[sdiy] Triangle-to-saw conversion

[Tim Parkhurst]

On Tue, Feb 16, 2010 at 9:54 PM, ASSI <Stromeko at nexgo.de> wrote:
> On Wednesday 17 February 2010, Aaron Lanterman wrote:
>> Saw-to-triangle is pretty easy to explain, but the other way around
>> is trickier.
>
> The "explain" part is pretty easy: you flip the polarity of the signal
> each time the direction of the ramp reverses.  Under which conditions
> this works and how to do it in practise is left as an execise for the
> student.  Bonus points for coming up with an idea to have the triangle
> and saw run at the same frequency. :-)
>
> Achim.
>

Actually, the method that Paul and I described do this (produce a saw
at the same frequency as the triangle). If you don't offset the
triangle (or offset it slightly in the 'wrong' direction) you actually
can get a saw at 2x the triangle frequency, which can also be useful.


Tim (what's the frequency, Kenneth) Servo
-- 
"Sire, the church of God is an anvil that has worn out many hammers."
- H.L. Hastings