Hello Bob Blick,

> If you get the data sheet for the National Semiconductor LM13600 there is
> an application with a voltage controlled lowpass filter. It uses one half
> of the chip, six resistors and one capacitor.

    This chip is very interesting, althought National says it's obsolete.
Can't find a substitute. :(

    Regarads,

    Brusque

-----------------------------------
Edson Brusque
Research and Development
C.I.Tronics Lighting Designers Ltda
(47) 323-2685  /  (47) 9993-6453
Blumenau  -  SC  -  Brazil
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