CHARGE-TRANSFER-BASED SIGNAL INTERFACE FOR RESISTIVE SENSORS

• Abstract:

  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 kΩ and 1 MΩ, and ±5 % for sensors between 1 M? and 10 MΩ.
• Keywords:

  resistive sensor, charge transfer method, sensor-to-microcontroller interface, direct sensor interface
• Download:

  IMEKO-WC-2015-TC4-136.pdf
• DOI:

  _unreg_wc-2015.136

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