LM 13600 question

[Paul Perry]

At 06:58 PM 21/01/99 +1100, Stewart Pye wrote:

>I'm building a filter based on the MS 20. I was wondering if it's safe to
>use just a series resistor (15k) for the bias input (as in the data sheet)
>and have this coming off the wiper of a 10k pot?? I want to try it like
>this before I build the expo converter. I don't want to keep blowing up LM
>13600's. I'm missing a few pages from the data sheet.

Well, it is safe, a 20k one would be even safer.. but, the problem is this:
it really wants to be fed from a current source, and at low currents it 
behaves pretty 'funny', and difficult to get the full range out.
Now when I drive one, I always use a current source.
It's a hassle, but worth it.
The one on tomg's MS filter clone works just fine.

paul perry Frostwave P/l Melbourne Australia