Charge-transfer-based signal interface for resistive sensors

Charge transfer has been demonstrated to be a cost-effective method to measure capacitive sensors with low-end microcontrollers. Here we apply charge transfer to measure the output of voltage dividers that include a high value resistive sensor hence extending the advantages of this method to a large group of sensors. By using two-point calibration, the maximal deviation obtained, referred to the Full Scale Span (FSS), is ±4 % for sensors between 100 kO and 1 MO, and ±5 % for sensors between 1 MO and 10 MO