| 摘要 |
PROBLEM TO BE SOLVED: To provide a temperature change measuring apparatus which can measure temperature changes with a higher accuracy without disturbing the temperature to be measured by eliminating the need for placing a reference clock oscillator into a thermostatic cell or allowing a room for making the frequency of a clock signal stable. SOLUTION: The first frequency division signal is generated by the first quartz oscillator with a larger temperature coefficient of an oscillation frequency and the oscillation circuit thereof and a dividing circuit and the second frequency division signal is generated by the second quartz oscillator with a smaller temperature coefficient of the oscillation frequency and the oscillation circuit thereof and a dividing circuit. The first and second quartz oscillators are arranged closer to each other and an output signal of a reference clock oscillator is counted using a cycle time difference signal between both the dividing cycles as a gate signal to determine changes in the temperature to be measured by computation from counts thereof obtained.
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