Thermometry based on Diode leakage current wouldn't be impossible I suppose, you might loose some hair in the process.
The signal levels on the opamp are goofed too. On Tue, Jan 17, 2017 at 4:19 AM Charles Steinmetz <csteinm...@yandex.com> wrote: > Tom wrote: > > > > > That article has a major error. Anyone know what it is? > > > > Well, the author says the reverse current of a diode is "directly" > > proportional to temperature. This could suggest that he means the > > relationship is linear (the relationship is actually exponential with > > absolute temperature). But that's not really an *error* -- just sloppy. > > "Direct" does not necessarily imply "linear." An exponential > > relationship is "direct" in the sense that it is what mathematicians > > call "injective" (every temperature corresponds to exactly one value of > > reverse current). > > > > Then, in discussing the LM95235, he says that it can use the > > "collector-emitter junction diode" of a transistor as the sense element. > > Of course, a bipolar transistor has no collector-emitter junction. > > His diagram correctly shows a diode-connected NPN operating in the > > active region (forward biased, not reverse biased as the rest of his > > article discusses) as the sensor for the LM95235. > > > > Are any of these what you had in mind, or is there more? > > > > Charles > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.