Patent ID: 10326427

Abstract:
A resonator includes: a resonator element that includes a base portion and a resonating arm; and a base. When n is one natural number of 2 or greater and j is 1 or greater and a natural number which is less than or equal to n, the resonator element performs resonations with n inherent resonation modes. In a relationship between arbitrary integers kj and resonance frequencies fj corresponding to the n inherent resonation modes, respectively, when f1 represents the resonance frequency of the main resonation of the resonator element and a normalized frequency difference Δf is defined by a relationship of |Δf|≥0.03 is satisfied. The arbitrary integers kj satisfy relationships of 3≤Σj=1n|kj|≤10 and n≤Σj=1n|kj|. A ratio of an amount of a change in the resonance frequency of the main resonation, to excitation power that electrically excites the main resonation, is 20 [ppm/μW] or higher.