[hpsdr] SMPS the wrong way to go

[John Miles]

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.

-- john, KE5FX
  -----Original Message-----
  From: hpsdr-bounces at lists.openhpsdr.org
[mailto:hpsdr-bounces at lists.openhpsdr.org]On Behalf Of Mack Rogers
  Sent: Tuesday, August 10, 2010 2:39 PM
  To: hpsdr at lists.openhpsdr.org; FRANCIS CARCIA
  Subject: Re: [hpsdr] SMPS the wrong way to go


        I'm no solid state design guru BUT that seems a very valid point.

        Mack Rogers
        N4VGB



        --- On Tue, 8/10/10, FRANCIS CARCIA <carcia at sbcglobal..net> wrote:


          From: FRANCIS CARCIA <carcia at sbcglobal.net>
          Subject: [hpsdr] SMPS the wrong way to go
          To: hpsdr at lists.openhpsdr.org
          Date: Tuesday, August 10, 2010, 4:14 PM


          ***** High Performance Software Defined Radio Discussion List
*****


                An SMPS on the same board with a -140 dBM noise floor RX
will degrade the board.
                Why make more noise, just remote the regulator or do a
better heat sink.
                Any spurs are too much. Frank




          -----Inline Attachment Follows-----


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