[hpsdr] SMPS the wrong way to go

[Mack Rogers]

Now you've got me going duh! Your statement is also logical.
 
Now you see why I let other people do the design work and wait for a refined and finished product!
 
The ball is back in your court Frank.
 
A cold Guinness Draught will soon clear my mind.
 
Mack Rogers
N4VGB
 
 

--- On Tue, 8/10/10, John Miles <jmiles at pop.net> wrote:


From: John Miles <jmiles at pop.net>
Subject: Re: [hpsdr] SMPS the wrong way to go
To: hpsdr at lists.openhpsdr.org
Date: Tuesday, August 10, 2010, 7:27 PM


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



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
 
 
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