[sdiy] Replacing CA3080 with CA3046 ??

[karl dalen]

--- Antti Huovilainen <ajhuovil at cc.hut.fi> wrote:
> On Sat, 9 Apr 2005, Tim Parkhurst wrote:
> 
> > http://www.idg.se/personal/bergfors/bergfotron/VCA.htm
> > This comparison shows that actually the lowly 13600 makes a pretty darn
> good
> > VCA. This list includes the 3080 , the SSM2024, 3046 and 3086-based OTAs,
> > amongst others. It doesn't include the 3280 or 5517 however.
> 
> What is the reason for the higher offset of the LM13600 circuits compared 
> to CA3080?
> 
> Antti - Who will need some 40 VCAs for one project...

The thing with the 13600 and 700 is that the offset is not constant,
it responds in a somewhat eliptical fashion depending on varying Iabc,
from some 500uV to 25mV and back, i tested this long time ago about
12-15 13700 they all shows this in varying amount. Used the classic PNP 
Iabc source expo.

Reg
KD