[sdiy] VCO unstable in Spice, stable in real world

[Tom Wiltshire]

One of the Roland DCO synths uses NAND gates to switch Sync on/off, like you suggest. I think it's the JX3P. You could have a look at the schematic for that for a few pointers if you can find a good copy. The one I've got is terrible...

HTH,
Tom


On 9 Feb 2011, at 21:27, Rutger Vlek wrote:

> 2) I have a few spare 4011 NAND gates, so I could probably wire these up to buffer the master's comparator output as well. But then I still need to fit voltage controlled switch somewhere. Maybe with some clever wiring the NAND gates could be the buffer and the switch at the same time? If one of the NAND inputs takes the CV to turn it on/off and the other takes the comparator output?