WO1999060541A3 - Measurement circuit employing dual floating power supplies - Google Patents

Measurement circuit employing dual floating power supplies Download PDF

Info

Publication number
WO1999060541A3
WO1999060541A3 PCT/US1999/011154 US9911154W WO9960541A3 WO 1999060541 A3 WO1999060541 A3 WO 1999060541A3 US 9911154 W US9911154 W US 9911154W WO 9960541 A3 WO9960541 A3 WO 9960541A3
Authority
WO
WIPO (PCT)
Prior art keywords
power supply
converter
ended power
power supplies
voltage
Prior art date
Application number
PCT/US1999/011154
Other languages
French (fr)
Other versions
WO1999060541A2 (en
Inventor
Allan R Gunion
Original Assignee
Foxboro Co
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 Foxboro Co filed Critical Foxboro Co
Publication of WO1999060541A2 publication Critical patent/WO1999060541A2/en
Publication of WO1999060541A3 publication Critical patent/WO1999060541A3/en

Links

Classifications

    • 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
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/028—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure

Abstract

An electrical circuit for measuring an analog voltage from an external sensor comprises an a/d converter, first and second single-ended power supplies and a voltage reference. The a/d converter includes a differential input having a relatively high-voltage side and a relatively low-voltage side. The differential input is adapted for receiving a differential signal from an external sensor. The first single-ended power supply provides power and signal ground to the a/d converter. The second single-ended power supply is floating with respect to the first single-ended power supply and provides current to an external sensor, such as a loop powered transmitter. The voltage reference is powered from the first single-ended power supply and provides a common mode voltage bias to the differential input of the a/d converter.
PCT/US1999/011154 1998-05-20 1999-05-20 Measurement circuit employing dual floating power supplies WO1999060541A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8613098P 1998-05-20 1998-05-20
US60/086,130 1998-05-20

Publications (2)

Publication Number Publication Date
WO1999060541A2 WO1999060541A2 (en) 1999-11-25
WO1999060541A3 true WO1999060541A3 (en) 2000-06-02

Family

ID=22196470

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/US1999/010996 WO1999060340A2 (en) 1998-05-20 1999-05-19 Measurement circuit employing dual floating power supplies
PCT/US1999/011154 WO1999060541A2 (en) 1998-05-20 1999-05-20 Measurement circuit employing dual floating power supplies

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/US1999/010996 WO1999060340A2 (en) 1998-05-20 1999-05-19 Measurement circuit employing dual floating power supplies

Country Status (1)

Country Link
WO (2) WO1999060340A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10102791B4 (en) * 2001-01-22 2004-04-15 Ifm Electronic Gmbh Electrical transmitter
JP4534544B2 (en) * 2004-03-23 2010-09-01 横河電機株式会社 Transmitter system
US10908029B2 (en) * 2018-01-02 2021-02-02 Nxp B.V. Voltage and temperature monitoring in power supplies

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3602830A (en) * 1969-10-21 1971-08-31 Honeywell Inc A constant current control circuit
US5677476A (en) * 1996-02-06 1997-10-14 Endress + Hauser Conducta Gesellschaft Fuer Mess- Und Regeltechnik Mbh & Co. Sensor and transmitter with multiple outputs

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3602830A (en) * 1969-10-21 1971-08-31 Honeywell Inc A constant current control circuit
US5677476A (en) * 1996-02-06 1997-10-14 Endress + Hauser Conducta Gesellschaft Fuer Mess- Und Regeltechnik Mbh & Co. Sensor and transmitter with multiple outputs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BIJL W VAN DER: "THE DIGITISATION OF FIELD INSTRUMENTS", JOURNAL A,BE,SOFT VISION, BRUSSELS, vol. 32, no. 3, October 1991 (1991-10-01), pages 62-65, XP000266215, ISSN: 0771-1107 *

Also Published As

Publication number Publication date
WO1999060541A2 (en) 1999-11-25
WO1999060340A2 (en) 1999-11-25

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