An approach for practical use of common-mode noise reduction technique for in-vehicle electronic equipment

In this paper, we studied the use of common mode noise reduction technique for in-vehicle electronic equipment in an actual instrument design. We have improved the model circuit of the common mode noise that flows to the wire harness to add the effect of a by-pass capacitor located near an LSI. Moreover, to satisfy the noise reduction equation composed of numerous parameters, we proposed a design technique using an optimization algorithm and an electromagnetic field simulator, and confirmed its effectiveness.