[sdiy] switcher + linear = trouble!

[Ian Fritz]

Paul --

Nice article -- thanks for bringing it up.  The discussion about inductors 
(rf chokes) being liable to pick up radiation is interesting ... who would 
have thought of that?  I've used beads in VCOs to isolate the power supply 
runs for the expo converter section from the switching section(s).  They 
definitely cut down the spikes in the expo section, although these may not 
be a big problem in practice.

   Ian


At 07:21 AM 3/28/06, Paul Perry wrote:
>Here's the Word, from a master:
>why just bunging a linear reg after a switcher may notget the spikes out.
>Ok, I'm reading this five years too late for one hair-pulling episode...
>but at least now I know!
>We'll see more of this shit when switchers take over.
>
>http://www.edn.com/article/CA6288040.html
>
>paul perry melbourne australia