Quartz resonator resonating in a fundamental torsional mode.
The invention relates to a quartz resonator having good thermal properties, produced in a thin plate and able to be readily mounted in a leaktight casing. <??>The resonator is obtained through a first rotation of angle THETA about the mechanical or electrical axis of the quartz crystal, then through a second rotation of angle PSI about the normal to the plane of the resonator. The angles THETA and PSI are defined such that the first order thermal coefficient is zero and the second order thermal coefficient has a zero or very small value. The shape of the resonator may be rectangular, square, polygonal, circular or elliptic. The resonator is fixed to a fixing base by at least one pair of connection arms arranged in the extension of a nodal line. <??>The resonator of the invention finds its application in the field of miniature flush-mountable resonators of relatively low frequency. <IMAGE>