Article View: sci.electronics
Article #10405Re: Surge protection for Cheapernet
From: Christopher J. Pikus
Date: Mon, 25 Feb 1991 13:36
Date: Mon, 25 Feb 1991 13:36
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From article <4480@mint17.UUCP>, by wilner@motcid.UUCP (Corey S. Wilner): > I have an interesting design problem. I need to protect a Cheapernet > LAN tap from voltage surges. I have to pass a specification that > states either 800 or -800 volts can be applied to my BNC center conductor > with respect to the outer ground conductor. > > ******************************************************** > Corey S. Wilner | | __o > Motorola Cellular | ..!uunet!motcid!wilner | -\<, > 708-632-7206 | motcid!wilner@uunet.UU.NET | O/ O > ******************************************************** Corey, From several of the ethernet cards that I have seen, many designers solve this with a NEON BULB connected accross the BNC. It should present almost no capacitance and have high breakdown voltage. A dropping resistor is optional (although I never saw one used). -- Wax your board, waste your brain, and pray for waves... Christopher J. Pikus, Megatek Corp. INTERNET: cjp@megatek.uucp San Diego, CA UUCP: uunet!megatek!cjp or ucsd!megatek!cjp
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arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!usc!orion.oac.uci.edu!ucivax!megatek!cjpReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!usc!orion.oac.uci.edu!ucivax!megatek!cjp From: cjp@megatek.UUCP (Christopher J. Pikus) Newsgroups: sci.electronics Subject: Re: Surge protection for Cheapernet Message-ID: <1489@valhalla.megatek.uucp> Date: 25 Feb 91 13:36:40 GMT References: <4480@mint17.UUCP> Distribution: sci Organization: Megatek Corporation, San Diego, Ca. Lines: 22