PURPOSE: To attain temperature compensation with low power consumption and high accuracy by providing a frequency division circuit frequency-dividing an oscillated output signal, a compensation means controlling the oscillated frequency of an oscillation means by the output of a temperature measurement means and a power supply means supplying a constant voltage to the oscillation means.

CONSTITUTION: The output signal of an oscillating circuit 101 is frequency- divided into a desired frequency by a frequency divider circuit A102 and a frequency divider circuit B103. The temperature measuring means 109 generates an analog signal in response to an ambient temperature θ and the temperature information is fed to a correction deciding means 107 and a power supply control circuit 104 through an A/D conversion 108. The correction means A105, B106 are controlled by the output of the means 107 to control the oscillated frequency of the oscillating circuit 101 and the frequency division ratio of the frequency divider circuits A102, B103 to apply temperature correction. Moreover, the control circuit 104 controls the power supply of the oscillation circuit 101 and the frequency divider circuit A102 according to the said temperature information to improve the low current consumption and stable oscillation.