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Article #9625

Impedance of a diode ?

#9625
From: Jon Sreekanth
Date: Tue, 22 Jan 1991 05:58
24 lines
1203 bytes
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
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From: jon_sree@world.std.com (Jon Sreekanth)
Newsgroups: sci.electronics
Subject: Impedance of a diode ?
Message-ID: <JON_SREE.91Jan21215810@world.std.com>
Date: 22 Jan 91 05:58:10 GMT
Sender: jon_sree@world.std.com (Jon Sreekanth)
Distribution: sci
Organization: The World
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