Patent ID: 6726361
Filing Date: 2004-04-27
Classification: G01K

Abstract:
An arrangement for measuring the temperature of an electronic circuit, the arrangement comprisinga measuring element being in close thermal communication with the electronic circuit, which measuring element comprises a temperature-dependent component in each of a plurality of current paths and whose current-voltage characteristic is dependent on the temperature in accordance with a different predetermined function in the plurality of current paths, which temperature-dependent components can each be impressed with a predetermined current for generating a voltage dependent on the temperature at each one of the temperature-dependent components, and an evaluation circuit for forming an output voltage representing a measure of the temperature of the electronic circuit from the difference of the voltages at the temperature-dependent components, the evaluation circuit comprising an inverter stage for inverting one of the temperature-dependent voltages at one of the temperature-dependent components, a voltage combination stage for forming a voltage value which corresponds to the arithmetic mean value of one of the temperature-dependent voltages at one of the temperature-dependent components and the inverted temperature-dependent voltages, and an output amplifier stage for amplifying and supplying the voltage value formed by the voltage combination stage as an output voltage representing a measure of the temperature of the electronic circuit.