Method of thermometry and apparatus for the thermometry

摘要

A detector unit of a thermometer of this invention is comprised of a pair of oscillators which are closely installed each other. We make a latch signal of a counter circuit for specially made crystal resonator whose number of proper vibration changes with temperature, and latch a counter value of a counter circuit for reference crystal resonator by said latch signal. We calculate the temperature by a microcomputer using the latched value from the said reference crystal resonator. The power consumption of an electric circuit of the detector unit is less than 0.6 mW under the condition of the supply voltage at DC 2.5V.