Temperature control unit of the crystal oscillator with a constant temperature bath , wireless transmission apparatus , radio receiving apparatus , radio transmitting and receiving apparatus and radio base station

摘要

Temperature detection for detecting heater temperature chamber having therein (30) and (20), heating thermostat (20) inside (40), the temperature thermostatic chamber (20) internal crystal oscillator outputting an oscillation signal In response to the oscillating signal crystal oscillator (30) and the detection result of the switching element that part (50), on-off control of the heater (40) and (60), the temperature detection unit (50), and synchronizing the oscillation signal with, and a temperature control unit for on / off control (60) and the switching element (70).