[sdiy] Replacing CA3080 with CA3046 ??

[James Patchell]

The MAT04 is dialectically isolated (the CA3046 is junction 
isolated)...also, the THAT 3xx transistor arrays are dialectically 
isolated, so you don't have to worry about which pin is more negative that 
which...

However, in general, building your own OTA is sortof a loosing 
proposition.  However, I have made simple OTA's, using a THAT340 PNP/NPN 
array (two NPN's and two PNP's) that work out pretty good for cloning the 
SSM2040 VCF...still...it is a rather expensive solution...

         -Jim

At 03:13 AM 4/9/2005 +0300, Samppa Tolvanen wrote:
>On Apr 9, 2005 1:43 AM, Tim Ressel <madhun2001 at yahoo.com> wrote:
> > Yo,
> >
> > Don't forget the oft overlooked pin 13 requirement.
> > The substrate of the IC (pin 13) needs to be at the
> > lowest voltage the part is likely to see. Otherwise
> > some internal dides conduct and spoil the party. Keep
> > this in mind when designing Q5 into your circuit.
> >
> > --Tim Ressel (rubbing the scar where he was bit...)
> >
>´
>Could MAT-04's have some "bias". pleaseee? LIke a negative one-- down
>there.. anx, Samppa
>å.s. Down  I went

         -Jim
***************************************************************
http://www.oldcrows.net/~patchell

***************************************************************