[sdiy] LM13700 crossfade query

Tom Bugs admin at bugbrand.co.uk
Wed Jun 15 14:54:30 CEST 2011


Great - thanks - and for the tip on keeping traces short - I would do 
anyways, but good to point it out.

I had a look at ESQ1 schematics and while they don't have LM13700s, they 
do do the summing of the CEM3379 outputs in this manner.

Cheers, Tom

On 15/06/2011 13:21, Olivier Gillet wrote:
> Looks good to me. You can find a similar topology in some polysynths,
> where each voice's VCA current output - just like the LM13700 outputs
> - are fed straight into an op-amp in "transimpedance" configuration (I
> think I've seen that on the ESQ-1).
>
> As it has been discussed a few times here, you should keep the 2
> traces from the LM13700 outputs to the op-amp as short as possible.
>
> Olivier
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1382 / Virus Database: 1513/3704 - Release Date: 06/14/11
>

-- 
BugBrand LTD
UK company No. 07199808
VAT No. GB 988 2629 57
1 Ninetree Hill
BRISTOL BS1 3SB
United Kingdom
www.bugbrand.co.uk



More information about the Synth-diy mailing list