DK2845314T3 - CLASS-D AUDIO AMPLIFIER WITH ADJUSTABLE LOOP FILTER FEATURES - Google Patents

CLASS-D AUDIO AMPLIFIER WITH ADJUSTABLE LOOP FILTER FEATURES Download PDF

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Publication number
DK2845314T3
DK2845314T3 DK13720310.5T DK13720310T DK2845314T3 DK 2845314 T3 DK2845314 T3 DK 2845314T3 DK 13720310 T DK13720310 T DK 13720310T DK 2845314 T3 DK2845314 T3 DK 2845314T3
Authority
DK
Denmark
Prior art keywords
signal
class
output
pulse width
level
Prior art date
Application number
DK13720310.5T
Other languages
Danish (da)
English (en)
Inventor
Mikkel Høyerby
Original Assignee
Merus Audio Aps
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 Merus Audio Aps filed Critical Merus Audio Aps
Application granted granted Critical
Publication of DK2845314T3 publication Critical patent/DK2845314T3/en

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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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/4837—Flying capacitor converters
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
DK13720310.5T 2012-04-30 2013-04-24 CLASS-D AUDIO AMPLIFIER WITH ADJUSTABLE LOOP FILTER FEATURES DK2845314T3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261640565P 2012-04-30 2012-04-30
PCT/EP2013/058450 WO2013164229A1 (en) 2012-04-30 2013-04-24 Class d audio amplifier with adjustable loop filter characteristics

Publications (1)

Publication Number Publication Date
DK2845314T3 true DK2845314T3 (en) 2016-10-03

Family

ID=48289098

Family Applications (1)

Application Number Title Priority Date Filing Date
DK13720310.5T DK2845314T3 (en) 2012-04-30 2013-04-24 CLASS-D AUDIO AMPLIFIER WITH ADJUSTABLE LOOP FILTER FEATURES

Country Status (7)

Country Link
US (1) US9564862B2 (enExample)
EP (1) EP2845314B1 (enExample)
JP (1) JP6325526B2 (enExample)
KR (1) KR102068105B1 (enExample)
CN (1) CN104272589B (enExample)
DK (1) DK2845314T3 (enExample)
WO (1) WO2013164229A1 (enExample)

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Also Published As

Publication number Publication date
EP2845314A1 (en) 2015-03-11
KR102068105B1 (ko) 2020-01-20
US9564862B2 (en) 2017-02-07
US20150288335A1 (en) 2015-10-08
CN104272589B (zh) 2017-10-24
KR20150016301A (ko) 2015-02-11
CN104272589A (zh) 2015-01-07
JP6325526B2 (ja) 2018-05-16
JP2015515841A (ja) 2015-05-28
EP2845314B1 (en) 2016-06-29
WO2013164229A1 (en) 2013-11-07

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