Marechiare wrote: > Some people would say that's real sloppy. A precision analog circuit > would like its ground to be protected from glitches caused by other > parts. If you have a "precision analog circuit", then you most likely shouldn't be making assumptions about the cleanliness of the board's main supply, and therefore filter it properly local to the analog circuit. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .