[sdiy] Sine to Tri

[Roy J. Tellason]

On Thursday 30 March 2006 06:34 pm, Tim Parkhurst wrote:
> Okay, here's one I haven't seen before... I'm looking for a circuit to
> convert a sine wave into a triangle. Is there a function / circuit
> that would do this? Am I looking for an antilog amp?
>
>
> Tim (where the deer and the antilog play) Servo
> --
> "Imagination is more important than knowledge." - Albert Einstein

Easy enough.  Feed the sine wave into a schmitt trigger (build one around an 
op amp and you'll maintain your signal's amplitude,  it's just a couple of 
resistors).  Take the square-wave output of that and feed it into an 
integrator.  Which would work well for any given frequency,   though if you 
vary the frequency you'll have to vary the time-constant there too,  or the 
amplitude at the output will vary...

-- 
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space,  a critter that can
be killed but can't be tamed.  --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James 
M Dakin