Any pointers on optimum design of low-noise JFET preamplifiers? Have a new project that will require low noise in a relatively narrow band around 30-100kHz.
Power consumption is also a consideration (battery operation of a lot of channels) so I'd prefer not to throw away too many watts in the front end. Do low Idss JFETs have an advantage?
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
The classic general reference is probably Motchenbacher and Fitchen. I think there's a different second author on the latest edition.
There are a number of papers in the literature related to preamps for gravity-wave detectors, maybe you can find them with Google Scholar. I know there have been some published in Reviews of Scientific Instruments, though I haven't really been keeping up with this area the last few years.
It'll take me a couple of days to excavate down to my references.
steve
There isn't any ham in my real email address.
Thanks, I'll pick up a copy of the 1973 edition.
Yes, you are right.
Thank, Steve. Apparently some of the old app notes are useful.
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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