At 11:44 AM 11/18/02 -0500, you wrote:


>Working with this kind of components for long, the easier way is using
>table and interpolation. Works like a charm.
>Polynomial formulas also work nicely, sometimes just the long math uses
>more program memory than the tables, soooo....

Yes, it really depends what you are doing. In some cases, I am
designing instruments that can accept any one of ten or fifteen
sensors, so the data compression aspects come into play.

I don't know firsthand how the 4-bit micros used in consumer thermistor
thermometers do it,  but I was told by a Japanese engineer involved with
the original joint venture to develop these that it was an equation,
rather than a simple LUT.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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