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<DIV><SPAN class=327212723-10082010><FONT color=#0000ff size=2 face=Arial>SFDR
of the ADC itself is only in the -100 dBc range. If properly designed
there is no reason why an SMPS can't be used in this sort of
application.</FONT></SPAN></DIV>
<DIV><SPAN class=327212723-10082010><FONT color=#0000ff size=2
face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=327212723-10082010><FONT color=#0000ff size=2 face=Arial>--
john, KE5FX</FONT></SPAN></DIV>
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style="BORDER-LEFT: #0000ff 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px">
<DIV dir=ltr class=OutlookMessageHeader align=left><FONT size=2
face=Tahoma>-----Original Message-----<BR><B>From:</B>
hpsdr-bounces@lists.openhpsdr.org
[mailto:hpsdr-bounces@lists.openhpsdr.org]<B>On Behalf Of </B>Mack
Rogers<BR><B>Sent:</B> Tuesday, August 10, 2010 2:39 PM<BR><B>To:</B>
hpsdr@lists.openhpsdr.org; FRANCIS CARCIA<BR><B>Subject:</B> Re: [hpsdr] SMPS
the wrong way to go<BR><BR></FONT></DIV>
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<DIV>I'm no solid state design guru BUT that seems a very valid
point.</DIV>
<DIV> </DIV>
<DIV>Mack Rogers</DIV>
<DIV>N4VGB</DIV>
<DIV> </DIV>
<DIV><BR><BR>--- On <B>Tue, 8/10/10, FRANCIS CARCIA
<I><carcia@sbcglobal..net></I></B> wrote:<BR></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><BR>From:
FRANCIS CARCIA <carcia@sbcglobal.net><BR>Subject: [hpsdr] SMPS
the wrong way to go<BR>To: hpsdr@lists.openhpsdr.org<BR>Date: Tuesday,
August 10, 2010, 4:14 PM<BR><BR>
<DIV class=plainMail>***** High Performance Software Defined Radio
Discussion List *****<BR><BR></DIV>
<DIV id=yiv327123687>
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<DIV>An SMPS on the same board with a -140 dBM noise floor RX
will degrade the board.</DIV>
<DIV>Why make more noise, just remote the regulator or do a
better heat sink.</DIV>
<DIV>Any spurs are too much. Frank</DIV>
<DIV> </DIV>
<DIV> </DIV></TD></TR></TBODY></TABLE></DIV><BR>-----Inline
Attachment Follows-----<BR><BR>
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