Radiometric thermometer

摘要

The thermometer has a variable gain and automatic gain control amplification unit (7) for amplifying a preamplified electrical signal (S3) from a preamplification unit (5). The unit (7) has an automatic gain control signal (Vcag) to allow automatic gain adjustment from an output signal (S7) of the unit (7). An electronic controlling and processing unit (8) i.e. microprocessor, automatically measures temperature of biological tissue of human body from the signal (Vcag). A low thermal inertia resistive load (30) i.e. resister, is associated to a current generator (31) controlled by the unit (8).