CA2068214A1 - Biosensor electrode excitation circuit - Google Patents

Biosensor electrode excitation circuit

Info

Publication number
CA2068214A1
CA2068214A1 CA2068214A CA2068214A CA2068214A1 CA 2068214 A1 CA2068214 A1 CA 2068214A1 CA 2068214 A CA2068214 A CA 2068214A CA 2068214 A CA2068214 A CA 2068214A CA 2068214 A1 CA2068214 A1 CA 2068214A1
Authority
CA
Canada
Prior art keywords
circuit
operational amplifier
potential
apart contacts
electrode
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
CA2068214A
Other languages
French (fr)
Other versions
CA2068214C (en
Inventor
Robert A. Parks
Bradley E. White
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.)
Roche Diagnostics Corp
Original Assignee
Individual
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=23790838&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2068214(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of CA2068214A1 publication Critical patent/CA2068214A1/en
Application granted granted Critical
Publication of CA2068214C publication Critical patent/CA2068214C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/28—Electrolytic cell components
    • G01N27/30—Electrodes, e.g. test electrodes; Half-cells
    • G01N27/327—Biochemical electrodes, e.g. electrical or mechanical details for in vitro measurements
    • G01N27/3271—Amperometric enzyme electrodes for analytes in body fluids, e.g. glucose in blood
    • G01N27/3273—Devices therefor, e.g. test element readers, circuitry

Abstract

A circuit is described for applying a potential to an electrode of a biosensing test cell, which electrode, when properly inserted in a female connector, is contacted by a pair spaced apart contacts. The circuit includes a source of excitation potential and an operational amplifier having one input connected to the source of excitation potential. A switching circuit is coupled between the operational amplifier and a first one of the spaced apart contacts, with the switch means exhibiting an impedance. A feedback circuit is connected between the second of the spaced-apart contacts and another input to the operational amplifier, to feed back a potential appearing at the second contact. The feedback is for the purpose of maintaining the output of the operational amplifier at a level which compensates for impedance losses in the swtiching circuit. The feedback circuit enables the output of the operational amplifier to be varied so that the potential applied to the electrode is equal to the source of excitation potential. A further circuit is connected to the feedback circuit for sensing when an open or high impedance state exists between the spaced-apart contacts.
CA002068214A 1989-12-15 1990-12-14 Biosensor electrode excitation circuit Expired - Lifetime CA2068214C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US451,108 1989-12-15
US07/451,108 US4999582A (en) 1989-12-15 1989-12-15 Biosensor electrode excitation circuit

Publications (2)

Publication Number Publication Date
CA2068214A1 true CA2068214A1 (en) 1991-06-16
CA2068214C CA2068214C (en) 1998-12-01

Family

ID=23790838

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002068214A Expired - Lifetime CA2068214C (en) 1989-12-15 1990-12-14 Biosensor electrode excitation circuit

Country Status (8)

Country Link
US (1) US4999582A (en)
EP (1) EP0505504B1 (en)
JP (1) JP2708276B2 (en)
AT (1) ATE149690T1 (en)
CA (1) CA2068214C (en)
DE (1) DE69030104T2 (en)
ES (1) ES2100944T3 (en)
WO (1) WO1991009316A1 (en)

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Also Published As

Publication number Publication date
DE69030104T2 (en) 1997-09-25
US4999582A (en) 1991-03-12
EP0505504A4 (en) 1993-08-04
DE69030104D1 (en) 1997-04-10
JP2708276B2 (en) 1998-02-04
WO1991009316A1 (en) 1991-06-27
EP0505504A1 (en) 1992-09-30
EP0505504B1 (en) 1997-03-05
CA2068214C (en) 1998-12-01
ATE149690T1 (en) 1997-03-15
JPH05503158A (en) 1993-05-27
ES2100944T3 (en) 1997-07-01

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