Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!olivea!decwrl!world!jon_sree From: jon_sree@world.std.com (Jon Sreekanth) Newsgroups: sci.electronics Subject: Impedance of a diode ? Message-ID: Date: 22 Jan 91 05:58:10 GMT Sender: jon_sree@world.std.com (Jon Sreekanth) Distribution: sci Organization: The World Lines: 24 Hi, A rather curious query : what is the audio frequency impedance of a reverse biased diode ? Off-hand, one would say, it's high, but just how high ? Specifically, for a small signal diode like 1N4148, between 0 - 70 C, with about 2.5 V or more of reverse bias, is the small signal audio impedance at least > 1 Meg ? 10 Meg ? I don't need an exact number, just a minimum, to see if it interferes with other circuitry. Where does one look for such info ? Diodes and transistors are just there, one dosen't usually look at data books for them, so I realize I have many many chip data books, but none for discretes. Thanks, / Jon Sreekanth Assabet Valley Microsystems Fax and PC products 346 Lincoln St #722, Marlboro, MA 01752 508-562-0722 jon_sree@world.std.com