WO2008045713A3 - Methods and systems for implementing a digital-to-analog converter - Google Patents

Methods and systems for implementing a digital-to-analog converter Download PDF

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Publication number
WO2008045713A3
WO2008045713A3 PCT/US2007/080121 US2007080121W WO2008045713A3 WO 2008045713 A3 WO2008045713 A3 WO 2008045713A3 US 2007080121 W US2007080121 W US 2007080121W WO 2008045713 A3 WO2008045713 A3 WO 2008045713A3
Authority
WO
WIPO (PCT)
Prior art keywords
implementing
digital
systems
methods
analog converter
Prior art date
Application number
PCT/US2007/080121
Other languages
French (fr)
Other versions
WO2008045713A2 (en
Inventor
Lawrence Frederick Heyl
David Tupman
Brian A Childers
Original Assignee
Apple Inc
Lawrence Frederick Heyl
David Tupman
Brian A Childers
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 Apple Inc, Lawrence Frederick Heyl, David Tupman, Brian A Childers filed Critical Apple Inc
Publication of WO2008045713A2 publication Critical patent/WO2008045713A2/en
Publication of WO2008045713A3 publication Critical patent/WO2008045713A3/en

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
    • H03M3/30—Delta-sigma modulation
    • H03M3/322—Continuously compensating for, or preventing, undesired influence of physical parameters
    • H03M3/368—Continuously compensating for, or preventing, undesired influence of physical parameters of noise other than the quantisation noise already being shaped inherently by delta-sigma modulators
    • H03M3/376—Prevention or reduction of switching transients, e.g. glitches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0283—Filters characterised by the filter structure
    • H03H17/0292—Time multiplexed filters; Time sharing filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/04—Recursive filters
    • H03H17/0416—Recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/06—Non-recursive filters
    • H03H17/0607—Non-recursive filters comprising a ROM addressed by the input data signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/06—Non-recursive filters
    • H03H17/0621—Non-recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2218/00—Indexing scheme relating to details of digital filters
    • H03H2218/08—Resource sharing
    • H03H2218/085—Multipliers
    • 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
    • H03M3/32—Delta-sigma modulation with special provisions or arrangements for power saving, e.g. by allowing a sleep mode, using lower supply voltage for downstream stages, using multiple clock domains, by selectively turning on stages when needed
    • 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
    • H03M3/424—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 multiple 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
    • 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
    • H03M3/50—Digital/analogue converters using delta-sigma modulation as an intermediate step
    • H03M3/502—Details of the final digital/analogue conversion following the digital delta-sigma modulation
    • H03M3/506—Details of the final digital/analogue conversion following the digital delta-sigma modulation the final digital/analogue converter being constituted by a pulse width modulator
    • 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
    • H03M3/50—Digital/analogue converters using delta-sigma modulation as an intermediate step
    • H03M3/508—Details relating to the interpolation process
    • 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
    • H03M3/50—Digital/analogue converters using delta-sigma modulation as an intermediate step
    • H03M3/51—Automatic control for modifying converter range
    • 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
    • H03M7/3026—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 multiple 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
    • H03M7/3042—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 being of the error feedback type, i.e. having loop filter stages in the feedback path only

Abstract

A self-contained DAC that is especially suitable for use as an IP core, particularly for SOC (System on Chip) implementation. Techniques are applied to employ certain circuits (such as arithmetic element 302) to perform multiple functions in the DAC, thereby resulting in space saving. Techniques are also applied to employ fewer circuits per functional block to achieve further space saving. By employing multiple clock domains and turning on selective circuits on an as-needed basis, power saving is also realized.
PCT/US2007/080121 2006-10-05 2007-10-01 Methods and systems for implementing a digital-to-analog converter WO2008045713A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/544,489 US7358884B1 (en) 2006-10-05 2006-10-05 Methods and systems for implementing a Digital-to-Analog Converter
US11/544,489 2006-10-05

Publications (2)

Publication Number Publication Date
WO2008045713A2 WO2008045713A2 (en) 2008-04-17
WO2008045713A3 true WO2008045713A3 (en) 2008-05-29

Family

ID=39243752

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/080121 WO2008045713A2 (en) 2006-10-05 2007-10-01 Methods and systems for implementing a digital-to-analog converter

Country Status (3)

Country Link
US (1) US7358884B1 (en)
TW (1) TWI404342B (en)
WO (1) WO2008045713A2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8299946B2 (en) * 2010-02-03 2012-10-30 Taiwan Semiconductor Manufacturing Company, Ltd. Noise shaping for digital pulse-width modulators
WO2013088173A1 (en) 2011-12-14 2013-06-20 Wolfson Microelectronics Plc Data transfer
GB2497566A (en) * 2011-12-14 2013-06-19 Wolfson Microelectronics Plc Simultaneous transmission of a plurality of audio data streams via a single communication link
GB2503472A (en) * 2012-06-27 2014-01-01 Nordic Semiconductor Asa Data transfer between clock domains following clock transition in destination domain
US11551076B2 (en) * 2014-09-05 2023-01-10 Qualcomm Incorporated Event-driven temporal convolution for asynchronous pulse-modulated sampled signals
US9806610B2 (en) * 2015-09-30 2017-10-31 Texas Instruments Incorporated Noise-shaped power converters
TWI603589B (en) * 2016-11-17 2017-10-21 碩呈科技股份有限公司 Apparatus for differential amplitude pulse width modulation digital-to-analog conversion and method for encoding output signal thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5642382A (en) * 1995-03-01 1997-06-24 Hitachi America, Ltd. Fir filters with multiplexed inputs suitable for use in reconfigurable adaptive equalizers
US20030179116A1 (en) * 2002-03-25 2003-09-25 Mitsubishi Denki Kabushiki Kaisha Digital to analog converter
US20040130472A1 (en) * 2002-12-27 2004-07-08 Renesas Technology Corp. Pulse width modulation digital amplifier
US20050110667A1 (en) * 2003-09-25 2005-05-26 International Rectifier Corporation Method and apparatus for converting PCM to PWM
US20070046503A1 (en) * 2005-08-24 2007-03-01 Van Baarsen John P Circuitry and method for sampling audio data

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5657423A (en) * 1993-02-22 1997-08-12 Texas Instruments Incorporated Hardware filter circuit and address circuitry for MPEG encoded data
US6011501A (en) * 1998-12-31 2000-01-04 Cirrus Logic, Inc. Circuits, systems and methods for processing data in a one-bit format
US6340940B1 (en) * 2000-07-18 2002-01-22 Cirrus Logic, Inc. Digital to analog conversion circuits and methods utilizing single-bit delta-SIGMA modulators and multiple-bit digital to analog converters
US20040189502A1 (en) * 2003-03-04 2004-09-30 Lee Ying Lau Multi-level pulse width modulation in digital system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5642382A (en) * 1995-03-01 1997-06-24 Hitachi America, Ltd. Fir filters with multiplexed inputs suitable for use in reconfigurable adaptive equalizers
US20030179116A1 (en) * 2002-03-25 2003-09-25 Mitsubishi Denki Kabushiki Kaisha Digital to analog converter
US20040130472A1 (en) * 2002-12-27 2004-07-08 Renesas Technology Corp. Pulse width modulation digital amplifier
US20050110667A1 (en) * 2003-09-25 2005-05-26 International Rectifier Corporation Method and apparatus for converting PCM to PWM
US20070046503A1 (en) * 2005-08-24 2007-03-01 Van Baarsen John P Circuitry and method for sampling audio data

Also Published As

Publication number Publication date
US20080084343A1 (en) 2008-04-10
TWI404342B (en) 2013-08-01
US7358884B1 (en) 2008-04-15
WO2008045713A2 (en) 2008-04-17
TW200835164A (en) 2008-08-16

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