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Article #5335Need JFET current limiter circuit
From: joseph.g.klinger
Date: Mon, 23 Jul 1990 22:24
Date: Mon, 23 Jul 1990 22:24
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1178 bytes
I've been looking for JFET current limiter diodes and have come to two conclusions: 1) they're too expensive, $5 ea for a 1N5314, down only to $0.85 in thousands for a J557 (not cheap for a quantity price). 2) they're hard to find, not much bigger than 10 mA, and not common enough to ever get cheaper or more available. Are there cheaper devices? Part numbers? I could deal with maybe $0.25 in quantity; after all, it's only a diode :^) How can I build the equivilent to a 10 mA AC (I want to pass both halves of the AC waveform) current regulator, using cheap JFETs, resistors, and perhaps zeners? Thanks, -- Joe Klinger att!iexist!jgk Disclaimer - AT&T may not aggree with the opinions expressed in my comments.
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arc1-ca.pugleaf.net!utzoo!attcan!utgpu!news-server.csri.toronto.edu!mailrus!uwm.edu!zaphod.mps.ohio-state.edu!sdd.hp.com!ucsd!pacbell.com!pacbell!att!cbnewsc!jgkShow Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!news-server.csri.toronto.edu!mailrus!uwm.edu!zaphod.mps.ohio-state.edu!sdd.hp.com!ucsd!pacbell.com!pacbell!att!cbnewsc!jgk From: jgk@cbnewsc.att.com (joseph.g.klinger) Newsgroups: sci.electronics Subject: Need JFET current limiter circuit Message-ID: <1990Jul23.222401.26115@cbnewsc.att.com> Date: 23 Jul 90 22:24:01 GMT Distribution: usa Organization: AT&T Bell Laboratories Lines: 20