>If you then use a R-3R-9R-27R network to sink and source current it is
>possible to get a reasonably linear response. (depending on how little
>current the tri-state input sinks) Each output can occupy three states
>Hi,Lo, or Tri. Here are the first few codes. Generating the remainder is
>left as an exercise for the three-fingered student from Sirius.

Very nice use for base-3 math.

>P.S. The three fingered alien came from Sirius because everyone knows the
>little green men come from Alpha Centauri ;-)

I thought you were referring to somebody's typing style/ability! <G>

Andy


==================================================================
Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865
          Hardware & Software for Industry & R/C Hobbies
        "Go fast, turn right, and keep the wet side down!"
==================================================================