title: Note: Direct sensor resistance-to-frequency conversion with generalized impedance converter.
abstract: In this note a squared output signal is generated from an astable circuit. Its frequency has a linear dependence on the resistance value of a resistive temperature sensor. The main circuit to obtain this direct relationship is the generalized impedance converter configured as a capacitor controlled by a sensor resistance. The proposed measurement method allows a direct analog-to-digital interface of information involved in resistive sensors. The converter finds applications in portable low voltage and low power design of instrumentation electronic systems.
authors.affiliation: Department of Electronic Engineering, University of Valencia, C∕ Doctor Moliner, 50, 46100-Burjassot, Spain. diego.ramirez@uv.es
authors.forename: D
authors.initials: D
authors.lastname: Ramírez Muñoz
authors.forename: J
authors.initials: J
authors.lastname: Sánchez Moreno
authors.forename: S
authors.initials: S
authors.lastname: Casans Berga
authors.forename: A E
authors.initials: AE
authors.lastname: Navarro Antón