| 摘要 |
<p>A crystal oscillator of the present invention includes: a substrate (3) provided in a package; a heating device (4,81,82) arranged as surrounding an internal area of the substrate (3) on at least one of the surfaces of the substrate (3); a crystal resonator (51) or a crystal element and an oscillation circuit unit (52) provided in an area enclosed by the heating device (4,81,82); a thermosensitive element (53) which detects a temperature in an area enclosed by the heating device (4,81,82); and a control unit (55) for controlling a heating value applied to the heating device (4,81,82) based on a detection result of the thermosensitive element (53).</p> |
