> I looked briefly at LC filters to handle 120Hz ripple. Requires some > pretty large, expensive inductors if I'm not mistaken. Seems cheaper > in both board space and money to have more capacitance.
Are you trying to filter the 120Hz ripple, or just block the switcher ripple? Using a small inductor between the bulk caps (120Hz side) and a tantalum (switcher freq) "bypass" cap might help protect the bulk caps from too much high frequency ripple current. /me wonders if a diode in series with that inductor would help prevent resonance? _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
