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- Path: sparky!uunet!math.fu-berlin.de!fauern!rz.unibw-muenchen.de!claude
- From: claude@bauv.unibw-muenchen.de (Claude Frantz)
- Newsgroups: sci.electronics
- Subject: Re: Voltage drop across 1N4148 diode?
- Date: 28 Jan 93 06:46:22 GMT
- Organization: University of the armed forces, Munich
- Lines: 26
- Message-ID: <claude.728203582@bauv106>
- References: <4u8lJfA3SL@tron.gun.de> <1993Jan21.101200.8651@mr.med.ge.com>
- NNTP-Posting-Host: bauv106.bauv.unibw-muenchen.de
-
- 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.
-
- According to the data sheet, it is allways made of silicon.
-
- >If the diode is made of
- >germanium (no, not the flowers) the drop is around 0.7V; if it
- >is made of silicon then the drop is around 0.5V.
-
- The voltage drop across a Ge diode is about 0.2 V, across a Si
- diode about 0.65 V, depending on the current, the temperature and
- the exact structure.
-
- >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.
-
- The 1N4148 is a high speed diode intended for switching applications,
- the 1N4001 is intended for rectifier circuits at low frequencies.
-
- Regards,
-
- Claude
-