Importance

Loading Importance Indicators...

Abstract

The invention concerns an electronic circuit (10) for measuring a force, including a capacitive sensor (12) connected to a capacitive bridge (14), of the type wherein the capacitive sensor (12) includes a moving electrode (16) suspended elastically between a first (18) and a second (20) fixed electrode so as to form respectively a first (C1) and a second (C2) capacitor whose capacitance is variable, of the type wherein the capacitive bridge (14) generates an electric output signal (Vs), which is a function of the capacitance variations of the capacitors (C1, C2), of the type wherein the capacitance value of each capacitor (C1, C2) is substantially lower than one picofarad, when the moving electrode (16) occupies a rest position, and of the type wherein the excitation frequency of the circuit (10) is comprised overall within the low frequency range, characterised in that a series impedance element (26, 28, 30) is interposed between each of the three electrodes (16, 18, 20) and the capacitive bridge (14) so as to form a low-pass filter. The invention also proposes an accelerometer fitted with this circuit (10).

Loading the Abstract Image...

First Claim