Electromagnetic screening device for electronic circuit, uses metallic screening surface above and/or below electronic circuit coupled via capacitors to positive and negative supply terminals

摘要

The screening device uses a metallic screening surface (S,S'), provided by a layer of a multi-layer circuit board for the electronic circuit or by a separate circuit board, having an area at least equal to that of the electronic circuit (SNT). The screening surface is positioned above and/or below the electronic circuit and is coupled via respective capacitors (C2,C3) to the positive and negative terminals of the supply voltage for the electronic circuit.