Electronic circuit comprising a low noise capacitive sensor and accelerometer being equiped with such a circuit

摘要

The circuit has a capacitive sensor (12) electrically connected to a charge-compensating capacitive bridge (14) and comprising a mobile electrode (16) elastically suspended between two fixed electrodes (18, 20) to form variable capacitors (C1, C2). Resistors (26, 28, 30) are interposed between each of the electrodes and the bridge to form a low-pass filter, where each resistor has a value of 270 kilo ohms. An independent claim is also included for an accelerometer comprising an electronic force measuring circuit.