title: Note: A non-invasive electronic measurement technique to measure the embedded four resistive elements in a Wheatstone bridge sensor.
abstract: The work shows a measurement technique to obtain the correct value of the four elements in a resistive Wheatstone bridge without the need to separate the physical connections existing between them. Two electronic solutions are presented, based on a source-and-measure unit and using discrete electronic components. The proposed technique brings the possibility to know the mismatching or the tolerance between the bridge resistive elements and then to pass or reject it in terms of its related common-mode rejection. Experimental results were taken in various Wheatstone resistive bridges (discrete and magnetoresistive integrated bridges) validating the proposed measurement technique specially when the bridge is micro-fabricated and there is no physical way to separate one resistive element from the others.
authors.affiliation: Department of Electronic Engineering, University of Valencia, Avda. de la Universitat, s/n, 46100-Burjassot, Spain.
authors.forename: S I
authors.initials: SI
authors.lastname: Ravelo Arias
authors.affiliation: Department of Electronic Engineering, University of Valencia, Avda. de la Universitat, s/n, 46100-Burjassot, Spain.
authors.forename: D
authors.initials: D
authors.lastname: Ramírez Muñoz
authors.affiliation: INESC Microsystems and Nanotechnologies (INESC-MN) and Institute for Nanosciences and Nanotechnologies, R. Alves Redol 9, Lisbon 1000-029, Portugal.
authors.forename: S
authors.initials: S
authors.lastname: Cardoso
authors.affiliation: INL-International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga, Braga 4715-31, Portugal.
authors.forename: R
authors.initials: R
authors.lastname: Ferreira
authors.affiliation: INESC Microsystems and Nanotechnologies (INESC-MN) and Institute for Nanosciences and Nanotechnologies, R. Alves Redol 9, Lisbon 1000-029, Portugal.
authors.forename: P
authors.initials: P
authors.lastname: Freitas