[sdiy] Re: Variable Waveform LFO

[François CHAUVET]

Hello all,

I designed a similar device, shaping from negative-going sawtooth to
positive-going sawtooth thru triangle, starting with a raising ramp
waveform.
It doesn't work quite well, at least on SPICE simulation. The "vertical"
reset edge of the initial sawtooth is viewed as a very fast negative-going
sawtooth, and morphed consequently. This may however provide funny waveforms
similar to the "snicster" by Ian Fritz (IIRC).

Very similar in principle to Don Tillman's "VC Duty Cycle". Schemos can be
found at:
http://hebergement-images.voiloo.net/viewimg.php?img=e8dcddce3737cafd8b77264
f9d739cd0.png
http://hebergement-images.voiloo.net/thumbnail-fe90de84110989f947fb4613e3362
936.png
http://hebergement-images.voiloo.net/thumbnail-6a970c6f8be3d272bdfaa3d528738
121.png
http://hebergement-images.voiloo.net/thumbnail-e65d094e7432fb4657416dcb5909e
2c0.png
and waveforms at:
http://hebergement-images.voiloo.net/thumbnail-16ffdce306af16b44d370d71a722e
878.gif
http://hebergement-images.voiloo.net/viewimg.php?img=53afbdddcb6412b23e0c7ae
3546aab68.gif
http://hebergement-images.voiloo.net/thumbnail-7ac67b8775858da53100f71f2e589
246.png
http://hebergement-images.voiloo.net/thumbnail-57808c3e9a21a5faeefe2deffc1d3
e95.png
http://hebergement-images.voiloo.net/thumbnail-180e6592d1b9f9d6a92656d2129f1
959.png
http://hebergement-images.voiloo.net/thumbnail-f6adafb9ce2eeacd30bfcdbfb9bc2
b09.png
http://hebergement-images.voiloo.net/thumbnail-5590c87e9bc917027ecec2c97c1b9
091.png

-- françois


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