[sdiy] Re: VCO reset time for BBD-based PM

[René Schmitz]

Hi Jürgen,

> I think my storm tide flanger clock VCO goes over 1MHz, but it's ben some
> time since I
> measured it. Tracking is not overly good, though, and it does need some
> hefty HF compensation.
> http://home.debitel.net/user/jhaible/jh_storm_tide_1.pdf

Shouldn't Q4s collector be tied to a negative supply? I would be worried
about getting into the saturation region in that emitter follower.
And I must say I don't see how R14 would affect the switching threshold
of the gate. Wouldn't this only slightly increase the impedance of your
current source? (IMO the pot would need to be put between the cap and
the gate input/fet, the diode directly to the cap.)

> Interesting! Do you have a circuit example for this?

Sorry, but to date this only exists in my head.

Cheers,
  René

-- 
uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159