[sdiy] Glide question

[Tom Wiltshire]

There's an example of a voltage-controlled glide in the Pro-One schematics. Unfortunately it uses the hard-to-find CA3280, but you could use a LM13700 like David suggested. Or even a CA3080 - saves wasting half a chip.

Olivier mentioned 'constant rate' and 'constant time' glide, and that an RC filter (VC or not) gives you constant time. An integrator (again, VC or not) would give you constant rate. There is one other difference between them - one is a cap charging curve, and therefore the glide slows down as it approaches the target note, whereas the other is linear wrt to pitch and glides at the same rate all the way to the target.

T.


On 4 Sep 2010, at 20:05, cheater cheater wrote:

> Hi guys,
> a glide circuit is usually a first-order RC filter applied to the
> V/Oct CV, right? Are there any other prevalent designs? If I wanted to
> realize this in an active (voltage-controlled) fashion, what would be
> the best way to do it?
> 
> Thanks,
> D.
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