JPS5787610A - Analog gain control system - Google Patents

Analog gain control system

Info

Publication number
JPS5787610A
JPS5787610A JP16333480A JP16333480A JPS5787610A JP S5787610 A JPS5787610 A JP S5787610A JP 16333480 A JP16333480 A JP 16333480A JP 16333480 A JP16333480 A JP 16333480A JP S5787610 A JPS5787610 A JP S5787610A
Authority
JP
Japan
Prior art keywords
amplifier
gain
digital signal
switch
basing
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.)
Pending
Application number
JP16333480A
Other languages
Japanese (ja)
Inventor
Nobuhiko Tsuji
Keijiro Nakamura
Koichi Endo
Toshiyoshi Hamada
Keiichi Ishida
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
Fuji Electric Manufacturing Co Ltd
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 Fuji Electric Co Ltd, Fuji Electric Manufacturing Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP16333480A priority Critical patent/JPS5787610A/en
Priority to US06/318,000 priority patent/US4420564A/en
Publication of JPS5787610A publication Critical patent/JPS5787610A/en
Pending 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
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
    • C12Q1/001—Enzyme electrodes
    • C12Q1/005—Enzyme electrodes involving specific analytes or enzymes
    • C12Q1/006—Enzyme electrodes involving specific analytes or enzymes for glucose

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Molecular Biology (AREA)
  • Wood Science & Technology (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Zoology (AREA)
  • Immunology (AREA)
  • Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • Biophysics (AREA)
  • Emergency Medicine (AREA)
  • Pathology (AREA)
  • Biotechnology (AREA)
  • Microbiology (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Hematology (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • General Engineering & Computer Science (AREA)
  • Genetics & Genomics (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To make gain adjustment of an amplifier automatically, by converting an analog signal from an amplifier into a digital signal, deciding the input level basing on this digital signal and controlling the gain of the amplifier. CONSTITUTION:A reaction current detected by a solid-state enzyme film sensor 1 is inputted to an amplifier 12, amplified with a constant determined by a switch selected in a gain switch group 13 and converted into a digital signal at an A/D converter 15. This digital signal is given to a control circuit 16 to decide if the input level of the A/D converter 15 is within a good range, and if the level is lower or higher than the specified range, a gate selection code is outputted basing on the control signal from the control circuit 16. A specified switch is selected from the gain switch group by this gate selection code and the gain of the amplifier 12 is controlled.
JP16333480A 1980-11-21 1980-11-21 Analog gain control system Pending JPS5787610A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP16333480A JPS5787610A (en) 1980-11-21 1980-11-21 Analog gain control system
US06/318,000 US4420564A (en) 1980-11-21 1981-11-04 Blood sugar analyzer having fixed enzyme membrane sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16333480A JPS5787610A (en) 1980-11-21 1980-11-21 Analog gain control system

Publications (1)

Publication Number Publication Date
JPS5787610A true JPS5787610A (en) 1982-06-01

Family

ID=15771878

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16333480A Pending JPS5787610A (en) 1980-11-21 1980-11-21 Analog gain control system

Country Status (1)

Country Link
JP (1) JPS5787610A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009125412A2 (en) * 2008-04-08 2009-10-15 E.N.G.S. Systems Ltd. System for measuring milk flow at a milking installation
WO2010037586A1 (en) * 2008-09-30 2010-04-08 Endress+Hauser Gmbh+Co.Kg Method for producing a capacitive measuring device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009125412A2 (en) * 2008-04-08 2009-10-15 E.N.G.S. Systems Ltd. System for measuring milk flow at a milking installation
WO2009125412A3 (en) * 2008-04-08 2009-12-03 E.N.G.S. Systems Ltd. System for measuring milk flow at a milking installation
WO2010037586A1 (en) * 2008-09-30 2010-04-08 Endress+Hauser Gmbh+Co.Kg Method for producing a capacitive measuring device
US8434211B2 (en) 2008-09-30 2013-05-07 Endress + Hauser Gmbh + Co. Kg Method for manufacturing a capacitive measuring apparatus

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