Thermal impedance measurement of a self-heating probe

摘要

In case of large temperature dependencies of the properties, due to sufficient high voltages and currents the power dissipation in electric devices causes 'virtual' electrical impedances. The reason is the thermal impedance, which is determined by the inside structure and the environmental conditions. For many fields in solid-state circuit design and sensor applications, the actual value of the thermal impedance bears important information about the state of the device and its surroundings. In the paper it is shown, how the actual value of the thermal impedance can be determined directly from the continuously measured virtual electrical impedance.