Patent ID: 8525607

Claim:
An oscillator comprising: an electronic circuit supported by a substrate and configured to initiate and sustain periodic oscillations; at least two crystal resonators each having a mounting surface that is substantially planar having an x, y and z coordinate system relative to the mounting surface with the x-y plane parallel to the mounting surface, the crystal resonators each having a total acceleration sensitivity vector equaling a vector sum of component acceleration sensitivity in each of the x, y and z axes of the crystal resonator, wherein the total acceleration sensitivity vector of each crystal resonator comprises a magnitude and direction that are substantially the same, the vector pointing in substantially the same direction relative to the mounting surface; a first crystal resonator and a second crystal resonator of the at least two crystal resonators, the first and second crystal resonators supported by the substrate and operatively coupled to the electronic circuit such that the mounting surfaces of the crystal resonators are parallel to each other, and the total acceleration sensitivity vector of each of the first and second crystal resonators are aligned within 5° of anti-parallel; and wherein said first and second crystal resonators function as a single composite resonator to assist in controlling the frequency of oscillation.