ATE181611T1 - ANALOG TRANSDUCER WITH DIGITAL CONTROL - Google Patents

ANALOG TRANSDUCER WITH DIGITAL CONTROL

Info

Publication number
ATE181611T1
ATE181611T1 AT87905408T AT87905408T ATE181611T1 AT E181611 T1 ATE181611 T1 AT E181611T1 AT 87905408 T AT87905408 T AT 87905408T AT 87905408 T AT87905408 T AT 87905408T AT E181611 T1 ATE181611 T1 AT E181611T1
Authority
AT
Austria
Prior art keywords
analog
digital control
converter
signal processing
processing circuitry
Prior art date
Application number
AT87905408T
Other languages
German (de)
Inventor
Roger L Frick
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
Application filed by Rosemount Inc filed Critical Rosemount Inc
Application granted granted Critical
Publication of ATE181611T1 publication Critical patent/ATE181611T1/en

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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Transmitters (AREA)
  • Selective Calling Equipment (AREA)

Abstract

A two wire transmitter (10) controls loop current as a function of a sensed parameter such as pressure or temperature using analog sensing and signal processing circuitry. Corrections, such as for zero, span, and linearity are provided in the form of analog correction signals by a digital circuit which includes a nonvolatile memory (36), a microcomputer (32), and a digitial-to-analog (D/A) converter (26). The microprocessor (32) controls the D/A converter (26) as a function of stored digital correction values to produce the analog correction signals used by the analog signal processing circuitry to control the magnitude of the loop current flowing through the two wire transmitter (10).
AT87905408T 1986-08-22 1987-08-12 ANALOG TRANSDUCER WITH DIGITAL CONTROL ATE181611T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US89937886A 1986-08-22 1986-08-22

Publications (1)

Publication Number Publication Date
ATE181611T1 true ATE181611T1 (en) 1999-07-15

Family

ID=25410872

Family Applications (1)

Application Number Title Priority Date Filing Date
AT87905408T ATE181611T1 (en) 1986-08-22 1987-08-12 ANALOG TRANSDUCER WITH DIGITAL CONTROL

Country Status (5)

Country Link
EP (1) EP0328520B1 (en)
AT (1) ATE181611T1 (en)
CA (1) CA1300924C (en)
DE (1) DE3752283D1 (en)
WO (1) WO1988001417A1 (en)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4016922C3 (en) * 1990-05-25 1998-05-20 Schoppe & Faeser Gmbh Electrical transmitter using the two-wire method
GB2247318B (en) * 1990-08-20 1994-08-10 Rosemount Ltd A transmitter
WO1993007601A1 (en) * 1991-09-30 1993-04-15 Milltronics Ltd. Calibration system for measurement instruments
US5416723A (en) * 1993-03-03 1995-05-16 Milltronics Ltd. Loop powered process control transmitter
SG44494A1 (en) * 1993-09-07 1997-12-19 R0Semount Inc Multivariable transmitter
US5606513A (en) * 1993-09-20 1997-02-25 Rosemount Inc. Transmitter having input for receiving a process variable from a remote sensor
US5936514A (en) * 1996-09-27 1999-08-10 Rosemount Inc. Power supply input circuit for field instrument
DE19905071A1 (en) * 1999-02-08 2000-08-10 Siemens Ag Transmitter and method for diagnosing the supply of a transmitter
DE19930661A1 (en) * 1999-07-02 2001-01-18 Siemens Ag Transmitter
US6643610B1 (en) 1999-09-24 2003-11-04 Rosemount Inc. Process transmitter with orthogonal-polynomial fitting
DE19964002A1 (en) 1999-12-30 2001-07-12 Micronas Gmbh Sensor, has converter to generate electrical signal and signal processing unit to generate output signal with switch unit for offset compensation and devices for frequency-dependent mode switching
DE10037996C2 (en) * 2000-08-03 2003-04-17 Siemens Ag Electronic device, in particular field device
DE10102791B4 (en) 2001-01-22 2004-04-15 Ifm Electronic Gmbh Electrical transmitter
DE10202028A1 (en) * 2002-01-18 2003-07-24 Endress & Hauser Gmbh & Co Kg Transmitter for detecting a physical measured variable and for converting it into an electrical variable uses signal processors to reshape the electrical variable into a test signal
DE102005020870B4 (en) * 2005-02-10 2014-05-22 Continental Automotive Gmbh sensor circuit
DE102005020199B3 (en) * 2005-04-28 2006-09-21 Peter Wieninger Water level sensor system calibrating method, e.g. for industrial water tank, involves detecting signal line`s impedance, and temporarily changing impedance between display device`s calibration and normal modes, based on detected impedance
US7480487B2 (en) 2005-05-20 2009-01-20 Dresser, Inc. Power regulation for field instruments
US20060265105A1 (en) * 2005-05-20 2006-11-23 Hughes Albert R Loop-powered field instrument
US7461562B2 (en) 2006-08-29 2008-12-09 Rosemount Inc. Process device with density measurement
CN101517377B (en) 2006-09-29 2012-05-09 罗斯蒙德公司 Magnetic flowmeter with verification
FI121101B (en) * 2007-01-22 2010-06-30 Abb Oy Apparatus for producing an analog current or voltage signal
DE102007046560A1 (en) 2007-09-28 2009-04-02 Siemens Ag Field device with an analog output
EP2283324B1 (en) 2008-05-23 2021-05-12 Rosemount Inc. Multivariable process fluid flow device with energy flow calculation
DE102008050354A1 (en) * 2008-10-02 2010-04-08 Siemens Aktiengesellschaft transmitters
DE102008057474B4 (en) 2008-11-14 2012-08-02 Kg Transmitter Components Gmbh transmitters
US8340791B2 (en) 2009-10-01 2012-12-25 Rosemount Inc. Process device with sampling skew
US8334788B2 (en) 2010-03-04 2012-12-18 Rosemount Inc. Process variable transmitter with display
US9121743B2 (en) 2012-05-31 2015-09-01 Rosemount Inc. Process variable transmitter system with analog communication

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US604566A (en) * 1898-05-24 Machine for separating fine gold flakes from sand
US4001813A (en) * 1975-07-02 1977-01-04 The Bendix Corporation Precision capacitance to digital conversion system
US4494183A (en) * 1982-06-17 1985-01-15 Honeywell Inc. Process variable transmitter having a non-interacting operating range adjustment
US4567466A (en) * 1982-12-08 1986-01-28 Honeywell Inc. Sensor communication system
US4604566A (en) * 1985-08-07 1986-08-05 The Babcock & Wilcox Company Voltage pulse to current regulating convertor

Also Published As

Publication number Publication date
EP0328520B1 (en) 1999-06-23
EP0328520A1 (en) 1989-08-23
EP0328520A4 (en) 1989-10-04
CA1300924C (en) 1992-05-19
WO1988001417A1 (en) 1988-02-25
DE3752283D1 (en) 1999-07-29

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Legal Events

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