Patent ID: 8373513

Claim:
A resonator comprising: an oscillating element, first and second excitation electrodes of the oscillating element each having a main surface at least partially facing the oscillating element, means for applying a signal having an AC component on each excitation electrode to make the oscillating element oscillate by means of the excitation electrodes so that as the oscillating element moves towards one of the excitation electrodes, it moves away from the other excitation electrode, wherein the AC components are in antiphase between the first and second excitation electrodes, an additional electrode electrically connected to the oscillating element at a point such that the capacitive influences of the excitation electrodes neutralize one another, means for applying a DC voltage difference between the oscillating element and excitation electrodes, a signal representative of oscillation of the oscillating element provided via the additional electrode, a bias electrode connected to a first DC voltage source.