A Circuit Interface for Resistive Sensors

The ever-increasing application of sensor networks in many different fields is causing a growing demand of low-cost passive sensors for monitoring physical variables such as temperature, pressure or ambient humidity. These sensors need a conditioning circuit that allows an easy interface to a microc...

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Bibliographic Details
Main Authors: Revuelto, J., Calvo, B., Medrano, N., Celma, S., Zatorre, G.
Format: Conference Proceeding
Language:English
Subjects:
Biosensors
Chemical and biological sensors
Circuits
Electric resistance
Intelligent sensors
Microcontrollers
Sensor phenomena and characterization
Temperature sensors
Voltage
Wireless sensor networks
Online Access:Request full text
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Description
Summary:The ever-increasing application of sensor networks in many different fields is causing a growing demand of low-cost passive sensors for monitoring physical variables such as temperature, pressure or ambient humidity. These sensors need a conditioning circuit that allows an easy interface to a microcontroller, taking advantage of the full range of the sensor and reducing the microcontroller requirements. This paper presents a conditioning electronics designed to transform the output of low-cost resistive sensors to a frequency variable signal. The circuit is designed to use the full frequency range available, providing a good resolution while the resulting quasi-digital signals are compatible to the logic levels of a standard low-power microcontroller.
ISSN:2163-4971
2643-1300
DOI:10.1109/SCED.2009.4800495