[sdiy] Hopf bifurcation VCOs

[Don Tillman]

   > Date: Fri, 11 Nov 2005 11:34:21 -0700
   > From: Ian Fritz <ijfritz at earthlink.net>
   > 
   > At 10:21 AM 11/11/05, Don Tillman wrote:
   > >
   > >   "A Quadrature Trapezoid Voltage Controlled Oscillator"
   > >   http://till.com/articles/QuadTrapVCO/index.html
   > 
   > I don't see anything there about ***sinusoidal***. Please show me
   > what I am missing.

It's very easy to get quadrature sines from the QuadTrap VCO -- sum
the quadrature trapezoid outputs to make quadrature triangles and use
a couple OTA's to shape the quadrature triangles to sines.

  -- Don

-- 
Don Tillman
Palo Alto, California
don at till.com
http://www.till.com