CONNECTING SYSTEM BETWEEN CIRCUIT BOARD AND GROUND PLANE

摘要

PURPOSE:To enhance noise removing capacity of a filter. CONSTITUTION:A ground plane 5 is provided independently of the ground of a circuit board l mounting circuit elements 2 and a noise filter 3. Ground part 3a of the noise filter 3 is connected with the ground plane 5 and the ground part 2a of a circuit element 2 closest to the noise source side of the noise filter 3 is also connected with the ground plane 5. This constitution decreases ground impedance as compared with a conventional system, suppresses effect of signals from another circuit, and enhances noise removing capacity of a filter.