TW200600798A - Current-voltage conversion circuit - Google Patents

Current-voltage conversion circuit

Info

Publication number
TW200600798A
TW200600798A TW094113729A TW94113729A TW200600798A TW 200600798 A TW200600798 A TW 200600798A TW 094113729 A TW094113729 A TW 094113729A TW 94113729 A TW94113729 A TW 94113729A TW 200600798 A TW200600798 A TW 200600798A
Authority
TW
Taiwan
Prior art keywords
conversion circuit
current
voltage conversion
capacitances
circuit
Prior art date
Application number
TW094113729A
Other languages
Chinese (zh)
Other versions
TWI363875B (en
Inventor
Minoru Sudou
Mitsuo Yarita
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/en
Application granted granted Critical
Publication of TWI363875B publication Critical patent/TWI363875B/en

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)

Abstract

A CV conversion circuit capable of measuring a plurality of capacitances with a simple circuit is provided. A time-division signal is applied to each capacitor, whereby a plurality of capacitances of the capacitors can be measured in series by a circuit with a small number of components.
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 (en) 2004-05-12 2005-02-15 CV conversion circuit

Publications (2)

Publication Number Publication Date
TW200600798A true TW200600798A (en) 2006-01-01
TWI363875B 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 (en)
KR (1) KR101074981B1 (en)
TW (1) TWI363875B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5225410B2 (en) * 2011-03-02 2013-07-03 日本航空電子工業株式会社 Capacitance detection device, resistance detection device
KR102212812B1 (en) * 2014-09-03 2021-02-09 주식회사 센트론 Device of front-end for reading out mutual capacitance value

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 (en) * 1985-11-22 1994-09-14 日東工器株式会社 Capacitance-voltage conversion circuit
JPS62182673A (en) * 1986-02-06 1987-08-11 Yokogawa Electric Corp Capacity converter
JP2000234939A (en) * 1998-12-18 2000-08-29 Yazaki Corp Electrostatic capacitance-voltage converter
JP4072030B2 (en) * 2001-09-06 2008-04-02 東京エレクトロン株式会社 Sensor capacity detection device and sensor capacity detection method

Also Published As

Publication number Publication date
KR20060047823A (en) 2006-05-18
JP4811987B2 (en) 2011-11-09
KR101074981B1 (en) 2011-10-18
JP2005351885A (en) 2005-12-22
TWI363875B (en) 2012-05-11

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Legal Events

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