NO20032011L - Elektrostatisk kapasitansdetekteringskrets, elektrostatisk kapasitansdetekteringsanordning og mikrofonanordning - Google Patents

Elektrostatisk kapasitansdetekteringskrets, elektrostatisk kapasitansdetekteringsanordning og mikrofonanordning

Info

Publication number
NO20032011L
NO20032011L NO20032011A NO20032011A NO20032011L NO 20032011 L NO20032011 L NO 20032011L NO 20032011 A NO20032011 A NO 20032011A NO 20032011 A NO20032011 A NO 20032011A NO 20032011 L NO20032011 L NO 20032011L
Authority
NO
Norway
Prior art keywords
electrostatic capacitance
capacitance detection
operational amplifier
inverting input
detection circuit
Prior art date
Application number
NO20032011A
Other languages
English (en)
Other versions
NO20032011D0 (no
Inventor
Masami Yakabe
Naoki Ikeuchi
Original Assignee
Sumitomo Metal Ind
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 Sumitomo Metal Ind filed Critical Sumitomo Metal Ind
Publication of NO20032011D0 publication Critical patent/NO20032011D0/no
Publication of NO20032011L publication Critical patent/NO20032011L/no

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00—Monitoring arrangements; Testing arrangements
    • H04R29/004—Monitoring arrangements; Testing arrangements for microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/04—Microphones
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Otolaryngology (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

En elektrostatisk kapasitansdetekteringskrets (10) omfatter en vekselstrømspennings-generator (11), en første operasjonsforsterker (14) hvis ikke-inverterende inngangsterminal er tilkoblet et spesifikt potensiale (et jordpotensiale i dette eksemplet), en andre operasjonsforsterker (16) som innbefatter en spenningsfølger, en motstand (RI) (12) forbundet mellom vekselstrømsspenningsgeneratoren (11) og en inverterende irmgangsterminal til den første operasjonsforsterkeren (14), en motstand (R2) (13) tilkoblet mellom den inverterende inngangsterminalen til den første operasjonsforsterkeren (14) og en utgangsterminal til den andre operasjonsforsterkeren (16), og et impedanselement (en kondensator) (15) tilkoblet mellom en utgangsterminal til den første operasjonsforsterkeren (14) og en ikke-inverterende inngangsterminal til den andre operasjonsforsterkeren (16), og en kondensator som skal detekteres (17), er tilkoblet mellom den ikke-inverterende inngangsterminalen til den andre operasjonsforsterkeren (16) og det spesifikke potensialet. Den elektrostatiske kapasitansdetekteringskretsen (10) og kondensatoren (17) er anordnet tilstøtende til hverandre.
NO20032011A 2001-09-06 2003-05-05 Elektrostatisk kapasitansdetekteringskrets, elektrostatisk kapasitansdetekteringsanordning og mikrofonanordning NO20032011L (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001269992 2001-09-06
PCT/JP2002/009139 WO2003023422A1 (fr) 2001-09-06 2002-09-06 Circuit de mesure de la capacite, instrument de mesure de la capacite et dispositif de microphone

Publications (2)

Publication Number Publication Date
NO20032011D0 NO20032011D0 (no) 2003-05-05
NO20032011L true NO20032011L (no) 2003-07-03

Family

ID=19095711

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20032011A NO20032011L (no) 2001-09-06 2003-05-05 Elektrostatisk kapasitansdetekteringskrets, elektrostatisk kapasitansdetekteringsanordning og mikrofonanordning

Country Status (8)

Country Link
US (1) US7034551B2 (no)
EP (1) EP1424563B1 (no)
KR (1) KR100715063B1 (no)
CN (1) CN1271415C (no)
AT (1) ATE475102T1 (no)
DE (1) DE60237092D1 (no)
NO (1) NO20032011L (no)
WO (1) WO2003023422A1 (no)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
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US7398072B2 (en) * 2004-08-31 2008-07-08 Research In Motion Limited Mobile wireless communications device with reduced microphone noise from radio frequency communications circuitry
US20060055415A1 (en) * 2004-09-15 2006-03-16 Mark Takita Environmentally compensated capacitive sensor
US8487639B1 (en) * 2008-11-21 2013-07-16 Cypress Semiconductor Corporation Receive demodulator for capacitive sensing
US8866500B2 (en) 2009-03-26 2014-10-21 Cypress Semiconductor Corporation Multi-functional capacitance sensing circuit with a current conveyor
US9268441B2 (en) 2011-04-05 2016-02-23 Parade Technologies, Ltd. Active integrator for a capacitive sense array
CN102435862B (zh) * 2011-10-29 2014-05-28 中北大学 微小电容的测试方法
CN102749525B (zh) * 2012-06-05 2015-05-20 泰凌微电子（上海）有限公司 电容检测方法及电容检测电路
EP2675188B1 (en) * 2012-06-12 2015-08-05 ams AG Sensor arrangement and method for generating an amplified sensor signal
DE102012220137A1 (de) * 2012-11-06 2014-05-08 Robert Bosch Gmbh Schaltungsanordnung und Verfahren zum Prüfen eines Mikrofons sowie System zum Betreiben eines Mikrofons mit einer derartigen Schaltungsanordnung
US10309997B2 (en) 2013-03-15 2019-06-04 Infineon Technologies Ag Apparatus and a method for generating a sensor signal indicating information on a capacitance of a variable capacitor comprising a variable capacitance
CN103439579A (zh) * 2013-08-30 2013-12-11 昆山奥德鲁自动化技术有限公司 一种经济型阻抗测量回路
CN103439578A (zh) * 2013-08-30 2013-12-11 昆山奥德鲁自动化技术有限公司 一种阻抗测量电路
JP6960831B2 (ja) * 2017-11-17 2021-11-05 エイブリック株式会社 センサ装置
CN108120859B (zh) * 2017-12-29 2024-04-12 国网江苏省电力有限公司检修分公司 一种主动式电磁屏蔽发生装置
CN112394226A (zh) * 2019-08-16 2021-02-23 Oppo广东移动通信有限公司 信号检测电路和电子设备
CN112014648B (zh) * 2020-08-10 2023-04-28 南京天易合芯电子有限公司 一种可以检测单侧电容的电容检测方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3007426A1 (de) 1980-02-28 1981-09-03 Ewald Max Christian Dipl.-Phys. 6000 Frankfurt Hennig Schaltungsanordnung mit einem kondensator im rueckkopplungszweig eines operationsverstaerkers
DE3221800A1 (de) 1982-06-05 1983-12-08 Martin Dipl Ing Kueper Messmethode zur bestimmung von lautsprecherdaten
US4918376A (en) * 1989-03-07 1990-04-17 Ade Corporation A.C. capacitive gauging system
JPH09280806A (ja) * 1996-04-09 1997-10-31 Nissan Motor Co Ltd 静電容量式変位計
EP0970386B8 (en) * 1998-01-23 2006-06-21 Tokyo Electron Limited Impedance-to-voltage converter
TW526327B (en) * 1998-02-19 2003-04-01 Sumitomo Metal Ind Detection apparatus and method of physical variable
JP4124867B2 (ja) * 1998-07-14 2008-07-23 松下電器産業株式会社 変換装置
TW546480B (en) 2000-03-07 2003-08-11 Sumitomo Metal Ind Circuit, apparatus and method for inspecting impedance
JP3501401B2 (ja) * 2000-03-07 2004-03-02 住友金属工業株式会社 インピーダンス検出回路、インピーダンス検出装置、及びインピーダンス検出方法
JP3454426B2 (ja) * 2000-07-10 2003-10-06 住友金属工業株式会社 インピーダンス検出回路及びインピーダンス検出方法
JP3501398B2 (ja) * 2000-07-10 2004-03-02 住友金属工業株式会社 インピーダンス検出回路及びインピーダンス検出方法
JP2002157671A (ja) * 2000-11-16 2002-05-31 Sumitomo Metal Ind Ltd センシングシステム

Also Published As

Publication number Publication date
CN1551987A (zh) 2004-12-01
ATE475102T1 (de) 2010-08-15
EP1424563A4 (en) 2006-02-15
US7034551B2 (en) 2006-04-25
US20050040833A1 (en) 2005-02-24
EP1424563A1 (en) 2004-06-02
NO20032011D0 (no) 2003-05-05
KR100715063B1 (ko) 2007-05-04
DE60237092D1 (de) 2010-09-02
WO2003023422A1 (fr) 2003-03-20
EP1424563B1 (en) 2010-07-21
CN1271415C (zh) 2006-08-23
KR20040044853A (ko) 2004-05-31

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