Ping: Gurus. MAT-04 EXPO for (2) VCO

[Haible Juergen]

>     The MAT04 is diffusion isolated, so the substrates must be connected
> to
> the most negative potential.  The THAT transistor arrays are dialectricly
> isolated, but they don't have the low Rbe that the MAT04 has.
> 
All right, I was a bit sloppy. If you have to tie it to -Vb, so be it.
Bypass
the substrate pin to GND with a ceramic capacitor then.

JH.