[sdiy] Four pole highpass with OTAs, based on Polyfusion (student project demo)

[David G. Dixon]

> > http://www.youtube.com/watch?v=d9tphjlyp2U
> >
> > http://www.youtube.com/watch?v=CCUyOX3QuNs

Nice ones!  However, your triangle, ramp and square waves don't look
triangular, rampy, or square!  I'm assuming this is because the scope is set
to ac coupled mode?