Automatic test of an electronic circuit for a capacitive sensor, and electronic circuit for carrying out said test

摘要

The method involves dividing measuring cycles into two successive phases (P1, P2) in a normal operating mode. Capacitors (C1, C2) are discharged by an output voltage provided by an integrator unit (5) in the phase (P1). Electrodes of the capacitors of differential mounted capacitors are polarized by high or low voltage of a voltage source in another phase. A polarizing voltage is obtained on a basis of a constant reference voltage that is programmed as a function of a desired electrostatic force to be generated for an automatic test of an electronic circuit (1). An independent claim is also included for an electronic circuit with a capacitive sensor suited for implementing an automatic test method.