Patent ID: 8446226

Claim:
An oven controlled crystal oscillator, comprising a thermostatic bath, an inner circuit board, an outer circuit board, a heating element, and a temperature sensor; the inner circuit board being positioned inside the thermostatic bath and electrically connected with the outer circuit board via a pin, and the inner circuit board comprising a crystal oscillation circuit; the outer circuit board comprising a temperature control circuit and a power supply circuit electrically connecting with the temperature control circuit; the heating element and the temperature sensor electrically connecting with the outer circuit board; wherein a through slot is formed through the outer circuit board, and the thermostatic bath is inserted into the through slot; wherein the heating element is fixed on an outer surface of a side wall of the thermostatic bath, a recess is depressed inward and formed at a connection portion between a bottom and the side wall of the thermostatic bath, and the heating element is mounted in the recess.