"3. The 3458A still has got the best linear A/D, around 0.02ppm of input."
Is that a typo? Even 0.2 ppm would seem extremely good. I think I saw an official number of 0.1ppm somewhere. Probably 0.1ppm of range. And how do they implement that? Manual trimming and compensation?
Hello Jan, well DNL, INL, sometimes I still struggle with those terms.. Those 0.02ppm were nonlinearity of input, measured with a JJ array. And they use a special multiple slope scheme, with glitch compensation for the switching FETs. Just download the April 1989 HP Journal, there's everything explained in detail. http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1989-04.pdf Frank _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
