6533b823fe1ef96bd127e97a
RESEARCH PRODUCT
A new gas sensor electronic interface with generalized impedance converter
Edith Navarro AntónSilvia Casans BergaDiego Ramírez MuñozAlejandro Durán Carrillo De AlbornozJaime Sánchez Morenosubject
Materials sciencebusiness.industryMetals and AlloysElectrical engineeringInput impedanceCondensed Matter PhysicsSurfaces Coatings and FilmsElectronic Optical and Magnetic Materialslaw.inventionMultivibratorCapacitorMicrocontrollerPSoCTerminal (electronics)lawMaterials ChemistryVariable capacitorSystem on a chipElectrical and Electronic EngineeringbusinessInstrumentationdescription
A new gas sensor conditioning circuit that allows a direct resistance-to-frequency conversion, as well as the procedure for the design, is presented. The generalized impedance converter (GIC) proposed is configured as a variable capacitor connected with the capacitor timing terminal of an astable multivibrator implemented by a PSoC (programmable system on chip) microcontroller device. The GIC effective input impedance, which is controlled by the gas sensor resistance, controls the astable output frequency. Good correlation of the experimental output frequency, which depends on the gas concentration, is achieved. The circuit is a simple gas sensor digital interface with frequency output.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-09-01 | Sensors and Actuators B: Chemical |