Abstract: An integrated circuit (IC) chip includes a first temperature sensor of a first type and a second temperature sensor of a second type that differs from the first type. A method implemented in the IC chip entails calibrating the second temperature sensor utilizing the first temperature sensor and following the calibrating operation, sensing a temperature of the IC chip utilizing the second temperature sensor. The first temperature sensor may be a bipolar junction transistor-based temperature sensor configured to undergo a voltage calibration. Alternatively, the first temperature sensor may be a thermal-diffusivity-based temperature sensor. The second temperature sensor may be a low power consumption sensor relative to the first temperature sensor, and the first temperature sensor may be powered off following calibration of the second temperature sensor.