Maybe a simple low pass filter from mini-circuits will work.

-----Original Message-----
From: John Nall [mailto:jnall01@ALLTEL.NET]
Sent: Friday, June 20, 2003 3:08 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC]: DSP (was: Square wave to sine wave - how?)


At 10:24 AM 6/20/2003 -0600, Tim Webb wrote:

>Check out these URLs they might help provide a lot of information that
>would allow you to  understand how to convert a square wave into a sine
>wave.  Typically a filter can be designed to remove all of the =
harmonics
>after the fundamental frequency and that ideally would produce a =
perfect
>sine wave.
>
>A Sine wave has only the fundamental frequency with no other harmonics

Roger that.  I had no idea that it was such a complicated thing to
do!!   And this response is meant to express thanks to the others that
responded (including Grumpy Olin :-)

So it looks to me from going through the responses, that filtering is =
the
way to go.  OK.  I can deal with that.  One further question to throw
out:   As a Ham of about 36+ years (which probably entitles me to some =
sort
of pin) I feel pretty sure I can construct a filtering circuit.  But it
ALSO looks like some digital signal processing (DSP) might come in handy
here.  Anyone have any thoughts on that???

John

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