A novel smart resistive-capacitive position sensor

A novel smart resistive-capacitive angular position sensor is presented. The main advantages of this low-cost system are its simplicity, high stability and high reliability. A very linear oscillator is used in the processing circuit to convert the position quantity to a period-modulated signal which can be read out directly by a microcontroller. The system does not need an A/D converter. The nonlinearity of the smart angular position sensor system is less than /spl plusmn/0.3% (/spl plusmn/0.9/spl deg/) over the range of 270.<
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