Circuitry and techniques for resistor-based temperature sensing

A temperature sensor comprising:

• a microelectromechanical system (MEMS) thermistor having a resistance that correlates to its temperature;
• a switched capacitor network having one or more capacitors and circuitry to switchably enable current flow into and out of the one or more capacitors in response to a switching signal such that the switched capacitor network exhibits an effective resistance dependent upon the switching frequency of the switching signal;
• a signal generator, coupled to the switched capacitor network, to generate the switching signal with variable and controllable switching frequency;
• comparator circuitry, coupled to the switched capacitor network and the MEMS thermistor, to generate error data using (i) the effective resistance of the switched capacitor network and (ii) the resistance of the MEMS thermistor;
• and
• converter circuitry, coupled to the signal generator and the comparator circuitry, to generate output data which is representative of the temperature of the MEMS thermistor using the error data.