LM13600 vs LM13700N

[Edu Silva]

De: Jezz Brookes <jbrookes at bluebear.freeserve.co.uk>
 
> Having a tidy up the other day I stumbled across a tube of 24 x LM13700N.
> Lucky me! Is the LM13700N a drop in replacement for the LM13600N in VCO
> applications?

You'll need to place a FET before the darlington buffer to raise its input
impedance (higher than in the 13600, but not enough). Or you can use an
opamp follower at the OTA output, bypassing the darlington.

Edu

_____________________
ES2 Audio - Som & Luz
Salvador-Bahia-Brasil