| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve such a problem that although an input impedance (Z11) reduction method for suppressing power supply terminal noise or a transfer impedance (Z21) reduction method for suppressing noise propagation has been studied, the EMI countermeasure requires to suppress radiation noise of the whole system by cooperation design of the printed circuit board alone and the whole system (chip+package+board). <P>SOLUTION: In a printed circuit board mounting an LSI, radiation noise is suppressed by controlling the transfer impedance (Z21) from the LSI terminal to the end of the printed circuit board, and evaluating the whole system including the LSI. <P>COPYRIGHT: (C)2013,JPO&INPIT |
