FR2436399A2 - Perfectionnement a l'inhibition des capacites parasites dans un dispositif de mesure de capacite - Google Patents

Perfectionnement a l'inhibition des capacites parasites dans un dispositif de mesure de capacite

Info

Publication number
FR2436399A2
FR2436399A2 FR7826295A FR7826295A FR2436399A2 FR 2436399 A2 FR2436399 A2 FR 2436399A2 FR 7826295 A FR7826295 A FR 7826295A FR 7826295 A FR7826295 A FR 7826295A FR 2436399 A2 FR2436399 A2 FR 2436399A2
Authority
FR
France
Prior art keywords
counter
down counter
measuring device
memory system
circuit including
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.)
Granted
Application number
FR7826295A
Other languages
English (en)
Other versions
FR2436399B2 (fr
Inventor
Gilbert Dauge
Jacques Langlais
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.)
Testut Aequitas SA
Original Assignee
Testut Aequitas SA
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 Testut Aequitas SA filed Critical Testut Aequitas SA
Priority to FR7826295A priority Critical patent/FR2436399A2/fr
Priority to SE7809966A priority patent/SE431683B/sv
Priority to GB7837875A priority patent/GB2006970B/en
Priority to DE2842028A priority patent/DE2842028C3/de
Priority to US05/945,413 priority patent/US4187460A/en
Priority to CA311,976A priority patent/CA1099340A/fr
Priority to IT84136/78A priority patent/IT1107425B/it
Priority to JP12125478A priority patent/JPS5539088A/ja
Publication of FR2436399A2 publication Critical patent/FR2436399A2/fr
Application granted granted Critical
Publication of FR2436399B2 publication Critical patent/FR2436399B2/fr
Granted legal-status Critical Current

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
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G01R19/252—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques using analogue/digital converters of the type with conversion of voltage or current into frequency and measuring of this frequency

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

a. Dispositif de mesure de la capacité d'un condensateur au moyen d'un cycle de comparaison des périodes de charge et de décharge dudit condensateur et d'un condensateur d'étalonnage respectivement pendant deux phases successives de mesure et d'étalonnage b. Le dispositif comprend un oscillateur à relaxation 10, un amplificateur 107 du type circuit intégrateur à gain élevé et à entrée inverse 107 reliée à des armatures 1001, 1041 blindées du potentiel de terre des condensateurs 100, 104, des moyens il pour commuter alternativement au cours de chaque phase l'autre armature 1000, 1040 de l'un des condensateurs à la sortie de l'amplificateur et des moyens 2 pour compter les impulsions délivrées par l'oscillateur au cours de chaque phase et pour déterminer les durées constantes des phases. c. Mesure de capacité
FR7826295A 1977-09-23 1978-09-13 Perfectionnement a l'inhibition des capacites parasites dans un dispositif de mesure de capacite Granted FR2436399A2 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
FR7826295A FR2436399A2 (fr) 1978-09-13 1978-09-13 Perfectionnement a l'inhibition des capacites parasites dans un dispositif de mesure de capacite
GB7837875A GB2006970B (en) 1977-09-23 1978-09-22 Capacitance measuring device
SE7809966A SE431683B (sv) 1977-09-23 1978-09-22 Anordning for metning av kapacitansen hos en kondensator
US05/945,413 US4187460A (en) 1977-09-23 1978-09-25 Capacitance measuring by comparison to reference capacitance
DE2842028A DE2842028C3 (de) 1977-09-23 1978-09-25 Vorrichtung zum Messen der Kapazität eines Kondensators
CA311,976A CA1099340A (fr) 1977-09-23 1978-09-25 Traduction non-disponible
IT84136/78A IT1107425B (it) 1977-09-23 1978-09-25 Dispositivo per misurare la capacita' di un condensatore
JP12125478A JPS5539088A (en) 1978-09-13 1978-10-03 Electrostatic capacity meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7826295A FR2436399A2 (fr) 1978-09-13 1978-09-13 Perfectionnement a l'inhibition des capacites parasites dans un dispositif de mesure de capacite

Publications (2)

Publication Number Publication Date
FR2436399A2 true FR2436399A2 (fr) 1980-04-11
FR2436399B2 FR2436399B2 (fr) 1981-11-06

Family

ID=9212604

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7826295A Granted FR2436399A2 (fr) 1977-09-23 1978-09-13 Perfectionnement a l'inhibition des capacites parasites dans un dispositif de mesure de capacite

Country Status (2)

Country Link
JP (1) JPS5539088A (fr)
FR (1) FR2436399A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2584822A1 (fr) * 1985-07-09 1987-01-16 Thomson Csf Dispositif de mesure du rapport de deux capacites de faibles valeurs

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4791352A (en) * 1986-07-17 1988-12-13 Rosemount Inc. Transmitter with vernier measurement

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2142732A1 (fr) * 1971-06-24 1973-02-02 Commissariat Energie Atomique
FR2254779A1 (fr) * 1973-12-18 1975-07-11 Roulements Soc Nouvelle

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4875250A (fr) * 1972-01-12 1973-10-11

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2142732A1 (fr) * 1971-06-24 1973-02-02 Commissariat Energie Atomique
FR2254779A1 (fr) * 1973-12-18 1975-07-11 Roulements Soc Nouvelle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2584822A1 (fr) * 1985-07-09 1987-01-16 Thomson Csf Dispositif de mesure du rapport de deux capacites de faibles valeurs
US4797603A (en) * 1985-07-09 1989-01-10 Thomson-Csf Device for measuring the ratio of two low value capacities

Also Published As

Publication number Publication date
JPS5539088A (en) 1980-03-18
FR2436399B2 (fr) 1981-11-06

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