Potential sensor for measuring electrical potential in skin surface, has generator determining division factor of voltage divider by derived clock pulse and allocating displacing component of artifacts to zero with output signal

摘要

The sensor has a measuring electrode connected with an electrometer amplifier and an actuator. The actuator changes a distance between the electrode and a skin surface. The change is controlled by a generator (15). The generator determines a division factor of an input voltage divider by a derived clock pulse and allocates a displacing component of artifacts to zero with an output signal in an evaluation unit (16).