WO2015114667A3 - Signal acquisition using a multi-frequency chopping in a single circuitry - Google Patents

Signal acquisition using a multi-frequency chopping in a single circuitry Download PDF

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Publication number
WO2015114667A3
WO2015114667A3 PCT/IN2015/000058 IN2015000058W WO2015114667A3 WO 2015114667 A3 WO2015114667 A3 WO 2015114667A3 IN 2015000058 W IN2015000058 W IN 2015000058W WO 2015114667 A3 WO2015114667 A3 WO 2015114667A3
Authority
WO
WIPO (PCT)
Prior art keywords
chopping
signals
level
frequency
signal acquisition
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.)
Ceased
Application number
PCT/IN2015/000058
Other languages
French (fr)
Other versions
WO2015114667A2 (en
Inventor
G. Sujan KUMAR
S Aniruddhan
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.)
Indian Institute of Technology Madras
Original Assignee
Indian Institute of Technology Madras
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 Indian Institute of Technology Madras filed Critical Indian Institute of Technology Madras
Publication of WO2015114667A2 publication Critical patent/WO2015114667A2/en
Publication of WO2015114667A3 publication Critical patent/WO2015114667A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • A61B5/7225—Details of analogue processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/30—Input circuits therefor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/211—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/38—DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers
    • H03F3/387—DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers with semiconductor devices only

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Physics & Mathematics (AREA)
  • Public Health (AREA)
  • Pathology (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physiology (AREA)
  • Psychiatry (AREA)
  • Analogue/Digital Conversion (AREA)
  • Amplifiers (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

The present invention discloses a method and system for processing a plurality of signals together in a single circuitry using a multi-frequency chopping. The system is configured to include a first level chopping, an amplifier for amplification, a second level chopping, a filter for filtration and an Analog to Digital Converter (ADC). The system is further configured to receive low frequency input signals and apply the first level of chopping by translating signals to a higher frequency. Further, the system is configured to amplify the signals and apply the second level of chopping to translate the signal back to original frequency. During second level of chopping, signals are translated to new frequencies other than their baseband by chopping each signal at a different frequency. Further, the signals are combined into a single signal and send to an Analog-to-Digital Converter (ADC) for digitizing.
PCT/IN2015/000058 2014-01-29 2015-01-29 Signal acquisition using a multi-frequency chopping in a single circuitry Ceased WO2015114667A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN400/CHE/2014 2014-01-29
IN400CH2014 IN2014CH00400A (en) 2014-01-29 2015-01-29

Publications (2)

Publication Number Publication Date
WO2015114667A2 WO2015114667A2 (en) 2015-08-06
WO2015114667A3 true WO2015114667A3 (en) 2015-11-05

Family

ID=53757867

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2015/000058 Ceased WO2015114667A2 (en) 2014-01-29 2015-01-29 Signal acquisition using a multi-frequency chopping in a single circuitry

Country Status (2)

Country Link
IN (1) IN2014CH00400A (en)
WO (1) WO2015114667A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113827249B (en) * 2021-09-28 2022-03-01 之江实验室 Method for eliminating multichannel gain error of electroencephalogram signal acquisition system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7170338B1 (en) * 2005-03-24 2007-01-30 Cirrus Logic, Inc. Chopper stabilization circuits and methods
US8471744B1 (en) * 2011-12-01 2013-06-25 Hong Kong Applied Science & Technology Research Institute Company, Ltd. Reduced residual offset sigma delta analog-to-digital converter (ADC) with chopper timing at end of integrating phase before trailing edge

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7170338B1 (en) * 2005-03-24 2007-01-30 Cirrus Logic, Inc. Chopper stabilization circuits and methods
US8471744B1 (en) * 2011-12-01 2013-06-25 Hong Kong Applied Science & Technology Research Institute Company, Ltd. Reduced residual offset sigma delta analog-to-digital converter (ADC) with chopper timing at end of integrating phase before trailing edge

Also Published As

Publication number Publication date
IN2014CH00400A (en) 2015-08-07
WO2015114667A2 (en) 2015-08-06

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