Micro-machined accelerometer

A micromachined accelerometer in a flat plate comprising a base and at least two resonator measuring cells provided with a common mobile seismic element, the two measuring cells being placed one on each side of the common mobile seismic element along the sensitive axis of the accelerometer, such that under the effect of an acceleration, the resonator of one measuring cell undergoes a traction whilst the resonator of the other measuring cell undergoes a compression, said measuring cells respectively comprising means of amplification of the acceleration force generating the translation of the common mobile seismic element provided with a respective anchoring foot-piece, wherein said common mobile seismic element comprises at least two mobile seismic masses able to be displaced in translation along said sensitive axis and/or in rotation with respect to a respective axis of rotation substantially orthogonal to said sensitive axis under the effect of an acceleration along said sensitive axis, connected to each other by a mechanical connecting member able to prevent, at least partly, deformations of the amplification means resulting from deformations of the accelerometer generated by external thermal stresses.