TWI363875B - Current-voltage conversion circuit - Google Patents

Current-voltage conversion circuit Download PDF

Info

Publication number
TWI363875B
TWI363875B TW094113729A TW94113729A TWI363875B TW I363875 B TWI363875 B TW I363875B TW 094113729 A TW094113729 A TW 094113729A TW 94113729 A TW94113729 A TW 94113729A TW I363875 B TWI363875 B TW I363875B
Authority
TW
Taiwan
Prior art keywords
voltage source
signal voltage
capacitor
operational amplifier
conversion circuit
Prior art date
Application number
TW094113729A
Other languages
English (en)
Chinese (zh)
Other versions
TW200600798A (en
Inventor
Kenji Kato
Original Assignee
Seiko Instr Inc
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 Seiko Instr Inc filed Critical Seiko Instr Inc
Publication of TW200600798A publication Critical patent/TW200600798A/zh
Application granted granted Critical
Publication of TWI363875B publication Critical patent/TWI363875B/zh

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
    • G01R27/2605—Measuring capacitance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16528—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values using digital techniques or performing arithmetic operations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • G01R23/06—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into an amplitude of current or voltage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Amplifiers (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Measurement Of Current Or Voltage (AREA)
TW094113729A 2004-05-12 2005-04-28 Current-voltage conversion circuit TWI363875B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004141942 2004-05-12
JP2005038180A JP4811987B2 (ja) 2004-05-12 2005-02-15 Ｃｖ変換回路

Publications (2)

Publication Number Publication Date
TW200600798A TW200600798A (en) 2006-01-01
TWI363875B true TWI363875B (en) 2012-05-11

Family

ID=35586478

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094113729A TWI363875B (en) 2004-05-12 2005-04-28 Current-voltage conversion circuit

Country Status (3)

Country Link
JP (1) JP4811987B2 (ja)
KR (1) KR101074981B1 (ja)
TW (1) TWI363875B (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5225410B2 (ja) * 2011-03-02 2013-07-03 日本航空電子工業株式会社 容量検出装置、抵抗検出装置
KR102212812B1 (ko) * 2014-09-03 2021-02-09 주식회사 센트론 상호 커패시턴스 값의 검출을 위한 프론트엔드 장치

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53147577A (en) * 1977-05-27 1978-12-22 Hokushin Electric Works Capacity converter
JPH0672901B2 (ja) * 1985-11-22 1994-09-14 日東工器株式会社 静電容量−電圧変換回路
JPS62182673A (ja) * 1986-02-06 1987-08-11 Yokogawa Electric Corp 容量変換装置
JP2000234939A (ja) * 1998-12-18 2000-08-29 Yazaki Corp 静電容量−電圧変換装置
JP4072030B2 (ja) * 2001-09-06 2008-04-02 東京エレクトロン株式会社 センサ容量検出装置及びセンサ容量検出方法

Also Published As

Publication number Publication date
JP2005351885A (ja) 2005-12-22
TW200600798A (en) 2006-01-01
KR20060047823A (ko) 2006-05-18
KR101074981B1 (ko) 2011-10-18
JP4811987B2 (ja) 2011-11-09

Similar Documents

Publication Publication Date Title
TWI489357B (zh) 使用類比至數位轉換器之內部電容器及參考電壓之電容式接觸感測
US8913033B2 (en) Projected capacitive touch sensor circuit
CN102012464B (zh) 一种微电容测量方法及专用装置
TW201517514A (zh) 使用三角積分轉換之電容近接偵測
JPH0862266A (ja) 静電容量変化量検出装置
JP2004279261A (ja) 物理量検出装置
TWI363875B (en) Current-voltage conversion circuit
CN111693784A (zh) 一种微弱电容变化测量电路
US9903891B2 (en) Capacitive sensor
JP2005140657A (ja) 静電容量型センサの容量変化検出回路
JP4269388B2 (ja) 容量式物理量検出装置
JP4886077B2 (ja) Ｃｖ変換回路
US7224193B2 (en) Current-voltage conversion circuit
JP4150292B2 (ja) 異常検出機能を持つ静電容量式センサ装置
JP2007121125A (ja) 電流検出装置および静電容量測定装置
JPH06222032A (ja) 静電容量式アルコール濃度測定装置
Vooka et al. A novel capacitance-to-digital converter for capacitive sensors with AC excitation
JP5632398B2 (ja) インピーダンスをデジタル化する装置及び方法
JPH0415516A (ja) 変位測定回路
JP2008306679A (ja) 静電容量変化検出回路
JP2005315824A (ja) Ｃｖ変換回路
Vooka et al. A capacitance-to-digital converter with sinusoidal excitation suitable for series RC sensors
Miyazaki et al. Microcontroller-based lock-in amplifier: a comparative study
CN116794400A (zh) Lcr阻抗测量装置及其测量方法
JPS63293475A (ja) デュ−ティ比測定方式

Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees