[sdiy] Possible to Hard-Sync R. Schmitz CMOS VCO???

[René Schmitz]

cs e schrieb:
> How would someone go about adding hard-sync to Rene Schmitz's CMOS VCO
> (as seen here, in beautiful detail:
> http://www.uni-bonn.de/~uzs159/vco4069.html   ?

I would add some circuitry which triggers the schmitt trigger so that 
the natural discharge cycle can be externally initiated. Maybe couple 
some narrow pulses via a cap directly into the first of the two schmitt 
trigger gates.

Cheers,
  René