Patent ID: 7071598

Claim:
A thin and highly stable piezoelectric oscillator comprising: a piezoelectric vibrator provided with a piezoelectric vibrator main body where a piezoelectric vibrating element is sealed in a metal case in an air-tight manner and lead terminals projecting from a bottom portion of the piezoelectric vibrator main body; a mother printed board which supports the piezoelectric vibrator main body on one face and connects the lead terminals to a wiring pattern; an oscillating circuit part which is mounted on one face of the mother printed board to be arranged so as to closely contact with the one face of the piezoelectric vibrator main body; an adjusting circuit part which is mounted on the other face of the mother printed board; an internal printed board which is provided in contact with the other face of the piezoelectric vibrator main body; and a heater resistor which is mounted on the internal printed board to be arranged so as to closely contact with the other face of the piezoelectric vibrator main body.