[sdiy] Replacing CA3080 with CA3046 ??

[srnovak at ncsu.edu]

Seems easy enough to fix, just swap the functions of Q5 and Q4. As you can
probably tell by my wording I'm a little more use to MOSFET design and not
BJT design, so would the input current to the differential pair cause a
problem? It seems most OP-AMPS now a days use JFET or MOSFET input stages,
and they draw very little current. Also any thought on compensation
capacitors between the output and the differential stage? I'm hoping I can
get by without one since I'm only concerned with audio frequencies. 
Thanks

Steven

On Apr 8, 2005, at 6:43 PM, Tim Ressel 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...)