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A 1.2-V CMOS RC Oscillator for Capacitive and Resistive Sensor Applications

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2 Author(s)
Lasanen, K. ; Dept. of Electr. & Inf. Eng., Univ. of Oulu, Oulu ; Kostamovaara, J.

An accurate self-adjusting CMOS RC oscillator for capacitive and resistive sensor applications has been designed and manufactured. The oscillator operates with supply voltages from 1.2 to 3 V and achieves an internal accuracy of plusmn0.7% with a temperature range from -20degC to 60degC. The RC oscillator was fabricated in a 0.35-mum standard n-well CMOS process with threshold voltages of 0.5 and -0.65 V. Its design and operation are described, and results of measurements performed on the fabricated chips are presented.

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Instrumentation and Measurement, IEEE Transactions on  (Volume:57 ,  Issue: 12 )