ES2165809B1 - MEASUREMENT SYSTEM BASED ON ISFETS / MEMFETS SENSORS THAT ALLOWS TO VARY THE SENSOR OPERATION POINT AND DETERMINE THE CONCENTRATION OF IONS IN A LIQUID MEDIUM. - Google Patents

MEASUREMENT SYSTEM BASED ON ISFETS / MEMFETS SENSORS THAT ALLOWS TO VARY THE SENSOR OPERATION POINT AND DETERMINE THE CONCENTRATION OF IONS IN A LIQUID MEDIUM.

Info

Publication number
ES2165809B1
ES2165809B1 ES200001621A ES200001621A ES2165809B1 ES 2165809 B1 ES2165809 B1 ES 2165809B1 ES 200001621 A ES200001621 A ES 200001621A ES 200001621 A ES200001621 A ES 200001621A ES 2165809 B1 ES2165809 B1 ES 2165809B1
Authority
ES
Spain
Prior art keywords
liquid medium
sensor
memfets
isfets
sensors
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 - Fee Related
Application number
ES200001621A
Other languages
Spanish (es)
Other versions
ES2165809A1 (en
Inventor
Berga Silvia Casans
Munoz Diego Ramirez
Anton Asuncion Edith Navarro
Sebastia Jose Pelegri
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.)
Universitat de Valencia
Original Assignee
Universitat de Valencia
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 Universitat de Valencia filed Critical Universitat de Valencia
Priority to ES200001621A priority Critical patent/ES2165809B1/en
Publication of ES2165809A1 publication Critical patent/ES2165809A1/en
Application granted granted Critical
Publication of ES2165809B1 publication Critical patent/ES2165809B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

Sistema de medida basado en sensores ISFETs/MEMFETs que permite variar el punto de operación del sensor y determinar la concentración de iones en un medio líquido. El circuito que se presenta está formado por dos fuentes de corriente, dos resistencias, dos amplificadores operacionales, una unidad de alimentación y medida, un amperímetro electrométrico, un electrodo de referencia y por último un sensor químico (ISFET/MEMFET), estos últimos sumergidos en el medio líquido que se quiere analizar. El circuito puede ser utilizado como circuito de medida, para conocer la actividad del ión H{sup,+} en el medio líquido u otro ión en el caso de utilizar como sensor químico un MEMFET, manteniendo un punto de operación fijo o bien como circuito de caracterización en el cual puede controlarse el punto de operación, es decir la corriente del sensor y la tensión de polarización, y centrar el estudio en el propio sensor.Measuring system based on ISFETs / MEMFETs sensors that allows varying the sensor's operating point and determining the ion concentration in a liquid medium. The circuit presented is formed by two current sources, two resistors, two operational amplifiers, a power and measurement unit, an electrometric ammeter, a reference electrode and finally a chemical sensor (ISFET / MEMFET), the latter submerged in the liquid medium that you want to analyze. The circuit can be used as a measuring circuit, to know the activity of the H {sup, +} ion in the liquid medium or another ion in the case of using a MEMFET as a chemical sensor, maintaining a fixed operating point or as a circuit characterization in which the operating point can be controlled, ie the sensor current and the polarization voltage, and center the study on the sensor itself.

ES200001621A 2000-06-21 2000-06-21 MEASUREMENT SYSTEM BASED ON ISFETS / MEMFETS SENSORS THAT ALLOWS TO VARY THE SENSOR OPERATION POINT AND DETERMINE THE CONCENTRATION OF IONS IN A LIQUID MEDIUM. Expired - Fee Related ES2165809B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES200001621A ES2165809B1 (en) 2000-06-21 2000-06-21 MEASUREMENT SYSTEM BASED ON ISFETS / MEMFETS SENSORS THAT ALLOWS TO VARY THE SENSOR OPERATION POINT AND DETERMINE THE CONCENTRATION OF IONS IN A LIQUID MEDIUM.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200001621A ES2165809B1 (en) 2000-06-21 2000-06-21 MEASUREMENT SYSTEM BASED ON ISFETS / MEMFETS SENSORS THAT ALLOWS TO VARY THE SENSOR OPERATION POINT AND DETERMINE THE CONCENTRATION OF IONS IN A LIQUID MEDIUM.

Publications (2)

Publication Number Publication Date
ES2165809A1 ES2165809A1 (en) 2002-03-16
ES2165809B1 true ES2165809B1 (en) 2003-02-16

Family

ID=8494072

Family Applications (1)

Application Number Title Priority Date Filing Date
ES200001621A Expired - Fee Related ES2165809B1 (en) 2000-06-21 2000-06-21 MEASUREMENT SYSTEM BASED ON ISFETS / MEMFETS SENSORS THAT ALLOWS TO VARY THE SENSOR OPERATION POINT AND DETERMINE THE CONCENTRATION OF IONS IN A LIQUID MEDIUM.

Country Status (1)

Country Link
ES (1) ES2165809B1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8428138D0 (en) * 1984-11-07 1984-12-12 Sibbald A Semiconductor devices
EP0315790B1 (en) * 1987-10-13 1992-04-15 Taiyo Yuden Co., Ltd. Chemical sensors and their divided parts
KR930002824B1 (en) * 1990-08-21 1993-04-10 손병기 Biosensor using ion sensitive field effect transistor
US5911873A (en) * 1997-05-02 1999-06-15 Rosemount Analytical Inc. Apparatus and method for operating an ISFET at multiple drain currents and gate-source voltages allowing for diagnostics and control of isopotential points
GB9726348D0 (en) * 1997-12-13 1998-02-11 Eastman Kodak Co Ion concentration and pH measurement
DE19857953C2 (en) * 1998-12-16 2001-02-15 Conducta Endress & Hauser Device for measuring the concentration of ions in a measuring liquid

Also Published As

Publication number Publication date
ES2165809A1 (en) 2002-03-16

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