SE9701986D0 - Anordning och förfarande för reducering av period iskt brus i en sigma-delta modulator - Google Patents

Anordning och förfarande för reducering av period iskt brus i en sigma-delta modulator

Info

Publication number
SE9701986D0
SE9701986D0 SE9701986A SE9701986A SE9701986D0 SE 9701986 D0 SE9701986 D0 SE 9701986D0 SE 9701986 A SE9701986 A SE 9701986A SE 9701986 A SE9701986 A SE 9701986A SE 9701986 D0 SE9701986 D0 SE 9701986D0
Authority
SE
Sweden
Prior art keywords
sigma
delta modulator
periodic noise
reducing periodic
constituted
Prior art date
Application number
SE9701986A
Other languages
English (en)
Other versions
SE9701986L (sv
SE509408C2 (sv
Inventor
Mats Fraennhagen
Per Henrik Fremrot
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to SE9701986A priority Critical patent/SE509408C2/sv
Publication of SE9701986D0 publication Critical patent/SE9701986D0/sv
Priority to BR9809163-8A priority patent/BR9809163A/pt
Priority to CO98029413A priority patent/CO4790202A1/es
Priority to KR19997011091A priority patent/KR20010013111A/ko
Priority to JP50058799A priority patent/JP4027434B2/ja
Priority to CN98805577A priority patent/CN1260913A/zh
Priority to US09/084,650 priority patent/US6175321B1/en
Priority to EEP199900536A priority patent/EE03500B1/xx
Priority to EP98926008A priority patent/EP1080534B1/en
Priority to PCT/SE1998/000990 priority patent/WO1998054840A2/en
Priority to AU77938/98A priority patent/AU751275B2/en
Priority to ARP980102466A priority patent/AR012873A1/es
Publication of SE9701986L publication Critical patent/SE9701986L/sv
Publication of SE509408C2 publication Critical patent/SE509408C2/sv

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
    • H03M7/3008—Compensating for, or preventing of, undesired influence of physical parameters by averaging out the errors, e.g. using dither
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/02—Delta modulation, i.e. one-bit differential modulation
    • 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
    • H03M7/302—Structural details of digital delta-sigma modulators characterised by the number of quantisers and their type and resolution
    • H03M7/3024—Structural details of digital delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only
    • H03M7/3028—Structural details of digital 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
    • H03M7/3033—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 the modulator having a higher order loop filter in the feedforward path, e.g. with distributed feedforward inputs
    • H03M7/304—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 the modulator having a higher order loop filter in the feedforward path, e.g. with distributed feedforward inputs with distributed feedback, i.e. with feedback paths from the quantiser output to more than one filter stage

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
SE9701986A 1997-05-27 1997-05-27 Anordning och förfarande för reducering av periodiskt brus i en sigma-delta modulator SE509408C2 (sv)

Priority Applications (12)

Application Number Priority Date Filing Date Title
SE9701986A SE509408C2 (sv) 1997-05-27 1997-05-27 Anordning och förfarande för reducering av periodiskt brus i en sigma-delta modulator
AU77938/98A AU751275B2 (en) 1997-05-27 1998-05-26 Apparatus and method for the reduction of periodic noise in a sigma-delta modulator
US09/084,650 US6175321B1 (en) 1997-05-27 1998-05-26 Apparatus and method for the reduction of periodic noise in a sigma-delta modulator
CO98029413A CO4790202A1 (es) 1997-05-27 1998-05-26 Aparato y metodo para la reduccion de ruido periodico en un modulador sigma-delta
KR19997011091A KR20010013111A (ko) 1997-05-27 1998-05-26 시그마-델타 변조기에서 주기적 잡음을 감소하는 장치 및방법
JP50058799A JP4027434B2 (ja) 1997-05-27 1998-05-26 シグマ・デルタ変調器内の周期雑音を低減するための装置並びに方法
CN98805577A CN1260913A (zh) 1997-05-27 1998-05-26 降低在σ－δ调制器中周期性噪声的设备与方法
BR9809163-8A BR9809163A (pt) 1997-05-27 1998-05-26 Processo e aparelho para modulação sigma-delta, e, processo e aparelho para conversão digital/ analógica
EEP199900536A EE03500B1 (et) 1997-05-27 1998-05-26 Seade ja meetod perioodilise müra vähendamiseks sigma-delta modulaatoris
EP98926008A EP1080534B1 (en) 1997-05-27 1998-05-26 Apparatus and method for the reduction of periodic noise in a sigma-delta modulator
PCT/SE1998/000990 WO1998054840A2 (en) 1997-05-27 1998-05-26 Apparatus and method for the reduction of periodic noise in a sigma-delta modulator
ARP980102466A AR012873A1 (es) 1997-05-27 1998-05-27 Un metodo para la reduccion del ruido periodico en un modulador sigma-delta y un aparato para llevar a la practica dicho metodo.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9701986A SE509408C2 (sv) 1997-05-27 1997-05-27 Anordning och förfarande för reducering av periodiskt brus i en sigma-delta modulator

Publications (3)

Publication Number Publication Date
SE9701986D0 true SE9701986D0 (sv) 1997-05-27
SE9701986L SE9701986L (sv) 1998-11-28
SE509408C2 SE509408C2 (sv) 1999-01-25

Family

ID=20407109

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9701986A SE509408C2 (sv) 1997-05-27 1997-05-27 Anordning och förfarande för reducering av periodiskt brus i en sigma-delta modulator

Country Status (12)

Country Link
US (1) US6175321B1 (sv)
EP (1) EP1080534B1 (sv)
JP (1) JP4027434B2 (sv)
KR (1) KR20010013111A (sv)
CN (1) CN1260913A (sv)
AR (1) AR012873A1 (sv)
AU (1) AU751275B2 (sv)
BR (1) BR9809163A (sv)
CO (1) CO4790202A1 (sv)
EE (1) EE03500B1 (sv)
SE (1) SE509408C2 (sv)
WO (1) WO1998054840A2 (sv)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1619601A (en) 1999-11-19 2001-05-30 New Focus, Inc. Method and apparatus for an electro optic converter
US6456223B1 (en) * 1999-12-28 2002-09-24 Texas Instruments Incorporated Pipelined analog to digital converter using digital mismatch noise cancellation
US6897772B1 (en) * 2000-11-14 2005-05-24 Honeywell International, Inc. Multi-function control system
JP4649777B2 (ja) * 2001-02-09 2011-03-16 ソニー株式会社 デルタシグマ変調装置及び方法、並びにデジタル信号処理装置及び方法
US6823033B2 (en) 2002-03-12 2004-11-23 Qualcomm Inc. ΣΔdelta modulator controlled phase locked loop with a noise shaped dither
TWI235000B (en) * 2002-09-24 2005-06-21 Mstar Semiconductor Inc Apparatus and method for masking interference noise contained in signal source
US20040141559A1 (en) * 2002-10-24 2004-07-22 Tewfik Ahmed H. Generating UWB-OFDM signal using sigma-delta modulator
TWI279988B (en) * 2002-12-24 2007-04-21 Fujitsu Ltd Spread spectrum clock generation circuit, jitter generation circuit and semiconductor device
US7561635B2 (en) * 2003-08-05 2009-07-14 Stmicroelectronics Nv Variable coder apparatus for resonant power conversion and method
KR101156877B1 (ko) 2004-07-01 2012-06-20 텔레폰악티에볼라겟엘엠에릭슨(펍) 시그마-델타 변조기를 포함하는 장치 및 시그마-델타변조기에서 양자화된 신호를 발생시키는 방법
DE602004005437T2 (de) * 2004-07-01 2007-07-19 Ericsson Technology Licensing Ab Vorrichtung mit einem Sigma-Delta-Modulator und Verfahren zur Erzeugung eines quantisierten Signals in einem Sigma-Delta Modulator
US6980145B1 (en) * 2004-07-30 2005-12-27 Broadcom Corporation System and method for noise cancellation in a signal processing circuit
US7362250B2 (en) * 2005-01-31 2008-04-22 Texas Instruments Incorporated Dynamic dither for sigma-delta converters
GB0514677D0 (en) 2005-07-18 2005-08-24 Queen Mary & Westfield College Sigma delta modulators
WO2007038280A1 (en) 2005-09-23 2007-04-05 University Of Rochester Blue-noise-modulated sigma-delta analog-to-digital converter
US7215267B1 (en) * 2005-12-19 2007-05-08 Cirrus Logic, Inc. Analog-to-digital converter with dither control
US7821436B2 (en) * 2006-06-08 2010-10-26 Cosmic Circuits Private Limited System and method for reducing power dissipation in an analog to digital converter
JP2009088924A (ja) 2007-09-28 2009-04-23 Fujitsu Ltd 信号変調方法、信号変調装置、電子装置および信号変調プログラム
JP4856659B2 (ja) * 2008-01-30 2012-01-18 ルネサスエレクトロニクス株式会社 半導体集積回路装置
KR101182407B1 (ko) 2008-12-22 2012-09-13 한국전자통신연구원 펄스 생성기 및 연속시간 시그마-델타 변조기
US8866655B2 (en) * 2012-08-10 2014-10-21 Infineon Technologies Ag Modulator with variable quantizer
EP3694109B1 (en) * 2014-02-25 2023-05-03 ams AG Microphone arrangement
US11121718B1 (en) * 2020-08-12 2021-09-14 Analog Devices International Unlimited Company Multi-stage sigma-delta analog-to-digital converter with dither

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999129A (en) * 1975-04-16 1976-12-21 Rolm Corporation Method and apparatus for error reduction in digital information transmission systems
JPS62140518A (ja) * 1985-12-13 1987-06-24 Advantest Corp Ａｄ変換装置
DE3854414T2 (de) 1987-09-25 1996-04-18 Nec Corp AD-Wandler mit ausgezeichnetem Störabstand für kleine Signale.
JP2647136B2 (ja) * 1988-05-13 1997-08-27 株式会社東芝 アナログ−デジタル変換回路
JP3012887B2 (ja) * 1989-03-13 2000-02-28 日本テキサス・インスツルメンツ株式会社 信号変換装置
US5055843A (en) * 1990-01-31 1991-10-08 Analog Devices, Inc. Sigma delta modulator with distributed prefiltering and feedback
US5144308A (en) 1991-05-21 1992-09-01 At&T Bell Laboratories Idle channel tone and periodic noise suppression for sigma-delta modulators using high-level dither

Also Published As

Publication number Publication date
SE9701986L (sv) 1998-11-28
CN1260913A (zh) 2000-07-19
WO1998054840A2 (en) 1998-12-03
EP1080534A2 (en) 2001-03-07
WO1998054840A3 (en) 1999-03-11
US6175321B1 (en) 2001-01-16
EE03500B1 (et) 2001-08-15
AU751275B2 (en) 2002-08-08
SE509408C2 (sv) 1999-01-25
AR012873A1 (es) 2000-11-22
EE9900536A (et) 2000-06-15
EP1080534B1 (en) 2006-02-22
BR9809163A (pt) 2000-08-01
JP4027434B2 (ja) 2007-12-26
CO4790202A1 (es) 1999-05-31
AU7793898A (en) 1998-12-30
JP2002502565A (ja) 2002-01-22
KR20010013111A (ko) 2001-02-26

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