Show simple item record

dc.contributor.authorTorrents Dolz, Josep M.
dc.contributor.authorPallàs Areny, Ramon
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica
dc.identifier.citationTorrents, JM; Pallàs, R. Compensation of impedance meters when using an external front-end amplifier. IEEE Transactions on Instrumentation and Measurement. 2002, vol.51 núm.2, p.310-313
dc.description.abstractFour-terminal impedance meters based on pseudo-bridges yield unexpected uncertainties when using high-contact-impedance electrodes. Adding a front-end amplifier to the impedance meter and rearranging the connection of the meter terminals overcome the contact impedance problem. However, because the compensation provisions in the instrument are meant to compensate only impedance residuals of test fixtures, by either an open/short or an open/short/load correction procedure, the external front-end increases the inaccuracy of the measurement setup. This paper shows that an open/short/load correction can also compensate complicated impedance residuals such as those from external amplifiers. The paper details the correction procedure and provides the equations to calculate the impedance under test from the readings of the impedance meter.
dc.subjectÀrees temàtiques de la UPC::Enginyeria biomèdica::Electrònica biomèdica
dc.subject.lcshImpedance (Electricity)
dc.subject.lcshAmplifiers (Electronics)
dc.subject.otherBridge instruments
dc.subject.otherElectric impedance measurement
dc.subject.otherImpedance meter
dc.subject.otherExternal front-end amplifier
dc.subject.otherElectrode contact impedance
dc.subject.otherResidual impedance
dc.subject.otherOpen/short/load/ correction
dc.subject.otherPseudo-bridge instrument
dc.titleCompensation of impedance meters when using an external front-end amplifier
dc.subject.lemacImpedància (Electricitat)
dc.subject.lemacAmplificadors (Electrònica)
dc.contributor.groupUniversitat Politècnica de Catalunya. IEB - Instrumentació Electrònica i Biomèdica
dc.contributor.groupUniversitat Politècnica de Catalunya. GRUP ISI - Grup d'Instrumentació, Sensors i Interfícies
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.relation.projectidcttCICYT TAP1999-0742

Files in this item


This item appears in the following Collection(s)

Show simple item record

All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder