Patent ID: 7671710

Claim:
An oscillator comprising: an output resonator which vibrates mechanically; an output oscillator circuit oscillating at a resonance frequency of the output resonator to transmit an oscillation signal; and a capacitor which changes a capacitance thereof as a distance between an anode electrode and a cathode beam changes with environmental temperature, wherein the capacitor comprises: two support beams being disposed opposite with a gap to a support layer which is a semiconductor substrate; and two anchors for fixing one ends of the two support beams respectively onto the support layer such that two support beams extend in parallel in the same direction from the two anchors, wherein the other ends of the two support beams are connected orthogonally to ends of the cathode beam, respectively, and the anode electrode is fixed onto the support layer with the distance from the cathode beam wherein as the two support beams change their lengths with the environmental temperature, the distance between the anode electrode and the cathode beam changes to thereby change the capacitance.