on oscillators

[Fraser, Colin J]

> -----Original Message-----
> From: Martin Czech [mailto:martin.czech at intermetall.de]
> Sent: 22 February 2000 12:55
> To: Fraser, Colin J; oakley at techrepairs.freeserve.co.uk
> Cc: synth-diy at mailhost.bpa.nl
> Subject: RE: on oscillators
> 
> :::From: "Fraser, Colin J" <Colin.Fraser at scottishpower.plc.uk>
> :::To: "'Tony Allgood'" <oakley at techrepairs.freeserve.co.uk>, 
> synth diy 
> <synth-diy at mailhost.bpa.nl>
> :::Subject: RE: on oscillators
> :::Date: Tue, 22 Feb 2000 12:20:25 -0000
> 
> :::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 ?
> 
> This would basically mean a second slave oscillator with hard sync.

Yes, but using a 13x00 both otas are on 1 IC, and share the same control
current source, so it's a very minimal increase in part count - a couple of
caps and a reset fet.


Colin f