[sdiy] Low Frequency Square to Sine Waveshaper

[Paul Perry]

Boring or not, that EDN circuit is only 4 bits, so it's going to be very
lumpy indeed.

How difficult would it be to extend the principle to 12 bits say?
(impossible for a non-mathematician like myself, but there is obviously 
Talent on this list..)

paul perry Melbourne Australia

-----Original Message-----
On Montag 26 Mai 2008, Neil Johnson wrote:
> > http://electronicdesign.com/Articles/Index.cfm?ArticleID=6293
>
> Ah yes, Walsh functions.
But only the boring subset of Rademacher functions is used in this 
circuit.  Could be easily extended to use Walsh functions by adding a 
couple more 4030 and resistors, though.
Achim.