Leakage Magnetic Field Source Searching of Micro Processing Unit on Printed Circuit Board

摘要

In the present paper, we have proposed an approach of the leakage magnetic field source searching of a micro processing unit (MPU) on a practical printed circuit board (PCB) from a locally magnetic field distribution. At first, the Fourier multi-resolution analysis was applied to locally measured magnetic field distributions. Secondly, we have calculated a current distribution by using a new approach based on the minimum norm method.