[sdiy] Floating Point A/D?

[James Patchell]

Floating point ADC's and DAC's are, in my opinion, not needed.  By its very 
nature, you can easily convert back and forth between twos complement and 
floating point quite easily....and floating point converters would have all 
the same problems as regular converters....just use a 24 bit 
converter...sit back, and enjoy the ride.

At 04:55 PM 3/9/2006 -0600, Grant Richter wrote:
>Just a silly thought.
>
>A slope integrating analog to digital converter (better a dual slope)
>uses a counter to measure the charging time of a capacitor from an
>unknown voltage to convert it to a digital representation.
>
>What if the counter used were a floating point variable?
>
>It would still be quantized, but at least the result would be
>directly in floating point format.
>
>Now if there were only practical a floating point DAC. I recall a
>discussion I read bout this. It is theoretically possible using a cap
>and an algorithm, but takes infinite time to resolve to a final value.

         -Jim
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