Rick wrote:
If only this were true. Authors at NIST have consistently told me that the conditions of working for the government preclude them from mentioning the names of vendors. Thus you get generic JEDEC transistor numbers. Along with the fact that JEDEC numbers are useless concerning unspecified parameters, it tends to make NIST designs non-reproducible.
It's often much worse than that. NBS/NIST tends to require new designs to be compatible with existing equipment crates and frames, so designs are routinely compromised by legacy form factors, technologies, power supply availabilities, and other considerations that preclude building the best widget they know how to design. (There are some other contributing factors, as well.) You might think NIST wouldn't settle for anything less than the best they can do, but in fact "good enough" often rules the day.
can you please let the group in on the actual vendors and part numbers of the new era transistors accidentally having low flicker noise?
Zetex (Diodes, Inc) pioneered this new technology. There was some discussion on the list last summer (see, for example, <https://www.febo.com/pipermail/time-nuts/2015-July/092985.html>). There are also some discussions in the volt-nuts list archives.
I (and others) discovered these parts back in the '90s and have been using them "off label" for ultra-low voltage noise designs for 20-odd years. Then, the 3rd Edition of Horowitz and Hill's "The Art of Electronics" made it public knowledge. (Speaking of which, Chapter 8 is absolutely essential reading for anyone who even pretends to be designing low noise circuits.)
Best regards, Charles _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
