| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-sized temperature compensated oscillator which brings into play the the features of a discrete type oscillator and is superior in workability. SOLUTION: The integrated temperature-compensated circuit board which is in the shape of a flat plat compensates the frequency-temperature characteristics of a crystal oscillator, has an input electrode connected with a mounted electrode of a crystal vibrator, and is composed of a laminated circuit board which has a concave section formed on the other main surface, enabling an IC which constitutes the oscillation circuit to be stored in the concave. The laminated circuit board is formed to built-in a temperature compensated device that holds at least a thermistor, of which the value of resistance changes, in response to temperature variation. The thermistor is formed on the main surface of the laminated circuit board by printing. The thermistor is formed by printing on the laminating surface of the laminated circuit board by printing or is embedded inside the board as a chip device. Adjustment resistor, which adjust the value of the resistance of the thermistor at normal temperature, is provided on the main surface of the laminated circuit board. By joining these integrated temperature compensated circuit boards with the back plane of the crystal vibrator, the temperature-compensated oscillator is constituted.
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