SE509408C2 - Anordning och förfarande för reducering av periodiskt brus i en sigma-delta modulator - Google Patents
Anordning och förfarande för reducering av periodiskt brus i en sigma-delta modulatorInfo
- Publication number
- SE509408C2 SE509408C2 SE9701986A SE9701986A SE509408C2 SE 509408 C2 SE509408 C2 SE 509408C2 SE 9701986 A SE9701986 A SE 9701986A SE 9701986 A SE9701986 A SE 9701986A SE 509408 C2 SE509408 C2 SE 509408C2
- Authority
- SE
- Sweden
- Prior art keywords
- signal
- sigma
- discrete
- integrated
- period length
- Prior art date
Links
Classifications
-
- 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
- H03M7/3006—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
- 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)
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 |
KR19997011091A KR20010013111A (ko) | 1997-05-27 | 1998-05-26 | 시그마-델타 변조기에서 주기적 잡음을 감소하는 장치 및방법 |
EEP199900536A EE03500B1 (et) | 1997-05-27 | 1998-05-26 | Seade ja meetod perioodilise müra vähendamiseks sigma-delta modulaatoris |
CO98029413A CO4790202A1 (es) | 1997-05-27 | 1998-05-26 | Aparato y metodo para la reduccion de ruido periodico en un modulador sigma-delta |
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 |
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 |
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 |
EP98926008A EP1080534B1 (en) | 1997-05-27 | 1998-05-26 | Apparatus and method for the reduction of periodic noise in a sigma-delta modulator |
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 |
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 SE9701986D0 (sv) | 1997-05-27 |
SE9701986L SE9701986L (sv) | 1998-11-28 |
SE509408C2 true 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 (zh) |
EP (1) | EP1080534B1 (zh) |
JP (1) | JP4027434B2 (zh) |
KR (1) | KR20010013111A (zh) |
CN (1) | CN1260913A (zh) |
AR (1) | AR012873A1 (zh) |
AU (1) | AU751275B2 (zh) |
BR (1) | BR9809163A (zh) |
CO (1) | CO4790202A1 (zh) |
EE (1) | EE03500B1 (zh) |
SE (1) | SE509408C2 (zh) |
WO (1) | WO1998054840A2 (zh) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001037016A1 (en) | 1999-11-19 | 2001-05-25 | 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 |
EP1672800B1 (en) * | 2002-12-24 | 2009-08-19 | Fujitsu Microelectronics Limited | Jitter generation circuit |
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 |
ATE357774T1 (de) * | 2004-07-01 | 2007-04-15 | Ericsson Technology Licensing | 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 |
EP2911303B1 (en) * | 2014-02-25 | 2020-07-22 | ams AG | Delta-sigma modulator and method for signal conversion |
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)
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 |
-
1997
- 1997-05-27 SE SE9701986A patent/SE509408C2/sv not_active IP Right Cessation
-
1998
- 1998-05-26 WO PCT/SE1998/000990 patent/WO1998054840A2/en active IP Right Grant
- 1998-05-26 KR KR19997011091A patent/KR20010013111A/ko not_active Application Discontinuation
- 1998-05-26 BR BR9809163-8A patent/BR9809163A/pt not_active IP Right Cessation
- 1998-05-26 JP JP50058799A patent/JP4027434B2/ja not_active Expired - Lifetime
- 1998-05-26 EP EP98926008A patent/EP1080534B1/en not_active Expired - Lifetime
- 1998-05-26 CN CN98805577A patent/CN1260913A/zh active Pending
- 1998-05-26 CO CO98029413A patent/CO4790202A1/es unknown
- 1998-05-26 EE EEP199900536A patent/EE03500B1/xx not_active IP Right Cessation
- 1998-05-26 AU AU77938/98A patent/AU751275B2/en not_active Ceased
- 1998-05-26 US US09/084,650 patent/US6175321B1/en not_active Expired - Lifetime
- 1998-05-27 AR ARP980102466A patent/AR012873A1/es unknown
Also Published As
Publication number | Publication date |
---|---|
BR9809163A (pt) | 2000-08-01 |
EE03500B1 (et) | 2001-08-15 |
CO4790202A1 (es) | 1999-05-31 |
EP1080534A2 (en) | 2001-03-07 |
US6175321B1 (en) | 2001-01-16 |
AR012873A1 (es) | 2000-11-22 |
JP2002502565A (ja) | 2002-01-22 |
CN1260913A (zh) | 2000-07-19 |
SE9701986D0 (sv) | 1997-05-27 |
WO1998054840A3 (en) | 1999-03-11 |
JP4027434B2 (ja) | 2007-12-26 |
EP1080534B1 (en) | 2006-02-22 |
SE9701986L (sv) | 1998-11-28 |
AU751275B2 (en) | 2002-08-08 |
EE9900536A (et) | 2000-06-15 |
AU7793898A (en) | 1998-12-30 |
WO1998054840A2 (en) | 1998-12-03 |
KR20010013111A (ko) | 2001-02-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |