WO2004062089A3 - Delta-sigma amplifiers with output stage supply voltage variation compensation and methods and digital amplifier systems using the same - Google Patents

Delta-sigma amplifiers with output stage supply voltage variation compensation and methods and digital amplifier systems using the same Download PDF

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Publication number
WO2004062089A3
WO2004062089A3 PCT/US2003/039267 US0339267W WO2004062089A3 WO 2004062089 A3 WO2004062089 A3 WO 2004062089A3 US 0339267 W US0339267 W US 0339267W WO 2004062089 A3 WO2004062089 A3 WO 2004062089A3
Authority
WO
WIPO (PCT)
Prior art keywords
delta
output stage
methods
supply voltage
same
Prior art date
Application number
PCT/US2003/039267
Other languages
French (fr)
Other versions
WO2004062089A2 (en
Inventor
Jack Andersen
John Laurence Melanson
Original Assignee
Cirrus Logic Inc
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 Cirrus Logic Inc filed Critical Cirrus Logic Inc
Priority to EP03814698A priority Critical patent/EP1579570B1/en
Priority to JP2004565333A priority patent/JP4157098B2/en
Priority to AU2003296449A priority patent/AU2003296449A1/en
Priority to DE60306685T priority patent/DE60306685T2/en
Publication of WO2004062089A2 publication Critical patent/WO2004062089A2/en
Publication of WO2004062089A3 publication Critical patent/WO2004062089A3/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
    • 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

Abstract

A delta-sigma modulator (101) for driving an output stage is disclosed. The delta-sigma modulator (101) operates between first and second voltages and includes a loop filter (202), a quantizer (204), and a feedback loop coupling an output of the quantizer (204) and an input of the loop filter (202). The feedback loop includes compensation circuitry for compensating for variations in the first and second voltages in response to a measured average of the first and second voltages and a measured difference between the first and second voltages. Measuring circuitry measures the average and the difference of the first and second voltages.
PCT/US2003/039267 2002-12-26 2003-12-10 Delta-sigma amplifiers with output stage supply voltage variation compensation and methods and digital amplifier systems using the same WO2004062089A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP03814698A EP1579570B1 (en) 2002-12-26 2003-12-10 Delta-sigma amplifiers with output stage supply voltage variation compensation and methods and digital amplifier systems using the same
JP2004565333A JP4157098B2 (en) 2002-12-26 2003-12-10 Delta-sigma amplifier with output stage supply voltage variation compensation and method and digital amplifier system using the same
AU2003296449A AU2003296449A1 (en) 2002-12-26 2003-12-10 Delta-sigma amplifiers with output stage supply voltage variation compensation and methods and digital amplifier systems using the same
DE60306685T DE60306685T2 (en) 2002-12-26 2003-12-10 DELTA SIGMA AMPLIFIER WITH OUTPUT LEVEL SUPPLY VOLTAGE VARIATION COMPENSATION AND METHOD AND DIGITAL AMPLIFIER SYSTEMS THEREWITH

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/329,852 2002-12-26
US10/329,852 US6741123B1 (en) 2002-12-26 2002-12-26 Delta-sigma amplifiers with output stage supply voltage variation compensation and methods and digital amplifier systems using the same

Publications (2)

Publication Number Publication Date
WO2004062089A2 WO2004062089A2 (en) 2004-07-22
WO2004062089A3 true WO2004062089A3 (en) 2004-09-23

Family

ID=32312330

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/039267 WO2004062089A2 (en) 2002-12-26 2003-12-10 Delta-sigma amplifiers with output stage supply voltage variation compensation and methods and digital amplifier systems using the same

Country Status (8)

Country Link
US (2) US6741123B1 (en)
EP (1) EP1579570B1 (en)
JP (1) JP4157098B2 (en)
AT (1) ATE332588T1 (en)
AU (1) AU2003296449A1 (en)
DE (1) DE60306685T2 (en)
DK (1) DK1579570T3 (en)
WO (1) WO2004062089A2 (en)

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US8008902B2 (en) * 2008-06-25 2011-08-30 Cirrus Logic, Inc. Hysteretic buck converter having dynamic thresholds
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Also Published As

Publication number Publication date
AU2003296449A8 (en) 2004-07-29
DE60306685T2 (en) 2007-06-28
DK1579570T3 (en) 2006-10-30
JP2006512851A (en) 2006-04-13
EP1579570B1 (en) 2006-07-05
US20040228416A1 (en) 2004-11-18
ATE332588T1 (en) 2006-07-15
EP1579570A2 (en) 2005-09-28
US6943620B2 (en) 2005-09-13
DE60306685D1 (en) 2006-08-17
AU2003296449A1 (en) 2004-07-29
US6741123B1 (en) 2004-05-25
EP1579570A4 (en) 2006-01-11
JP4157098B2 (en) 2008-09-24
WO2004062089A2 (en) 2004-07-22

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