction unit may be realized using e.g. operational amplifiers that need not be rated for high frequencies. This allows a class-D amplifier to be realized with improved distortion and at a low cost.
TW095113032A 2005-04-15 2006-04-12 Class-D amplifier TW200644408A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05103027 2005-04-15

Publications (1)

Publication Number Publication Date
TW200644408A true TW200644408A (en) 2006-12-16

Family

ID=36619391

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095113032A TW200644408A (en) 2005-04-15 2006-04-12 Class-D amplifier

Country Status (2)

Country Link
TW (1) TW200644408A (en)
WO (1) WO2006109245A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE534502C2 (en) * 2009-09-14 2011-09-13 Abletec As Power Amplifier

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59814Y2 (en) * 1977-04-22 1984-01-11 ブライアン・ア−ネスト・アトウツド class D amplifier
JPS5639606A (en) * 1979-09-07 1981-04-15 Matsushita Electric Ind Co Ltd Self-excited type d-class amplifier
US5352986A (en) * 1993-01-22 1994-10-04 Digital Fidelity, Inc. Closed loop power controller
NL1011002C2 (en) * 1999-01-12 2000-07-20 Univ Eindhoven Tech Amplifier circuit.
US6441685B1 (en) * 2000-03-17 2002-08-27 Jl Audio, Inc. Amplifier circuit and method for providing negative feedback thereto
PL198380B1 (en) * 2002-01-21 2008-06-30 Adb Polska Sp Electroaciustic amplifier of dc class and method of compensating te influence of supply voltage on useful output signal of suc amplifier
KR100508062B1 (en) * 2002-10-10 2005-08-17 주식회사 디엠비테크놀로지 Digital audio amplifier including phase lead-lag compensator for increasing self-oscillation frequency
US7365598B2 (en) * 2003-05-09 2008-04-29 Danmarks Tekniske Universitet Global loop integrating modulator

Also Published As

Publication number Publication date
WO2006109245A1 (en) 2006-10-19

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