At 03:57 PM 10/28/98 , you wrote: >LM13600 good down to the 10's of nanoamp range. I used it in the >FatMan as a low pass VCF my starting point was the data sheet VCF >with some Simonton exponential conversion etc. Go For It!! > Well, can you tell some something more about this Simonton exp conversion? Websites, etc..?? Thanks, smilen & TJ