CA980443A - Transducer circuitry for converting a capacitance signal to a dc current signal - Google Patents

Transducer circuitry for converting a capacitance signal to a dc current signal

Info

Publication number
CA980443A
CA980443A CA096,048A CA96048A CA980443A CA 980443 A CA980443 A CA 980443A CA 96048 A CA96048 A CA 96048A CA 980443 A CA980443 A CA 980443A
Authority
CA
Canada
Prior art keywords
signal
converting
transducer circuitry
capacitance
current signal
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.)
Expired
Application number
CA096,048A
Other languages
English (en)
Inventor
Roger L. Frick
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.)
Rosemount Inc
Original Assignee
Rosemount 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25353907&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA980443(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Rosemount Inc filed Critical Rosemount Inc
Priority to CA189,887A priority Critical patent/CA960309A/en
Priority to CA240,892A priority patent/CA999930A/en
Application granted granted Critical
Publication of CA980443A publication Critical patent/CA980443A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage
    • G08C19/10—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage using variable capacitance

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Measuring Fluid Pressure (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
CA096,048A 1969-10-27 1970-10-20 Transducer circuitry for converting a capacitance signal to a dc current signal Expired CA980443A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA189,887A CA960309A (en) 1969-10-27 1974-01-10 Transducer circuitry for converting a capacitance signal to a dc current signal
CA240,892A CA999930A (en) 1969-10-27 1975-12-02 Transducer circuitry for converting a capacitance signal to a dc current signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86960869A 1969-10-27 1969-10-27

Publications (1)

Publication Number Publication Date
CA980443A true CA980443A (en) 1975-12-23

Family

ID=25353907

Family Applications (1)

Application Number Title Priority Date Filing Date
CA096,048A Expired CA980443A (en) 1969-10-27 1970-10-20 Transducer circuitry for converting a capacitance signal to a dc current signal

Country Status (7)

Country Link
US (1) US3646538A (da)
JP (4) JPS5031459B1 (da)
CA (1) CA980443A (da)
DE (1) DE2052520A1 (da)
FR (1) FR2066530A5 (da)
GB (1) GB1335349A (da)
IL (1) IL35539A (da)

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3735371A (en) * 1971-06-02 1973-05-22 Sun Oil Co Pennsylvania Arrangement for multiplexing of a plurality of remotely-located capacitive probes
US3854039A (en) * 1973-04-30 1974-12-10 Rosemont Inc Current transmitter circuitry to provide an output varying as the square root of a measured variable condition
US3993947A (en) * 1974-09-19 1976-11-23 Drexelbrook Controls, Inc. Admittance measuring system for monitoring the condition of materials
US3975719A (en) * 1975-01-20 1976-08-17 Rosemount Inc. Transducer for converting a varying reactance signal to a DC current signal
JPS5818678B2 (ja) * 1975-08-25 1983-04-14 横河電機株式会社 変位電気信号変換装置
JPS5358663A (en) * 1976-11-09 1978-05-26 Omron Tateisi Electronics Co Electromagnet
CH620537A5 (en) * 1977-03-03 1980-11-28 Bauer Messinstrumente Ag Device for reducing losses and thus for improving the transfer characteristic at a measurement-value transformer
JPS5421158U (da) * 1977-07-15 1979-02-10
CA1123225A (en) * 1978-02-15 1982-05-11 Bendix Corporation (The) Compensated capacitive transducer demodulator circuit
FR2423753A1 (fr) * 1978-04-18 1979-11-16 Chauvin Arnoux Sa Dispositif de transmission par variation de charge d'un signal analogique alternatif provenant d'un capteur
US4193063A (en) * 1978-05-15 1980-03-11 Leeds & Northrup Company Differential capacitance measuring circuit
JPS5928845B2 (ja) * 1978-08-17 1984-07-16 富士電機株式会社 変位変換装置
DE2901516C2 (de) * 1979-01-16 1985-01-24 VEGA Grieshaber GmbH & Co, 7620 Wolfach Anordnung zur Erzeugung eines einer Kapazität proportionalen Signals
US4250490A (en) * 1979-01-19 1981-02-10 Rosemount Inc. Two wire transmitter for converting a varying signal from a remote reactance sensor to a DC current signal
US4389646A (en) * 1980-04-30 1983-06-21 Fuji Electric Co. Ltd. Displacement converting circuit arrangement
US4339750A (en) * 1980-08-20 1982-07-13 Rosemount Inc. Low power transmitter
US4331912A (en) * 1980-10-06 1982-05-25 Rosemount Inc. Circuit for converting a non-live zero current signal to a live zero DC output signal
US4381677A (en) * 1981-01-23 1983-05-03 Rosemount Inc. Reactance measurement circuit
JPS59613A (ja) * 1982-06-28 1984-01-05 Fuji Electric Co Ltd 二線式変位変換装置
US4502003A (en) * 1983-07-29 1985-02-26 Rosemount Inc. Two wire circuit having an adjustable span
JPS61501654A (ja) * 1984-03-30 1986-08-07 ロ−ズマウント　インコ． 圧力補正型差圧センサと方法
US4982351A (en) * 1986-05-05 1991-01-01 Texas Instruments Incorporated Low cost high precision sensor
US5051937A (en) * 1986-05-05 1991-09-24 Texas Instruments Incorporated Low cost high precision sensor
US4818948A (en) * 1986-08-05 1989-04-04 Pratt & Whitney Canada Inc. Capacitive bridge-type probe for measuring blade tip clearance
US4783659A (en) * 1986-08-22 1988-11-08 Rosemount Inc. Analog transducer circuit with digital control
US4741214A (en) * 1986-09-19 1988-05-03 Combustion Engineering, Inc. Capacitive transducer with static compensation
US5187474A (en) * 1986-10-02 1993-02-16 Rosemount Inc. Digital converter apparatus for improving the output of a two-wire transmitter
US4748852A (en) * 1986-10-10 1988-06-07 Rosemount Inc. Transmitter with an improved span adjustment
US4866435A (en) * 1987-10-16 1989-09-12 Rosemount Inc. Digital transmitter with variable resolution as a function of speed
DE3932443C1 (da) * 1989-09-28 1990-12-20 Endress U. Hauser Gmbh U. Co, 7864 Maulburg, De
DE3933512A1 (de) * 1989-10-06 1991-04-18 Endress Hauser Gmbh Co Differenzdruckmessgeraet
US5224383A (en) * 1991-06-14 1993-07-06 Industrial Sensors, Inc. Melt pressure measurement and the like
MX9306152A (es) * 1992-10-05 1994-05-31 Fisher Controls Int Sistema de comunicacion y metodo.
WO1996017235A1 (en) * 1994-11-30 1996-06-06 Rosemount Inc. Pressure transmitter with fill fluid loss detection
JP3693665B2 (ja) * 2003-08-06 2005-09-07 東京エレクトロン株式会社 容量検出回路及び容量検出方法
DE102007026788A1 (de) * 2006-11-28 2008-05-29 Continental Teves Ag & Co. Ohg Aktiver Sensor, dessen Verwendung und Verfahren zur Kompensation von Amplitudenschwankungen der Ausgangsstromsignale eines aktiven Sensors
US20100313960A1 (en) * 2007-03-30 2010-12-16 Askew Andy R High Performance Transducer
US8519863B2 (en) 2010-10-15 2013-08-27 Rosemount Inc. Dynamic power control for a two wire process instrument
JP6958418B2 (ja) * 2018-02-21 2021-11-02 株式会社オートネットワーク技術研究所 給電制御装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3271669A (en) * 1962-12-04 1966-09-06 Rosemount Eng Co Ltd Alternating current diode loop capacitance measurement circuits
DE1229323B (de) * 1964-03-20 1966-11-24 J C Eckardt A G Vorrichtung zur Druckmessung
US3562729A (en) * 1967-09-08 1971-02-09 Honeywell Inc Two wire mv./v. transmitter
JPS4415398Y1 (da) * 1968-11-20 1969-07-03
US3691741A (en) * 1971-05-03 1972-09-19 Hesston Corp Machine for loading,stacking and unloading crops
JPS5538587B2 (da) * 1973-07-23 1980-10-04

Also Published As

Publication number Publication date
JPS6237440B1 (da) 1987-08-12
GB1335349A (en) 1973-10-24
JPS5514478B1 (da) 1980-04-16
IL35539A (en) 1974-06-30
JPS5514479B1 (da) 1980-04-16
DE2052520B2 (da) 1974-10-17
IL35539A0 (en) 1970-12-24
FR2066530A5 (da) 1971-08-06
US3646538A (en) 1972-02-29
DE2052520C3 (da) 1975-06-12
DE2052520A1 (de) 1971-04-29
JPS5031459B1 (da) 1975-10-11

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