WO2005082236A3 - Multi-bit adc with sigma-delta modulation - Google Patents

Multi-bit adc with sigma-delta modulation Download PDF

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Publication number
WO2005082236A3
WO2005082236A3 PCT/US2005/005913 US2005005913W WO2005082236A3 WO 2005082236 A3 WO2005082236 A3 WO 2005082236A3 US 2005005913 W US2005005913 W US 2005005913W WO 2005082236 A3 WO2005082236 A3 WO 2005082236A3
Authority
WO
WIPO (PCT)
Prior art keywords
sigma
delta modulator
bit adc
delta modulation
red
Prior art date
Application number
PCT/US2005/005913
Other languages
French (fr)
Other versions
WO2005082236A2 (en
Inventor
Ethan Petersen
William Shea
Bradford B Chew
Original Assignee
Nellcor Puritan Bennett Inc
Ethan Petersen
William Shea
Bradford B Chew
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 Nellcor Puritan Bennett Inc, Ethan Petersen, William Shea, Bradford B Chew filed Critical Nellcor Puritan Bennett Inc
Priority to MXPA06009748A priority Critical patent/MXPA06009748A/en
Priority to DE602005014618T priority patent/DE602005014618D1/en
Priority to AT05723680T priority patent/ATE432039T1/en
Priority to EP05723680A priority patent/EP1722671B1/en
Priority to CA2556754A priority patent/CA2556754C/en
Priority to JP2007500973A priority patent/JP4717059B2/en
Priority to AU2005216956A priority patent/AU2005216956A1/en
Publication of WO2005082236A2 publication Critical patent/WO2005082236A2/en
Publication of WO2005082236A3 publication Critical patent/WO2005082236A3/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7228—Signal modulation applied to the input signal sent to patient or subject; demodulation to recover the physiological signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • 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
    • H03M3/424—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
    • 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

Abstract

An oximeter uses a sigma-delta modulator and a multi-bit ADC (54) with PWM feedback (56) enabling high precision multi-bit conversion. Demodulation is done in software, thus requiring only a single hardware path for both red and IR. Multiple capacitors are switched into the integrator (44) in the sigma-delta modulator, with different capacitors for red, IR and dark signals, thus enabling the use of the single hardware path. A switching circuit (76) at the input of the sigma-delta modulator acts as a sample and hold, controlled by the PWM feedback (56).
PCT/US2005/005913 2004-02-25 2005-02-24 Multi-bit adc with sigma-delta modulation WO2005082236A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
MXPA06009748A MXPA06009748A (en) 2004-02-25 2005-02-24 Multi-bit adc with sigma-delta modulation.
DE602005014618T DE602005014618D1 (en) 2004-02-25 2005-02-24 MULTI-BIT ADC WITH SIGMA DELTA MODULATION
AT05723680T ATE432039T1 (en) 2004-02-25 2005-02-24 MULTI-BIT ADC WITH SIGMA DELTA MODULATION
EP05723680A EP1722671B1 (en) 2004-02-25 2005-02-24 Multi-bit adc with sigma-delta modulation
CA2556754A CA2556754C (en) 2004-02-25 2005-02-24 Multi-bit adc with sigma-delta modulation
JP2007500973A JP4717059B2 (en) 2004-02-25 2005-02-24 Multi-bit ADC using sigma-delta modulation
AU2005216956A AU2005216956A1 (en) 2004-02-25 2005-02-24 Multi-bit ADC with sigma-delta modulation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/787,542 2004-02-25
US10/787,542 US7142142B2 (en) 2004-02-25 2004-02-25 Multi-bit ADC with sigma-delta modulation

Publications (2)

Publication Number Publication Date
WO2005082236A2 WO2005082236A2 (en) 2005-09-09
WO2005082236A3 true WO2005082236A3 (en) 2005-12-01

Family

ID=34861916

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/005913 WO2005082236A2 (en) 2004-02-25 2005-02-24 Multi-bit adc with sigma-delta modulation

Country Status (12)

Country Link
US (2) US7142142B2 (en)
EP (1) EP1722671B1 (en)
JP (1) JP4717059B2 (en)
KR (1) KR20070024491A (en)
CN (1) CN1929778A (en)
AT (1) ATE432039T1 (en)
AU (1) AU2005216956A1 (en)
CA (1) CA2556754C (en)
DE (1) DE602005014618D1 (en)
ES (1) ES2327759T3 (en)
MX (1) MXPA06009748A (en)
WO (1) WO2005082236A2 (en)

Families Citing this family (83)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7379001B2 (en) * 2003-09-22 2008-05-27 Tc Electric A/S Self-oscillating A/D-converter
JP2008531225A (en) 2005-03-01 2008-08-14 マシモ・ラボラトリーズ・インコーポレーテッド Multi-wavelength sensor interconnection
EP1869771B1 (en) * 2005-04-15 2009-11-18 Semtech International AG Electronic circuit for the analog-to-digital conversion of an analog input signal
EP1801977B1 (en) * 2005-12-22 2009-07-15 Telefonaktiebolaget L M Ericsson AB (Publ) Adjusting an input signal level of a sigma-delta converter
US9300261B2 (en) * 2006-03-10 2016-03-29 Nvidia Corporation Method and apparatus for efficient load biasing
US7548178B2 (en) * 2006-03-10 2009-06-16 Nvidia Corporation Method and apparatus for ADC size and performance optimization
US7221303B1 (en) * 2006-03-24 2007-05-22 Cirrus Logic, Inc. Delta sigma modulator analog-to-digital converters with multiple threshold comparisons during a delta sigma modulator output cycle
TWI318508B (en) * 2006-04-19 2009-12-11 Realtek Semiconductor Corp Sigma-delta modulator
JP2008041884A (en) * 2006-08-04 2008-02-21 Rohm Co Ltd Semiconductor integrated circuit, and electronic equipment equipped with it
US7423567B2 (en) * 2006-09-12 2008-09-09 Cirrus Logic, Inc. Analog-to-digital converter (ADC) having a reduced number of quantizer output levels
US7375666B2 (en) * 2006-09-12 2008-05-20 Cirrus Logic, Inc. Feedback topology delta-sigma modulator having an AC-coupled feedback path
US8600467B2 (en) 2006-11-29 2013-12-03 Cercacor Laboratories, Inc. Optical sensor including disposable and reusable elements
US8362838B2 (en) * 2007-01-19 2013-01-29 Cirrus Logic, Inc. Multi-stage amplifier with multiple sets of fixed and variable voltage rails
TWI400891B (en) * 2007-02-15 2013-07-01 Realtek Semiconductor Corp Loop filter circuit in sigma-delta modulator and filtering method thereof
JP4816508B2 (en) * 2007-03-02 2011-11-16 ヤマハ株式会社 ΔΣ AD converter, class D amplifier, and DC-DC converter
US20080221418A1 (en) * 2007-03-09 2008-09-11 Masimo Corporation Noninvasive multi-parameter patient monitor
US7667408B2 (en) * 2007-03-12 2010-02-23 Cirrus Logic, Inc. Lighting system with lighting dimmer output mapping
US8076920B1 (en) 2007-03-12 2011-12-13 Cirrus Logic, Inc. Switching power converter and control system
US8018171B1 (en) 2007-03-12 2011-09-13 Cirrus Logic, Inc. Multi-function duty cycle modifier
US7804256B2 (en) 2007-03-12 2010-09-28 Cirrus Logic, Inc. Power control system for current regulated light sources
EP2139383B1 (en) 2007-03-27 2013-02-13 Masimo Laboratories, Inc. Multiple wavelength optical sensor
US8374665B2 (en) 2007-04-21 2013-02-12 Cercacor Laboratories, Inc. Tissue profile wellness monitor
US7554473B2 (en) * 2007-05-02 2009-06-30 Cirrus Logic, Inc. Control system using a nonlinear delta-sigma modulator with nonlinear process modeling
US7696913B2 (en) * 2007-05-02 2010-04-13 Cirrus Logic, Inc. Signal processing system using delta-sigma modulation having an internal stabilizer path with direct output-to-integrator connection
US8102127B2 (en) 2007-06-24 2012-01-24 Cirrus Logic, Inc. Hybrid gas discharge lamp-LED lighting system
US7623053B2 (en) * 2007-09-26 2009-11-24 Medtronic, Inc. Implantable medical device with low power delta-sigma analog-to-digital converter
US7479910B1 (en) * 2007-09-26 2009-01-20 Medtronic, Inc. Capacitive digital-to-analog converter reset in an implantable medical device analog-to-digital converter
US7714757B2 (en) * 2007-09-26 2010-05-11 Medtronic, Inc. Chopper-stabilized analog-to-digital converter
KR100949880B1 (en) * 2007-10-31 2010-03-26 주식회사 하이닉스반도체 Semicoductor device and Method of fabricating the same
US7804697B2 (en) * 2007-12-11 2010-09-28 Cirrus Logic, Inc. History-independent noise-immune modulated transformer-coupled gate control signaling method and apparatus
US8576589B2 (en) * 2008-01-30 2013-11-05 Cirrus Logic, Inc. Switch state controller with a sense current generated operating voltage
US8008898B2 (en) 2008-01-30 2011-08-30 Cirrus Logic, Inc. Switching regulator with boosted auxiliary winding supply
US7755525B2 (en) * 2008-01-30 2010-07-13 Cirrus Logic, Inc. Delta sigma modulator with unavailable output values
US8022683B2 (en) * 2008-01-30 2011-09-20 Cirrus Logic, Inc. Powering a power supply integrated circuit with sense current
US9560994B2 (en) * 2008-03-26 2017-02-07 Covidien Lp Pulse oximeter with adaptive power conservation
US7759881B1 (en) 2008-03-31 2010-07-20 Cirrus Logic, Inc. LED lighting system with a multiple mode current control dimming strategy
US8008902B2 (en) 2008-06-25 2011-08-30 Cirrus Logic, Inc. Hysteretic buck converter having dynamic thresholds
US20090326347A1 (en) * 2008-06-30 2009-12-31 Bennett Scharf Synchronous Light Detection Utilizing CMOS/CCD Sensors For Oximetry Sensing
JP5756752B2 (en) 2008-07-03 2015-07-29 セルカコール・ラボラトリーズ・インコーポレイテッドＣｅｒｃａｃｏｒ Ｌａｂｏｒａｔｏｒｉｅｓ， Ｉｎｃ． Sensor
US8212491B2 (en) * 2008-07-25 2012-07-03 Cirrus Logic, Inc. Switching power converter control with triac-based leading edge dimmer compatibility
US8344707B2 (en) * 2008-07-25 2013-01-01 Cirrus Logic, Inc. Current sensing in a switching power converter
US8279628B2 (en) 2008-07-25 2012-10-02 Cirrus Logic, Inc. Audible noise suppression in a resonant switching power converter
US8515509B2 (en) 2008-08-04 2013-08-20 Cercacor Laboratories, Inc. Multi-stream emitter for noninvasive measurement of blood constituents
JP5177094B2 (en) * 2008-08-29 2013-04-03 ブラザー工業株式会社 High-voltage power supply device using pulse width modulation method and digital-analog converter, its control device, and its manufacturing method
US8487546B2 (en) * 2008-08-29 2013-07-16 Cirrus Logic, Inc. LED lighting system with accurate current control
US8179110B2 (en) * 2008-09-30 2012-05-15 Cirrus Logic Inc. Adjustable constant current source with continuous conduction mode (“CCM”) and discontinuous conduction mode (“DCM”) operation
US8222872B1 (en) 2008-09-30 2012-07-17 Cirrus Logic, Inc. Switching power converter with selectable mode auxiliary power supply
US8288954B2 (en) 2008-12-07 2012-10-16 Cirrus Logic, Inc. Primary-side based control of secondary-side current for a transformer
US8299722B2 (en) 2008-12-12 2012-10-30 Cirrus Logic, Inc. Time division light output sensing and brightness adjustment for different spectra of light emitting diodes
US8362707B2 (en) 2008-12-12 2013-01-29 Cirrus Logic, Inc. Light emitting diode based lighting system with time division ambient light feedback response
US7994863B2 (en) * 2008-12-31 2011-08-09 Cirrus Logic, Inc. Electronic system having common mode voltage range enhancement
KR101543674B1 (en) * 2009-01-13 2015-08-11 삼성전자주식회사 - - Image sensor for reducing kick-back noise and image pick-up device having the same
US8482223B2 (en) 2009-04-30 2013-07-09 Cirrus Logic, Inc. Calibration of lamps
US8509869B2 (en) 2009-05-15 2013-08-13 Covidien Lp Method and apparatus for detecting and analyzing variations in a physiologic parameter
US8198874B2 (en) * 2009-06-30 2012-06-12 Cirrus Logic, Inc. Switching power converter with current sensing transformer auxiliary power supply
US8212493B2 (en) 2009-06-30 2012-07-03 Cirrus Logic, Inc. Low energy transfer mode for auxiliary power supply operation in a cascaded switching power converter
US8248145B2 (en) * 2009-06-30 2012-08-21 Cirrus Logic, Inc. Cascode configured switching using at least one low breakdown voltage internal, integrated circuit switch to control at least one high breakdown voltage external switch
US8963535B1 (en) 2009-06-30 2015-02-24 Cirrus Logic, Inc. Switch controlled current sensing using a hall effect sensor
US8494786B2 (en) 2009-07-30 2013-07-23 Covidien Lp Exponential sampling of red and infrared signals
US7903010B1 (en) 2009-08-31 2011-03-08 Cirrus Logic, Inc. Delta-sigma analog-to-digital converter (ADC) having a serialized quantizer output
US9155174B2 (en) 2009-09-30 2015-10-06 Cirrus Logic, Inc. Phase control dimming compatible lighting systems
US8861669B2 (en) * 2009-09-30 2014-10-14 Synaptics Incorporated Stream clock recovery in high definition multimedia digital system
US8654483B2 (en) * 2009-11-09 2014-02-18 Cirrus Logic, Inc. Power system having voltage-based monitoring for over current protection
US9839381B1 (en) 2009-11-24 2017-12-12 Cercacor Laboratories, Inc. Physiological measurement system with automatic wavelength adjustment
GB2487882B (en) 2009-12-04 2017-03-29 Masimo Corp Calibration for multi-stage physiological monitors
US20110141016A1 (en) * 2009-12-15 2011-06-16 Lu Chun Hao Mouse for measuring consistency of blood oxygen
US8466821B2 (en) * 2010-01-20 2013-06-18 Panasonic Corporation Delta sigma ADC
CN102959371B (en) * 2010-07-01 2015-01-21 松下电器产业株式会社 Target object detection device
EP2448123B1 (en) * 2010-10-29 2013-06-19 ST-Ericsson SA Analog to digital conversion
KR20130015162A (en) * 2011-08-02 2013-02-13 에스케이하이닉스 주식회사 Ananlog digital converter, image sensor comprising this, and apparatus comprising the image sensor
CN102684701B (en) 2012-04-27 2014-07-09 苏州上声电子有限公司 Method and device for driving digital speaker based on code conversion
US8643524B1 (en) 2012-09-27 2014-02-04 Cirrus Logic, Inc. Feed-forward analog-to-digital converter (ADC) with a reduced number of amplifiers and feed-forward signal paths
DE102012113008A1 (en) * 2012-12-21 2014-06-26 Hamilton Bonaduz Ag Apparatus and method for measuring a periodic signal
US20150256151A1 (en) 2014-03-06 2015-09-10 Texas Instruments Incorporated Method and apparatus to reduce noise in ct data acquisition systems
KR101932545B1 (en) * 2014-04-29 2019-03-15 한화테크윈 주식회사 Imaging Device including Image Signal Processing
CN106535754B (en) 2014-07-28 2019-10-29 夏普株式会社 Sensor, sensor device and electronic equipment
WO2016051741A1 (en) * 2014-09-30 2016-04-07 パナソニックＩｐマネジメント株式会社 Motor control device and motor control method
GB2532015B (en) * 2014-11-04 2018-12-26 Cirrus Logic Int Semiconductor Ltd Improved analogue-to-digital convertor
TWI812673B (en) 2018-02-12 2023-08-21 美商富曼西公司 Naphthalene isoxazoline compounds for controlling invertebrate pests
US11448564B2 (en) 2018-05-28 2022-09-20 Sciosense B.V. Sensor arrangement and method of operating a sensor arrangement
CN109171764A (en) * 2018-10-24 2019-01-11 重庆科技学院 A kind of SCM Based blood oxygen detection method
US11647311B2 (en) 2021-01-14 2023-05-09 Semiconductor Components Industries, Llc Image sensor with delta sigma modulators and shared filters
EP4040682A1 (en) * 2021-02-05 2022-08-10 Imec VZW An analog-to-digital converter circuitry, an integrated circuit device, a photoplethysmogram detector, a wearable device and a method for analog-to-digital conversion

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62159518A (en) * 1985-12-30 1987-07-15 Oki Electric Ind Co Ltd Multiplex dela sigma (deltasigma) type analog-digital converter
EP0381764A1 (en) * 1988-06-09 1990-08-16 Asahi Kasei Microsystems Co., Ltd. Analog operation circuit
US5815102A (en) * 1996-06-12 1998-09-29 Audiologic, Incorporated Delta sigma pwm dac to reduce switching
US5913826A (en) * 1996-06-12 1999-06-22 K-One Technologies Wideband external pulse cardiac monitor
US5921921A (en) * 1996-12-18 1999-07-13 Nellcor Puritan-Bennett Pulse oximeter with sigma-delta converter
US6229466B1 (en) * 1999-08-23 2001-05-08 Level One Communications, Inc. Digital calibration method and apparatus for multi-bit delta-sigma D/A converter
US6360113B1 (en) * 1999-12-17 2002-03-19 Datex-Ohmeda, Inc. Photoplethysmographic instrument

Family Cites Families (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4802486A (en) 1985-04-01 1989-02-07 Nellcor Incorporated Method and apparatus for detecting optical pulses
US4934372A (en) 1985-04-01 1990-06-19 Nellcor Incorporated Method and apparatus for detecting optical pulses
US4928692A (en) 1985-04-01 1990-05-29 Goodman David E Method and apparatus for detecting optical pulses
US4911167A (en) 1985-06-07 1990-03-27 Nellcor Incorporated Method and apparatus for detecting optical pulses
US4802485A (en) * 1987-09-02 1989-02-07 Sentel Technologies, Inc. Sleep apnea monitor
US4851841A (en) * 1987-10-02 1989-07-25 Crystal Semiconductor Corporation Gain scaling of oversampled analog-to-digital converters
US4939516B1 (en) * 1988-06-13 1993-10-26 Crystal Semiconductor Corporation Chopper stabilized delta-sigma analog-to-digital converter
GB9103777D0 (en) * 1991-02-22 1991-04-10 B & W Loudspeakers Analogue and digital convertors
US5632272A (en) * 1991-03-07 1997-05-27 Masimo Corporation Signal processing apparatus
MX9702434A (en) * 1991-03-07 1998-05-31 Masimo Corp Signal processing apparatus.
EP0574509B1 (en) * 1991-03-07 1999-09-15 Masimo Corporation Signal processing apparatus and method
US5351685A (en) 1991-08-05 1994-10-04 Nellcor Incorporated Condensed oximeter system with noise reduction software
US5181032A (en) * 1991-09-09 1993-01-19 General Electric Company High-order, plural-bit-quantization sigma-delta modulators using single-bit digital-to-analog conversion feedback
DE69329837T2 (en) * 1992-04-30 2001-04-19 Hewlett Packard Co Differential integrating amplifier with switched capacitances to form precision resistors
US5368224A (en) 1992-10-23 1994-11-29 Nellcor Incorporated Method for reducing ambient noise effects in electronic monitoring instruments
US5368026A (en) 1993-03-26 1994-11-29 Nellcor Incorporated Oximeter with motion detection for alarm modification
JPH07249989A (en) * 1994-03-11 1995-09-26 Yamaha Corp Analog/digital converter
US5621408A (en) * 1995-02-24 1997-04-15 Lecroy Corporation Delta sigma analog-to-digital converter with temporally interleaved architecture
US5685301A (en) * 1995-06-16 1997-11-11 Ohmeda Inc. Apparatus for precise determination of operating characteristics of optical devices contained in a monitoring probe
US5746697A (en) 1996-02-09 1998-05-05 Nellcor Puritan Bennett Incorporated Medical diagnostic apparatus with sleep mode
US5745060A (en) * 1996-02-12 1998-04-28 Analog Devices, Inc. Gain calibration circuitry for an analog to digital converter
US5754131A (en) * 1996-07-01 1998-05-19 General Electric Company Low power delta sigma converter
US5907299A (en) * 1996-10-23 1999-05-25 Sonix Technologies, Inc. Analog-to digital converter with delta-sigma modulator
US6002952A (en) * 1997-04-14 1999-12-14 Masimo Corporation Signal processing apparatus and method
JP3369448B2 (en) * 1997-09-29 2003-01-20 シャープ株式会社 Digital switching amplifier
US6292121B1 (en) * 1998-01-09 2001-09-18 Lecroy Corporation Delta sigma-analog-to-digital converter
US6040793A (en) * 1998-03-18 2000-03-21 Analog Devices, Inc. Switched-capacitor sigma-delta analog-to-digital converter with input voltage overload protection
CN1127217C (en) * 1998-12-10 2003-11-05 印芬龙科技股份有限公司 Analog-digital converter
JP3551813B2 (en) * 1999-03-03 2004-08-11 横河電機株式会社 ΣΔ AD converter and flow velocity measuring device using the same
US6226539B1 (en) 1999-05-26 2001-05-01 Mallinckrodt, Inc. Pulse oximeter having a low power led drive
US6445302B2 (en) * 2000-02-14 2002-09-03 Anthony Vena Pet wireless doorbell device
JP2001237706A (en) * 2000-02-23 2001-08-31 Hitachi Ltd Δς-type a/d converter
JP3725001B2 (en) * 2000-03-28 2005-12-07 株式会社東芝 Selection circuit, D / A converter and A / D converter
US6473018B2 (en) * 2000-04-13 2002-10-29 Matsushita Electric Industrial Co., Ltd. Delta sigma analog-to-digital converter
US6346898B1 (en) * 2000-08-07 2002-02-12 Audio Logic, Inc. Multilevel analog to digital data converter having dynamic element matching in a reference data path
JP3962942B2 (en) * 2000-12-13 2007-08-22 横河電機株式会社 ΣΔ AD converter
JP4649777B2 (en) * 2001-02-09 2011-03-16 ソニー株式会社 Delta-sigma modulation apparatus and method, and digital signal processing apparatus and method
US6664908B2 (en) * 2001-09-21 2003-12-16 Honeywell International Inc. Synchronized pulse width modulator
JP4171222B2 (en) * 2002-02-08 2008-10-22 株式会社山武 Multi-input ΔΣ modulation circuit
US6674381B1 (en) * 2003-02-28 2004-01-06 Texas Instruments Incorporated Methods and apparatus for tone reduction in sigma delta modulators

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62159518A (en) * 1985-12-30 1987-07-15 Oki Electric Ind Co Ltd Multiplex dela sigma (deltasigma) type analog-digital converter
EP0381764A1 (en) * 1988-06-09 1990-08-16 Asahi Kasei Microsystems Co., Ltd. Analog operation circuit
US5815102A (en) * 1996-06-12 1998-09-29 Audiologic, Incorporated Delta sigma pwm dac to reduce switching
US5913826A (en) * 1996-06-12 1999-06-22 K-One Technologies Wideband external pulse cardiac monitor
US5921921A (en) * 1996-12-18 1999-07-13 Nellcor Puritan-Bennett Pulse oximeter with sigma-delta converter
US6229466B1 (en) * 1999-08-23 2001-05-08 Level One Communications, Inc. Digital calibration method and apparatus for multi-bit delta-sigma D/A converter
US6360113B1 (en) * 1999-12-17 2002-03-19 Datex-Ohmeda, Inc. Photoplethysmographic instrument

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ANONYMOUS: "PIC16C63A/65B/73B/74B - 8-Bit CMOS Microcontrollers with A/D Converter", 18 February 2003, MICROCHIP TECHNOLOGY INC, XP002329893 *
NORSWORTHY S R ET AL: "A 14-BIT 80-KHZ SIGMA-DELTA A/D CONVERTER: MODELING, DESIGN AND PERFORMANCE EVALUATION", IEEE JOURNAL OF SOLID-STATE CIRCUITS, IEEE INC. NEW YORK, US, vol. 24, no. 2, 1 April 1989 (1989-04-01), pages 256 - 266, XP000122348, ISSN: 0018-9200 *
PATENT ABSTRACTS OF JAPAN vol. 011, no. 396 (E - 568) 24 December 1987 (1987-12-24) *

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