RO84865B - Modulator delta-sigma - Google Patents

Modulator delta-sigma

Info

Publication number
RO84865B
RO84865B RO109753A RO10975383A RO84865B RO 84865 B RO84865 B RO 84865B RO 109753 A RO109753 A RO 109753A RO 10975383 A RO10975383 A RO 10975383A RO 84865 B RO84865 B RO 84865B
Authority
RO
Romania
Prior art keywords
integrator
sampled
signal
delta
analogue
Prior art date
Application number
RO109753A
Other languages
English (en)
Other versions
RO84865A (ro
Inventor
Shenoi, (Nmi) Kishan
Bhagwati Prasad Agrawal
Original Assignee
International Telephone And Telegraph Corporation
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 International Telephone And Telegraph Corporation filed Critical International Telephone And Telegraph Corporation
Publication of RO84865A publication Critical patent/RO84865A/ro
Publication of RO84865B publication Critical patent/RO84865B/ro

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/06—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation
    • H04B14/062—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using delta modulation or one-bit differential modulation [1DPCM]
    • 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
    • H03M3/464—Details of the digital/analogue conversion in the feedback path
    • 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
    • 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
    • H03M3/436—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the order of the loop filter, e.g. error feedback type
    • H03M3/438—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the order of the loop filter, e.g. error feedback type the modulator having a higher order loop filter in the feedforward path
    • H03M3/454—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the order of the loop filter, e.g. error feedback type the modulator having a higher order loop filter in the feedforward path with distributed feedback, i.e. with feedback paths from the quantiser output to more than one filter stage

Abstract

Inventia se refera la un modulator delta-sigma pentru un debit analog conversiei numerice a unui semnal, ca de exemplu, un semanl pe un canal de convorbiri telefonice. Circuitul încorporeaza un integrator care opereaza cu un filtru terce-jos. Semnalul vocal este esantionat cu frecventa ridicata, comparativ cu componenta de frecventa vocala cea mai înalta din canal. Valorile semnalului instantaneu esantionat sînt integrate, esantionate din nou si iar integrate, pentru a reduce zgomotul de codificare. în final, un circuit identificator de nivel în dublu sens conecteaza iesirea celui de-al doilea integrator la un circuit bistabil de tip D, realizînd iesirea cidificata de un bit. Comanda esantionarii si a integratorului este efectuata prin comutatiea unui ansamblu de decalare a încarcatutii unui condensator comandat sincronizat si reactia inversa este aplicata dupa modificarile programate la comutatia condensatoarelor.
RO109753A 1982-01-20 1983-01-17 Modulator delta-sigma RO84865B (ro)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/340,931 US4439756A (en) 1982-01-20 1982-01-20 Delta-Sigma modulator with switch capacitor implementation

Publications (2)

Publication Number Publication Date
RO84865A RO84865A (ro) 1984-08-17
RO84865B true RO84865B (ro) 1984-09-30

Family

ID=23335536

Family Applications (1)

Application Number Title Priority Date Filing Date
RO109753A RO84865B (ro) 1982-01-20 1983-01-17 Modulator delta-sigma

Country Status (28)

Country Link
US (1) US4439756A (ro)
EP (1) EP0084353B1 (ro)
JP (1) JPS58170115A (ro)
KR (1) KR900008049B1 (ro)
AT (1) ATE37256T1 (ro)
AU (1) AU557736B2 (ro)
BE (1) BE895656A (ro)
BR (1) BR8300195A (ro)
CA (1) CA1191958A (ro)
DE (1) DE3378008D1 (ro)
EG (1) EG15067A (ro)
ES (1) ES519149A0 (ro)
FI (1) FI81223C (ro)
GR (1) GR78435B (ro)
HU (1) HU187522B (ro)
IE (1) IE55546B1 (ro)
IN (1) IN159353B (ro)
IT (1) IT1168702B (ro)
MA (1) MA19684A1 (ro)
MX (1) MX153054A (ro)
NO (1) NO158706C (ro)
NZ (1) NZ202845A (ro)
PH (1) PH19777A (ro)
PT (1) PT76126B (ro)
RO (1) RO84865B (ro)
SU (1) SU1336958A3 (ro)
YU (1) YU291882A (ro)
ZA (1) ZA829475B (ro)

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FR2533382B1 (fr) * 1982-09-21 1988-01-22 Senn Patrice Codeur de type delta-sigma, a double integration et applications de ce codeur a une voie de transmission de type mic et a la mesure de tensions continues
BE899174A (nl) * 1984-03-16 1984-09-17 Bell Telephone Mfg Besturingsketen met terugkoppeling en met geschakelde schakelaars en sigma-delta modulator waarin deze wordt toegepast.
US4704600A (en) * 1985-02-04 1987-11-03 Nippon Telegraph And Telephone Corporation Oversampling converter
US4654815A (en) * 1985-02-07 1987-03-31 Texas Instruments Incorporated Analog signal conditioning and digitizing integrated circuit
US4675863A (en) 1985-03-20 1987-06-23 International Mobile Machines Corp. Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
NL8501896A (nl) * 1985-07-02 1987-02-02 Philips Nv Digitaal-analoog omzetter.
AU588428B2 (en) * 1986-02-27 1989-09-14 Alcatel N.V. Converter circuit
US4825448A (en) * 1986-08-07 1989-04-25 International Mobile Machines Corporation Subscriber unit for wireless digital telephone system
US4746899A (en) * 1986-10-07 1988-05-24 Crystal Semiconductor Corporation Method for reducing effects of electrical noise in an analog-to-digital converter
EP0308982B1 (en) * 1987-09-25 1995-09-06 Nec Corporation Analog-to-digital converter having an excellent signal-to-noise ratio for small signals
US4851841A (en) * 1987-10-02 1989-07-25 Crystal Semiconductor Corporation Gain scaling of oversampled analog-to-digital converters
JPH01204528A (ja) * 1988-02-10 1989-08-17 Fujitsu Ltd Ａ／ｄ変換器
JPH01233921A (ja) * 1988-03-15 1989-09-19 Toshiba Corp △−σ変調器を用いたａ／ｄ変換回路
US4876543A (en) * 1988-05-31 1989-10-24 Motorola, Inc. Multi-rate cascaded noise shaping modulator
EP0381764B1 (en) * 1988-06-09 1996-02-07 Asahi Kasei Microsystems Co., Ltd. Analog operation circuit
US4924226A (en) * 1988-07-29 1990-05-08 Carillon Technology, Inc. Signal error compensation
US4972436A (en) * 1988-10-14 1990-11-20 Hayes Microcomputer Products, Inc. High performance sigma delta based analog modem front end
EP0396786B1 (de) * 1989-05-08 1994-01-26 Siemens Aktiengesellschaft Integrierbarer Sigma-Delta-Modulator in Switched-Capacitor-Technik
NL8901602A (nl) * 1989-06-23 1991-01-16 Bronkhorst High Tech Bv Geintegreerde halfgeleider-schakeling voor thermische metingen.
US5063521A (en) * 1989-11-03 1991-11-05 Motorola, Inc. Neuram: neural network with ram
US5055843A (en) * 1990-01-31 1991-10-08 Analog Devices, Inc. Sigma delta modulator with distributed prefiltering and feedback
US5159341A (en) * 1991-03-12 1992-10-27 Analog Devices, Inc. Two phase sampling for a delta sigma modulator
US5287107A (en) * 1992-06-05 1994-02-15 Hewlett-Packard Company Optical isolation amplifier with sigma-delta modulation
US5719572A (en) * 1994-07-08 1998-02-17 Cirrus Logic, Inc. Digital signal processor with reduced pattern dependent noise
US5801652A (en) * 1994-07-08 1998-09-01 Cirrus Logic, Inc. Pattern dependent noise reduction in a digital processing circuit utilizing image circuitry
KR0155622B1 (ko) * 1995-05-02 1998-12-15 문정환 가변이득단을 내재한 델타시그마 아날로그 디지탈 변환기
US5771281A (en) * 1995-05-02 1998-06-23 Batten, Jr.; George Washington Serial-port powered caller identification computer interface
US5760723A (en) * 1996-06-10 1998-06-02 General Electric Company Delta-sigma analog-to-digital converter including charge coupled devices
US6035005A (en) * 1997-02-10 2000-03-07 Motorola, Inc. Receiver with baseband I and Q demodulator
CA2213156A1 (en) * 1997-08-15 1999-02-15 Philsar Electronics Inc. One bit digital quadrature vector modulator
US6275259B1 (en) * 1998-02-02 2001-08-14 International Business Machines Corporation Digital automatic gain control circuit for image system
US6160505A (en) * 1998-02-24 2000-12-12 At&T Corp Method and apparatus for converting an analog signal to a digital signal
GB2335322B (en) * 1998-03-13 2002-04-24 Ericsson Telefon Ab L M Phase detector
US6087969A (en) * 1998-04-27 2000-07-11 Motorola, Inc. Sigma-delta modulator and method for digitizing a signal
US6816100B1 (en) 1999-03-12 2004-11-09 The Regents Of The University Of California Analog-to-digital converters with common-mode rejection dynamic element matching, including as used in delta-sigma modulators
JP3407871B2 (ja) * 1999-09-17 2003-05-19 日本電気株式会社 アナログデジタル混在δς変調器
CA2292463C (en) 1999-12-17 2005-04-12 Vtech Communications, Ltd. Digitally-implemented demodulator
KR20010096789A (ko) * 2000-04-14 2001-11-08 조양호 효과적인 클럭속도를 이용한 시그마 델타 변조기
ATE344549T1 (de) * 2000-07-07 2006-11-15 Koninkl Philips Electronics Nv Sigma-delta modulator mit einstellbarem rückkopplungsfaktor
US7315200B2 (en) 2004-03-31 2008-01-01 Silicon Labs Cp, Inc. Gain control for delta sigma analog-to-digital converter
US7321325B2 (en) 2005-07-07 2008-01-22 Realtek Semiconductor Corp. Background calibration of continuous-time delta-sigma modulator
US7277032B2 (en) 2005-10-21 2007-10-02 Realtek Semiconductor Corp. Low-pass filter based delta-sigma modulator
US7446687B2 (en) 2006-10-27 2008-11-04 Realtek Semiconductor Corp. Method and apparatus to reduce internal circuit errors in a multi-bit delta-sigma modulator
JP4845038B2 (ja) * 2007-03-01 2011-12-28 敏雄 鈴木 鋼材コイル転倒防止具及び転倒防止方法
US7915838B2 (en) * 2007-06-29 2011-03-29 Cypress Semiconductor Corporation Delta-sigma signal density modulation for optical transducer control
US7646325B2 (en) * 2007-09-27 2010-01-12 Nanoamp Mobile, Inc. Analog to digital converter
US7916054B2 (en) * 2008-11-07 2011-03-29 Baker R Jacob K-delta-1-sigma modulator

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Publication number Priority date Publication date Assignee Title
US4009475A (en) * 1974-12-05 1977-02-22 Hybrid Systems Corporation Delta-sigma converter and decoder
FR2462062A1 (fr) * 1979-07-20 1981-02-06 Petit Jean P Codeur delta sigma a double integration analogique et codeur delta sigma a double integration numerique
JPS5625827A (en) * 1979-08-10 1981-03-12 Nec Corp Coding unit
US4270027A (en) * 1979-11-28 1981-05-26 International Telephone And Telegraph Corporation Telephone subscriber line unit with sigma-delta digital to analog converter
CA1184660A (en) * 1981-06-12 1985-03-26 Robert W. Harris Enhanced delta modulation encoder
FR2533382B1 (fr) * 1982-09-21 1988-01-22 Senn Patrice Codeur de type delta-sigma, a double integration et applications de ce codeur a une voie de transmission de type mic et a la mesure de tensions continues

Also Published As

Publication number Publication date
ES8500680A1 (es) 1984-06-16
AU9154582A (en) 1983-07-28
DE3378008D1 (en) 1988-10-20
GR78435B (ro) 1984-09-27
JPS58170115A (ja) 1983-10-06
EP0084353A2 (en) 1983-07-27
PT76126A (en) 1983-02-01
MX153054A (es) 1986-07-22
BE895656A (fr) 1983-07-20
IT8319189A0 (it) 1983-01-20
EP0084353A3 (en) 1985-08-14
JPS646572B2 (ro) 1989-02-03
IE55546B1 (en) 1990-10-24
FI830182L (fi) 1983-07-21
FI830182A0 (fi) 1983-01-20
AU557736B2 (en) 1987-01-08
ES519149A0 (es) 1984-06-16
NO158706C (no) 1988-10-19
MA19684A1 (fr) 1983-10-01
US4439756A (en) 1984-03-27
NO830149L (no) 1983-07-21
ATE37256T1 (de) 1988-09-15
PH19777A (en) 1986-06-27
EP0084353B1 (en) 1988-09-14
EG15067A (en) 1985-06-30
FI81223B (fi) 1990-05-31
NZ202845A (en) 1985-11-08
ZA829475B (en) 1983-11-30
RO84865A (ro) 1984-08-17
PT76126B (en) 1985-11-13
IN159353B (ro) 1987-05-09
SU1336958A3 (ru) 1987-09-07
FI81223C (fi) 1990-09-10
NO158706B (no) 1988-07-11
KR900008049B1 (ko) 1990-10-31
CA1191958A (en) 1985-08-13
IT8319189A1 (it) 1984-07-20
IT1168702B (it) 1987-05-20
BR8300195A (pt) 1983-10-11
KR840003558A (ko) 1984-09-08
YU291882A (en) 1985-04-30
IE830104L (en) 1983-07-20
HU187522B (en) 1986-01-28

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