A method for controlling ground plane voltages by locally, at one or more discrete points on the working ground reference, sensing a voltage difference between a working ground reference and an isolated ground reference, generating a voltage compensation signal based on the voltage difference, and driving...http://www.google.fr/patents/US6555934?utm_source=gb-gplus-shareBrevet US6555934 - Method and apparatus for control of large-area ground plane potentials
Method and apparatus for control of large-area ground plane potentials
