Re: [SI-LIST] : EMC Issues with ASIC design

Lfresearch@aol.com
Wed, 3 Dec 1997 14:44:30 -0500 (EST)

Hi there,

been there, seen that, almost fixed it.....

In a small controller I found the CMOS ASIC to be responsible for outages
during Radiated emissions testing. Using ENSCAN, I found that all the
interface leads carried minute(?) levels of noise that when I hooked up
wiring radiated like crazy. Terminating the lines made little difference, but
I had great success putting RC filters close to where a lead left the PCB.

Anyone interested in a paper on this topic?

Best regards,

Derek N. Walton
Owner L F Research EMC Design and Test Facility