[hpsdr] Power supply filtering

[Larry Taft]

While the spread poop method reduces the one big notchable spike to a 
mess that is below the FCC limit it still can be above the band noise 
floor and now unremovable.

Linears over all!

73, Larry  K2LT

Doug Gibbs wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> Has anyone considered using a spread spectrum switching regulator 
> controller to reduce the EMI effects? See the following links:
> 
> 
> http://www.eetasia.com/ARTICLES/2006OCT/PDF/EEOL_2006OCT09_EMD_RFD_TA.pdf?SOURCES=DOWNLOAD
> 
> http://www.maxim-ic.com/appnotes.cfm/an_pk/1077
> 
> http://www.elecdesign.com/Articles/Index.cfm?AD=1&ArticleID=3577
> 
> 
> Doug - W8NFT
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