Dear fellow designers, I am working now on a design with a mixed signal ,i.e. analog and digital. What I understand is that ,from the EMC point of view ,you have to separate between the two grounds, the analog ground and the digital ground. My question is how are you going to connect them at the end, directly (short circuit) or through a component (e.g. ferrite bead). One of the reasons I want to do that, is to know if I have to separate the two grounds right from the beginning,i.e. on the schematic, or shall I leave it till the layout and then keep it in mind to connect them directly. And what is the preferable grounding scheme for that type of designs. Any help is appreciated. -- Best Regards Khaled H. Fouad PCB Designer / R&D Department Tel.: +20 (11) 333414 Ext. : 312 Fax. : +20 (11) 335613 BAHGAT Group http://www.bahgat.com Email : [log in to unmask] Second Industrial Zone, Plot 240, 6 October City, Egypt