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- Newsgroups: sci.electronics
- Path: sparky!uunet!spool.mu.edu!uwm.edu!uucp.mr.med.ge.com!news.mr.med.ge.com!szopinsk
- From: szopinsk@picard.med.ge.com (Jerry Szopinski Mfg 4-6983)
- Subject: Re: Voltage drop across 1N4148 diode?
- Message-ID: <1993Jan22.101219.18811@mr.med.ge.com>
- Sender: news@mr.med.ge.com
- Nntp-Posting-Host: guppie
- Organization: GE Medical Systems, Magnetic Resonance
- X-Newsreader: TIN [version 1.1 PL6]
- References: <1993Jan21.180716.5155@wkuvx1.bitnet>
- Date: Fri, 22 Jan 93 10:12:19 GMT
- Lines: 43
-
- scottcr@wkuvx1.bitnet wrote:
- : In article <1993Jan21.101200.8651@mr.med.ge.com>, szopinsk@picard.med.ge.com (Jerry Szopinski Mfg 4-6983) writes:
- :
- : > The voltage drop across the 1N4148 diode depends on what type of
- : > semiconductor material it is made of. If the diode is made of
- : > germanium (no, not the flowers) the drop is around 0.7V;
- :
- : What? lets try .2 -.3 for Germanium.
- :
- : > if it
- : > is made of silicon then the drop is around 0.5V.
- :
- : How about .6 - .7 ?
- : >
- : > The 1N4148 is usually used in computer applications and most
- : > general purpose circuit board applications where small currents
- : > are used. I agree that the 1N4001 would be a better diode for
- : > this particular application.
- : >
- : >
- : > Jerry
- : >
- : By the way, a 4148 (at least used to be) silicon.
-
-
-
- O.K., people, I made a mistake. I knew that there was a difference in
- the voltage drops between germanium and silicon diodes, I just didn't
- remember which went with which. Sorry.
-
- But I have seen/used germanium 1N4148s. I was working on some military
- applications a couple of years ago, so the germaniums might be MIL-spec'd.
- If my memory serves me right there is a physical size difference between
- the two, but I don't remember which is which.
-
-
- Jerry
-
- "It riles them to believe that you perceive the web they weave and keep on
- thinking free!" -- Moody Blues
-
-
- : --
-