[sdiy] High frequency VCO as BBD clock

[Vladimir Pantelic]

speaking of driving BBDs with fast clocks, Delay-1 by Joranalogue does 
this. Joran told me he put a lot of effort into making a special drive 
circuit for this.

https://joranalogue.com/collections/eurorack/products/delay-1

delays are 1ms - 50ms

not sure he is on the list?

V.

On 07.02.23 19:18, Rutger Vlek via Synth-diy wrote:
> Dear list,
> 
> For a while I've been working on a guitar pedal board for personal use. 
> I'm about to build the second revision of a solid state pre-amp, and was 
> thinking about possible modulation effects too. I would love a nice 
> (stereo) BBD flanger/chorus, but felt a bit fed-up with all the 
> 'classic' designs, particularly the traditional clocking scheme, usually 
> with a limited range, lack of current drive (to overcome capacitance of 
> the BBD clock input) and strictly linear modulation (calling for a 
> hyper-triangle modulation source).
> 
> Having some experience with designing saw- and tri-core VCO's around the 
> 2164, I was wondering how easy it would be to push the design of a 
> typical tri-core VCO with an 2164-based expo converter into higher 
> frequencies (let's say up to 500kHz) and use it to clock a BBD? Has 
> anyone tried? Or are there fundamental reasons why such frequencies are 
> not possible? I've never (intentionally) worked with circuits outside of 
> the audio bandwidth...
> 
> Rutger
> 
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