Exponential ADC

[Paul Maddox]

Dear all,

  Heres a good un for you..

 I want to get an Exponential ADC, ie an ADC that I can scale such that 1V
increase doubles the value on the output. I would like 16Bit (24 bit would
be superb!), 14 would be acceptable and I dont think 12bit would do.

  Short of using an Epoxnential convertor and then driving a normal ADC I
wondered if anyone had any suggestions?
  Are there any Exponential ADCs out there? if so where I cant find them.

  Paul
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