A novel smart resistive-capacitive angular PSD

A novel smart resistive-capacitive angular PSD is presented. The main advantages of this low-cost system are its 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 directly be read out by a microcontroller. The system does not need an A/D converter. The nonlinearity of the smart PSD system is less than /spl plusmn/0.3% (/spl plusmn/0.9/spl deg/) over the range of 270/spl deg/.<>