TY - JOUR
AU - George, Boby
AB - AbstractCapacitance-to-Digital Converter (CDC) ICs available in the market use square wave excitation signals but a sinusoidal excitation is preferred in various applications, such as ice detection, liquid level measurement, humidity measurement, proximity sensing, etc. A dual slope technique based CDC that employs a sinusoidal excitation has been reported recently, but it requires a large number of excitation cycles, to complete an accurate conversion. This paper presents an improved CDC that employs a specially designed method to achieve high accuracy even when a much smaller number of excitation cycles, than the reported scheme, are employed to complete the conversion. A prototype CDC has been developed and tested. In comparison with an existing CDC, the new CDC achieved a substantial reduction (by a factor of 4000) in the number of excitation cycles during integration period, resulting in an improved update rate. Worst case error observed from the prototype CDC was less than 0.24%.
TI - A Method for Improving Conversion Rate and Accuracy of a Capacitance-to-Digital Converter
JF - International Journal on Smart Sensing and Intelligent Systems
DO - 10.21307/ijssis-2019-088
DA - 2014-01-01
UR - https://www.deepdyve.com/lp/de-gruyter/a-method-for-improving-conversion-rate-and-accuracy-of-a-capacitance-cmmF2bbMCy
SP - 1
EP - 6
VL - 7
IS - 5
DP - DeepDyve
ER -