Circuit arrangement for temperature measurement

摘要

The invention relates to a circuit arrangement for temperature measurement, in particular for measuring the body temperature of a patient. Use is made as measurement probe of a thermistor Rv which is connected to the primary side of a transformer T whose secondary winding is a part of an anti-resonant circuit (rejector) 2. The change in the attenuation of the anti-resonant circuit 2 as a function of the respective resistance value of the thermistor Rv is evaluated by means of a processor 1 in order to determine the temperature to be measured. Self-calibration is also possible using this circuit arrangement, as a result of which it is possible to obtain a high measurement accuracy even in the case of varying climatic conditions. <IMAGE>