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RESEARCH PRODUCT
Note: Direct sensor resistance-to-frequency conversion with generalized impedance converter.
S. Casans BergaJ. Sánchez MorenoD. Ramírez MuñozA.e. Navarro Antónsubject
Resistive touchscreenMaterials sciencebusiness.industryInstrumentationElectrical engineeringSignalPower (physics)law.inventionMultivibratorCapacitorlawLow-power electronicsbusinessInstrumentationLow voltagedescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-12-01 | The Review of scientific instruments |