Internal sensor with disturbing current reduced by compensation branches
AssigneeSagem Defense Securite
InventorsRaphaël Brisson, Paul Featonby
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Abstract
The inertial sensor comprises a piezoelectric plate having a vibrator member defined therein carrying excitation electrodes connected to an excitation circuit including conductor tracks carried by the piezoelectric plate the excitation circuit including a disturbing circuit portion in which the excitation circuit has compensation branches associated with corresponding disturbing conductor track portions, each compensation branch having one end connected to the corresponding disturbing conductor track portion and extending on a side of the midplane that is opposite from the side on which the corresponding disturbing conductor track portion extends.
Claims7
An inertial sensor comprising a piezoelectric plate having defined therein a vibrator member carrying excitation electrodes connected to an excitation circuit comprising conductor tracks carried by the piezoelectric plate, the excitation circuit including a disturbing circuit portion in which two of the conductor tracks of the excitation circuit extend side by side and on either side of a midplane of a portion of the plate that is subjected to deformation when the sensor is subjected to acceleration, wherein, in the disturbing circuit portion, compensation branches are associated with corresponding disturbing conductor track portions, and wherein each compensation branch has one end connected to a corresponding disturbing conductor track portion and lies on a side of the midplane that is opposite from the side on which the disturbing conductor track portion lies.
Dependencies are inferred from the claim text.