[sdiy] Berfotron/Buchla now triangular, but with 4KHz offset!

[Ian Fritz]

At 07:09 AM 4/29/2008, Scott Gravenhorst wrote:
>Aaron Lanterman <lanterma at ece.gatech.edu> wrote:
>
> >5) Oh, here's the wild part: we can COMPLETELY DISCONNECT THE EXPO
> >CONVERTER altogether - i.e. disconnect the emitters of the diff pair
> >in the OTA from the collector of the right transistor of the expo
> >converter - and it still happily oscillates in the kHz range!


What does it look like on the scope?  Do the two waveforms look like a 
proper tri/square?  Or is it self-oscillating from feedback.  (You've read 
and followed the precautions in the application hints section of the 311 
data sheet?)

Ian