[sdiy] Speaking of OTAs....

[Neil Johnson]

Paul wrote:
> Ca3080 or LM13600.. also point oof interest, dont forget the current
> limiting resistor inline with the control signal, makes a nice pop and
> little crater in the top of the IC if you dont :-)

Are these the words of experience, Paul?

I do remember many years ago, while I was an apprentice, I came across an
oldish opamp, LM308 IIRC, that didn't like its comp pins briefly touching
+ve supply ... resulting in a little black volcano erupting from the top
of the chip, complete with smoke.  Needless to say as a budding engineer I
had to repeat this little experiment several times just to confirm that it
wasn't a one-off!!!

:-)

--
Neil Johnson :: Computer Laboratory :: University of Cambridge ::
  http://www.cl.cam.ac.uk/~nej22           +44 (0) 1223 334 477