Low-Cost Interfaces for Sensors and Sensor Systems

  • Frank M. L. van der Goes
  • Gerard C. M. Meijer


This paper discusses the basic ideas, circuitry and applications of a novel family of low-cost transducer interfaces. These interfaces, which are directly read-out by a microcontroller, service the following sensor elements: Pt resistors, thermistors, potentiometers resistors, capacitors, resistive bridges and voltage- and current sources. It is shown that, even when using lowcost CMOS technology, these interface and sensor systems can have a rather high accuracy. The interfaces have been designed for applications where the sensors signals have a low to moderate bandwidth. The main test results for some typical applications are reported in this paper. The accuracy amounts to 1 to 15 bits for a measurement time of 1 ms to 100ms. The number of external components has been kept to a minimum.


Measurement Phase Parasitic Capacitance Relaxation Oscillator Sensor Element Synchronous Detection 
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Copyright information

© Springer Science+Business Media Dordrecht 1997

Authors and Affiliations

  • Frank M. L. van der Goes
    • 1
  • Gerard C. M. Meijer
    • 1
  1. 1.Faculty of Electrical EngineeringDelft University of TechnologyDelftThe Netherlands

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