WO2001003303A3 - Method and apparatus for efficient mixed signal processing in a digital amplifier - Google Patents

Method and apparatus for efficient mixed signal processing in a digital amplifier Download PDF

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Publication number
WO2001003303A3
WO2001003303A3 PCT/US2000/017596 US0017596W WO0103303A3 WO 2001003303 A3 WO2001003303 A3 WO 2001003303A3 US 0017596 W US0017596 W US 0017596W WO 0103303 A3 WO0103303 A3 WO 0103303A3
Authority
WO
WIPO (PCT)
Prior art keywords
noise
shaping
bridge
output
comparator
Prior art date
Application number
PCT/US2000/017596
Other languages
French (fr)
Other versions
WO2001003303A2 (en
WO2001003303A9 (en
Inventor
Erlend Olson
Ion Opris
Original Assignee
Broadcom Corp
Erlend Olson
Ion Opris
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 Broadcom Corp, Erlend Olson, Ion Opris filed Critical Broadcom Corp
Priority to EP00944903A priority Critical patent/EP1192717B1/en
Priority to DE60013602T priority patent/DE60013602T2/en
Priority to AT00944903T priority patent/ATE275777T1/en
Priority to AU58928/00A priority patent/AU5892800A/en
Publication of WO2001003303A2 publication Critical patent/WO2001003303A2/en
Publication of WO2001003303A3 publication Critical patent/WO2001003303A3/en
Publication of WO2001003303A9 publication Critical patent/WO2001003303A9/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3002—Conversion to or from differential modulation
    • H03M7/3004—Digital delta-sigma modulation
    • H03M7/3006—Compensating for, or preventing of, undesired influence of physical parameters
    • 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
    • H03F3/2173—Class D power amplifiers; Switching amplifiers of the bridge type
    • 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
    • H03M3/458—Analogue/digital converters using delta-sigma modulation as an intermediate step
    • H03M3/494—Sampling or signal conditioning arrangements specially adapted for delta-sigma type analogue/digital conversion systems
    • H03M3/496—Details of sampling arrangements or methods
    • 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
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3002—Conversion to or from differential modulation
    • H03M7/3004—Digital delta-sigma modulation
    • H03M7/3015—Structural details of digital delta-sigma modulators
    • H03M7/3031—Structural details of digital delta-sigma modulators characterised by the order of the loop filter, e.g. having a first order loop filter in the feedforward path

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Amplifiers (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Static Random-Access Memory (AREA)

Abstract

A system and method creating a highly efficient digital amplifier which can take either analog or digital inputs, and produce a high power accurate representation of the input to drive speakers or other low impedance load is described. The system employs a transition detector and delay unit which allows the comparator of the signal modulator to ignore its inputs for a pre-determined number of subsequent clock cycles once an output transition has been detected. Through the use of faster clocks and variable clock cycle skips upon the comparator's output transition, finer resolution of the feedback's clock period for noise-shaping purposes is achieved. Finer resolution of the clock period allows the present invention to employ a more aggressive noise-shaping than previously possible. In another aspect of the invention, additional delta-sigma modulator noise suppression is obtained by using the common bridge implementation of the power output stage with the improvement of configuring the bridge to create a 3-state condition instead of the conventional 2 states. By controlling the two halves of the bridge independently of one another, an output with 3 states makes for improved noise shaping performance.
PCT/US2000/017596 1999-07-01 2000-06-27 Method and apparatus for efficient mixed signal processing in a digital amplifier WO2001003303A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP00944903A EP1192717B1 (en) 1999-07-01 2000-06-27 Method and apparatus for efficient mixed signal processing in a digital amplifier
DE60013602T DE60013602T2 (en) 1999-07-01 2000-06-27 METHOD AND DEVICE FOR EFFICIENT PROCESSING OF MIXED SIGNALS INTO A DIGITAL AMPLIFIER
AT00944903T ATE275777T1 (en) 1999-07-01 2000-06-27 METHOD AND DEVICE FOR EFFICIENTLY PROCESSING MIXED SIGNALS INTO A DIGITAL AMPLIFIER
AU58928/00A AU5892800A (en) 1999-07-01 2000-06-27 Method and apparatus for efficient mixed signal processing in a digital amplifier

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/346,361 1999-07-01
US09/346,361 US6791404B1 (en) 1999-07-01 1999-07-01 Method and apparatus for efficient mixed signal processing in a digital amplifier

Publications (3)

Publication Number Publication Date
WO2001003303A2 WO2001003303A2 (en) 2001-01-11
WO2001003303A3 true WO2001003303A3 (en) 2002-01-10
WO2001003303A9 WO2001003303A9 (en) 2002-04-25

Family

ID=23359039

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/017596 WO2001003303A2 (en) 1999-07-01 2000-06-27 Method and apparatus for efficient mixed signal processing in a digital amplifier

Country Status (6)

Country Link
US (5) US6791404B1 (en)
EP (1) EP1192717B1 (en)
AT (1) ATE275777T1 (en)
AU (1) AU5892800A (en)
DE (1) DE60013602T2 (en)
WO (1) WO2001003303A2 (en)

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US6791404B1 (en) * 1999-07-01 2004-09-14 Broadcom Corporation Method and apparatus for efficient mixed signal processing in a digital amplifier
US6975682B2 (en) * 2001-06-12 2005-12-13 Raytheon Company Multi-bit delta-sigma analog-to-digital converter with error shaping
KR100916007B1 (en) * 2001-11-30 2009-09-10 소니온 에이/에스 A high efficiency driver for miniature loudspeakers
DE10200004A1 (en) * 2002-01-02 2003-07-17 Philips Intellectual Property Electronic circuit and method for operating a high pressure lamp
US9137035B2 (en) 2002-05-09 2015-09-15 Netstreams Llc Legacy converter and controller for an audio video distribution system
KR100966415B1 (en) * 2002-05-09 2010-06-28 넷스트림스 엘엘씨 Audio network distribution system
DE10308946B4 (en) * 2003-02-28 2006-02-16 Infineon Technologies Ag line driver
US6998910B2 (en) * 2004-01-22 2006-02-14 Texas Instruments Incorporated Amplifier using delta-sigma modulation
EP1716723B1 (en) 2004-02-08 2008-11-05 Widex A/S Output stage for a hearing aid and method of driving output stage
JP2006173819A (en) * 2004-12-14 2006-06-29 Sharp Corp Switching amplifier
GB2449591B (en) * 2005-01-17 2009-03-18 Wolfson Microelectronics Plc Pulse width modulator quantisation circuit
DE102005006858A1 (en) * 2005-02-15 2006-09-07 Siemens Audiologische Technik Gmbh Hearing aid with an output amplifier comprising a sigma-delta modulator
JP4675138B2 (en) * 2005-04-14 2011-04-20 シャープ株式会社 Switching amplifier
US7576665B2 (en) * 2007-11-27 2009-08-18 Amx Llc System and method for receiving analog and digital input
US7969242B2 (en) * 2008-07-24 2011-06-28 Qualcomm Incorporated Switching power amplifier for quantized signals
US20100303046A1 (en) * 2009-05-27 2010-12-02 Netstreams, Llc Wireless video and audio network distribution system
US20110102395A1 (en) * 2009-11-04 2011-05-05 Himax Technologies Limited Method and system of controlling halt and resume of scanning an lcd
WO2011110218A1 (en) * 2010-03-09 2011-09-15 Widex A/S Two part hearing aid with databus and method of communicating between the parts
EP2421157A1 (en) * 2010-07-29 2012-02-22 SEMIKRON Elektronik GmbH & Co. KG Method for operating a delta-sigma converter
KR101853818B1 (en) * 2011-07-29 2018-06-15 삼성전자주식회사 Method for processing audio signal and apparatus for processing audio signal thereof
WO2014132683A1 (en) * 2013-02-28 2014-09-04 クラリオン株式会社 Digital amplifier, three-value signal output method, and speaker
DE102013105002A1 (en) * 2013-05-15 2014-11-20 Focke & Co. (Gmbh & Co. Kg) Method of handling containers, in particular boxes, for groups of articles, in particular packages
CN104883189B (en) * 2015-06-04 2018-05-25 福州大学 Include the cascade structure Sigma-Delta modulator in path between grade
US10797659B2 (en) * 2018-10-15 2020-10-06 Semiconductor Components Industried, Llc Audio amplifier having multiple sigma-delta modulators to drive an output load

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US5617058A (en) * 1995-11-13 1997-04-01 Apogee Technology, Inc. Digital signal processing for linearization of small input signals to a tri-state power switch
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Also Published As

Publication number Publication date
EP1192717B1 (en) 2004-09-08
EP1192717A2 (en) 2002-04-03
US20050030093A1 (en) 2005-02-10
US20040239542A1 (en) 2004-12-02
WO2001003303A2 (en) 2001-01-11
US6791404B1 (en) 2004-09-14
US6933778B2 (en) 2005-08-23
US6765518B2 (en) 2004-07-20
US6933870B2 (en) 2005-08-23
US20010005174A1 (en) 2001-06-28
ATE275777T1 (en) 2004-09-15
AU5892800A (en) 2001-01-22
DE60013602D1 (en) 2004-10-14
US6864815B2 (en) 2005-03-08
DE60013602T2 (en) 2005-09-22
US20020186155A1 (en) 2002-12-12

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