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<DIV><FONT face=Arial size=2><SPAN class=296434719-02072007>Hi Jeroen,
All,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=296434719-02072007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=296434719-02072007>Reading the posts
and documents pointed to by different people on the reflector about switching
PSU's and the techniques used to reduce EMI, I found one method which seems
interesting to possibly use and to try out.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=296434719-02072007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=296434719-02072007>This is the method
whereby a number "phases" are created to try to reduce and "flatten" the
input current peaks and by doing so the chance of possible strong EMI
effects.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=296434719-02072007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=296434719-02072007>If the different
switching mode PSU's in the Demeter project can be synchronized externally,
this could be an option to try too.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=296434719-02072007>(E.g. spreading the
higher input currents of the +12 Volt and +5 Volt over
time)</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=296434719-02072007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=296434719-02072007>Also an
option of somewhat scaling the output current capacity of an SMPS by
selecting/populating more or fewer "phases"?</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=296434719-02072007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=296434719-02072007>Disadvantage could
be more (and higher in frequency) places where "spurs" could
occur.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=296434719-02072007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=296434719-02072007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=296434719-02072007>73's,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=296434719-02072007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=296434719-02072007>Henry.</SPAN></FONT></DIV></BODY></HTML>