FR2454617A1 - Appareil pour creer une tension inversement proportionnelle a la capacite d'un condensateur variable - Google Patents

Appareil pour creer une tension inversement proportionnelle a la capacite d'un condensateur variable

Info

Publication number
FR2454617A1
FR2454617A1 FR8006635A FR8006635A FR2454617A1 FR 2454617 A1 FR2454617 A1 FR 2454617A1 FR 8006635 A FR8006635 A FR 8006635A FR 8006635 A FR8006635 A FR 8006635A FR 2454617 A1 FR2454617 A1 FR 2454617A1
Authority
FR
France
Prior art keywords
variable capacitor
creating
capacity
proportional voltage
reverse proportional
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
FR8006635A
Other languages
English (en)
Other versions
FR2454617B1 (fr
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.)
Motorola Solutions Inc
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Publication of FR2454617A1 publication Critical patent/FR2454617A1/fr
Application granted granted Critical
Publication of FR2454617B1 publication Critical patent/FR2454617B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/12—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in capacitance, i.e. electric circuits therefor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Amplifiers (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

A.APPAREIL POUR CREER UNE TENSION INVERSEMENT PROPORTIONNELLE A LA CAPACITE D'UN CONDENSATEUR VARIABLE. B.APPAREIL CARACTERISE EN CE QUE LE PREMIER MOYEN COMPORTE UN TROISIEME MOYEN 4, UN PREMIER COMPARATEUR 6 COUPLE SUR LE TROISIEME MOYEN 4 ET LE CONDENSATEUR DE REFERENCE C, ET UN SECOND COMPARATEUR 8 COUPLE SUR LE TROISIEME MOYEN 4 ET LE CONDENSATEUR VARIABLE C. C.L'INVENTION S'APPLIQUE AU CAPTEUR CAPACITIF DE PRESSION.
FR8006635A 1979-04-19 1980-03-25 Appareil pour creer une tension inversement proportionnelle a la capacite d'un condensateur variable Granted FR2454617A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/031,884 US4250452A (en) 1979-04-19 1979-04-19 Pressure sensitive transducer circuits

Publications (2)

Publication Number Publication Date
FR2454617A1 true FR2454617A1 (fr) 1980-11-14
FR2454617B1 FR2454617B1 (fr) 1983-12-09

Family

ID=21861911

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8006635A Granted FR2454617A1 (fr) 1979-04-19 1980-03-25 Appareil pour creer une tension inversement proportionnelle a la capacite d'un condensateur variable

Country Status (4)

Country Link
US (1) US4250452A (fr)
JP (2) JPS55142251A (fr)
DE (1) DE3014657C2 (fr)
FR (1) FR2454617A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4392382A (en) * 1981-03-09 1983-07-12 Motorola Inc. Linearized electronic capacitive pressure transducer
US4398426A (en) * 1981-07-02 1983-08-16 Kavlico Corporation Linear capacitive pressure transducer system
US4449409A (en) * 1981-07-13 1984-05-22 The Bendix Corporation Pressure measurement system with a constant settlement time
US4550611A (en) * 1984-01-05 1985-11-05 Motorola, Inc. Electronic pressure transducer
US4656871A (en) * 1985-07-16 1987-04-14 Motorola, Inc. Capacitor sensor and method
JPS62211533A (ja) * 1986-03-13 1987-09-17 Yokogawa Electric Corp 容量式変換装置
US4831325A (en) * 1987-04-01 1989-05-16 General Signal Corporation Capacitance measuring circuit
US5296750A (en) * 1992-10-02 1994-03-22 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Measurand transient signal suppressor
US5535752A (en) * 1995-02-27 1996-07-16 Medtronic, Inc. Implantable capacitive absolute pressure and temperature monitor system
US5759870A (en) * 1995-08-28 1998-06-02 Bei Electronics, Inc. Method of making a surface micro-machined silicon pressure sensor
US6171252B1 (en) * 1999-04-29 2001-01-09 Medtronic, Inc. Pressure sensor with increased sensitivity for use with an implantable medical device
US8836349B2 (en) 2012-08-15 2014-09-16 Robert Bosch Gmbh Capacitive sensor
US9869599B2 (en) * 2014-09-30 2018-01-16 Rosemount Inc. High-temperature pressure sensing
US9897504B2 (en) * 2015-04-20 2018-02-20 Infineon Technologies Ag System and method for a MEMS sensor
JP2020020620A (ja) * 2018-07-31 2020-02-06 デクセリアルズ株式会社 センサ装置、センサモジュール及び感圧検出方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB939660A (en) * 1959-11-20 1963-10-16 Carl Gustav Hansson Apparatus and method for measuring capacitance
US3462692A (en) * 1967-03-27 1969-08-19 Bliss Co Pedestrian detection system
FR2205669A1 (fr) * 1972-11-03 1974-05-31 Robertshaw Controls Co
FR2298113A1 (fr) * 1975-01-20 1976-08-13 Rosemount Inc Emetteur

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3384789A (en) * 1964-10-19 1968-05-21 James M Morita Approach switch apparatus
US4054833A (en) * 1976-06-11 1977-10-18 Setra Systems, Inc. Capacitance measuring system
AT359599B (de) * 1977-02-03 1980-11-25 Elin Union Ag Elektronische kapazitaetsmesseinrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB939660A (en) * 1959-11-20 1963-10-16 Carl Gustav Hansson Apparatus and method for measuring capacitance
US3462692A (en) * 1967-03-27 1969-08-19 Bliss Co Pedestrian detection system
FR2205669A1 (fr) * 1972-11-03 1974-05-31 Robertshaw Controls Co
FR2298113A1 (fr) * 1975-01-20 1976-08-13 Rosemount Inc Emetteur

Also Published As

Publication number Publication date
JPS55142251A (en) 1980-11-06
DE3014657A1 (de) 1980-11-06
FR2454617B1 (fr) 1983-12-09
DE3014657C2 (de) 1985-01-31
JPH0166076U (fr) 1989-04-27
US4250452A (en) 1981-02-10

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Legal Events

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ST Notification of lapse