GB2233518B - Analogue to digital converters - Google Patents

Analogue to digital converters

Info

Publication number
GB2233518B
GB2233518B GB9012233A GB9012233A GB2233518B GB 2233518 B GB2233518 B GB 2233518B GB 9012233 A GB9012233 A GB 9012233A GB 9012233 A GB9012233 A GB 9012233A GB 2233518 B GB2233518 B GB 2233518B
Authority
GB
United Kingdom
Prior art keywords
analogue
digital converters
delta
sigma
converters
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
GB9012233A
Other versions
GB9012233D0 (en
GB2233518A (en
Inventor
Ian Juso Dedic
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Publication of GB9012233D0 publication Critical patent/GB9012233D0/en
Publication of GB2233518A publication Critical patent/GB2233518A/en
Application granted granted Critical
Publication of GB2233518B publication Critical patent/GB2233518B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/22—Homodyne or synchrodyne circuits
    • H03D1/2245—Homodyne or synchrodyne circuits using two quadrature channels
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
    • 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
    • H03M3/402—Arrangements specific to bandpass modulators
    • H03M3/404—Arrangements specific to bandpass modulators characterised by the type of bandpass filters used
    • H03M3/406—Arrangements specific to bandpass modulators characterised by the type of bandpass filters used by the use of a pair of integrators forming a closed loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0001—Circuit elements of demodulators
    • H03D2200/0025—Gain control circuits
    • H03D2200/0027—Gain control circuits including arrangements for assuring the same gain in two paths
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/005—Analog to digital conversion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/006—Signal sampling
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/006—Demodulation of angle-, frequency- or phase- modulated oscillations by sampling the oscillations and further processing the samples, e.g. by computing techniques
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
    • 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
    • H03M3/456—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 first order loop filter in the feedforward path

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Theoretical Computer Science (AREA)

Abstract

Oversampled delta-sigma converters are used to provide high resolution and large dynamic range in zero-IF analogue to digital converters, and narrow-band filters within the delta-sigma loops are used to force quantisation noise away from frequencies of interest. <IMAGE>
GB9012233A 1989-06-02 1990-06-01 Analogue to digital converters Expired - Fee Related GB2233518B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8912780A GB8912780D0 (en) 1989-06-02 1989-06-02 Analogue to digital converters

Publications (3)

Publication Number Publication Date
GB9012233D0 GB9012233D0 (en) 1990-07-18
GB2233518A GB2233518A (en) 1991-01-09
GB2233518B true GB2233518B (en) 1993-09-29

Family

ID=10657816

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8912780A Pending GB8912780D0 (en) 1989-06-02 1989-06-02 Analogue to digital converters
GB9012233A Expired - Fee Related GB2233518B (en) 1989-06-02 1990-06-01 Analogue to digital converters

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB8912780A Pending GB8912780D0 (en) 1989-06-02 1989-06-02 Analogue to digital converters

Country Status (1)

Country Link
GB (2) GB8912780D0 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4104882A1 (en) * 1991-02-18 1992-08-20 Blaupunkt Werke Gmbh CAR RADIO WITH A CIRCUIT FOR THE ANALOG / DIGITAL CONVERSION OF AN INTERMEDIATE FREQUENCY SIGNAL
FI107855B (en) * 1993-09-10 2001-10-15 Nokia Mobile Phones Ltd Demodulation of mf signal with sigma-delta converter
DE4342145A1 (en) * 1993-12-10 1995-06-14 Blaupunkt Werke Gmbh Circuit arrangement for analog / digital conversion of frequency-modulated intermediate frequency signals
KR100379048B1 (en) * 1995-04-03 2003-06-11 코닌클리케 필립스 일렉트로닉스 엔.브이. Quadrature Signal Conversion Device
NO303660B1 (en) 1996-11-07 1998-08-10 Nera Asa Method and system of quadrature modulation and digital-to-analog conversion
GB2330709B (en) 1997-10-24 2001-07-04 Sony Uk Ltd Signal processors
US7024221B2 (en) 2001-01-12 2006-04-04 Silicon Laboratories Inc. Notch filter for DC offset reduction in radio-frequency apparatus and associated methods
US6804497B2 (en) 2001-01-12 2004-10-12 Silicon Laboratories, Inc. Partitioned radio-frequency apparatus and associated methods
US6970717B2 (en) * 2001-01-12 2005-11-29 Silicon Laboratories Inc. Digital architecture for radio-frequency apparatus and associated methods
AU773665B2 (en) * 1999-11-02 2004-06-03 Commonwealth Of Australia, The Enhanced direct digitising array arrangement
AUPQ381499A0 (en) 1999-11-02 1999-11-25 Commonwealth Of Australia, The Enhanced direct digitising array arrangement
US7177610B2 (en) 2001-01-12 2007-02-13 Silicon Laboratories Inc. Calibrated low-noise current and voltage references and associated methods
US7138858B2 (en) 2001-01-12 2006-11-21 Silicon Laboratories, Inc. Apparatus and methods for output buffer circuitry with constant output power in radio-frequency circuitry
US7158574B2 (en) 2001-01-12 2007-01-02 Silicon Laboratories Inc. Digital interface in radio-frequency apparatus and associated methods
US7035611B2 (en) 2001-01-12 2006-04-25 Silicon Laboratories Inc. Apparatus and method for front-end circuitry in radio-frequency apparatus
US7031683B2 (en) 2001-01-12 2006-04-18 Silicon Laboratories Inc. Apparatus and methods for calibrating signal-processing circuitry
KR101031735B1 (en) 2002-03-15 2011-04-29 실리콘 래버래토리즈 인코포레이티드 Radio-frequency apparatus and associated methods
EP1365515B1 (en) * 2002-05-22 2006-10-18 Freescale Semiconductor, Inc. Analog-to-digital converter arrangement and method
GB0303028D0 (en) * 2003-02-11 2003-03-12 Rodborough Radio Technology High frequency bandpass analogue to digital converters

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989007368A1 (en) * 1988-01-28 1989-08-10 Motorola, Inc. Method and arrangement for a sigma delta converter for bandpass signals

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989007368A1 (en) * 1988-01-28 1989-08-10 Motorola, Inc. Method and arrangement for a sigma delta converter for bandpass signals

Also Published As

Publication number Publication date
GB9012233D0 (en) 1990-07-18
GB2233518A (en) 1991-01-09
GB8912780D0 (en) 1989-07-19

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940601