Patent ID: 6670557
Filing Date: 2003-12-30
Classification: G01D,G01N,H05K

Abstract:
A design for constructing an input circuit to receive and process an electrical signal, such as a voltage signal from a voltage source, specifically from a sensor where the input circuit has an extremely high input resistance of at least 1011 ohms and is located on a printed circuit board, where a first area carrying input circuit components of the printed circuit board is separated by a channel-shaped recess from a surrounding second area, characterized in that the channel-shaped recess terminates in the interior of the printed circuit board and is extended in the direction of the thickness of the printed circuit board beyond a moisture-impervious barrier layer-which underlies the first area of the printed circuit board, and in that the channel-shaped recess and the first area are filled and enclosed by a cohesive moisture-impermeable sealing material.