on oscillators

[Fraser, Colin J]

> -----Original Message-----
> From: Tony Allgood [mailto:oakley at techrepairs.freeserve.co.uk]
> Sent: 21 February 2000 20:01
> To: synth diy
> Subject: Re: on oscillators
> 
> I used a triangle core for my 
> latest VC-LFO
> design, but generating a good quality sawtooth that had no glitches or
> f/2 modulation is difficult. I think I will go for sawtooth for audio
> rate VCOs. Simple LFOs can be triangle cores; a single 13700 can
> generate square, sine and triangle outputs. And the SSM2220 is still
> available for the pnp pair. And for HFVCOs, the OTA based designs do
> very well at speeds up to 300KHz.

Wasn't Juergen Haible building a triangle core vco with a second timing cap
(with either half the charge current or twice the capacitance) to generate a
glitch free sawtooth, synced to the start of the tri wave cycle ?
Juergen ?

Colin f