> -----Original Message-----
> From: Alexandre Guimar=E3es [SMTP:alexg@MS.MICROLINK.COM.BR]
> Sent: Tuesday, June 18, 2002 10:49 AM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      [EE]: Are there any small germanium transistors still being
> manufactured ? I need lower vbe !!
>=20
> Hi,
>=20
>     Does anyone knows about any small signal germanium transistors =
that
> are
> still in production ???!!
>=20
>     I need slower vbe than silicon to use in a short circuit =
protection
> system. The 0.6 volts of silicon transistor makes me use a large wire
> wound
> resistor that could have it's value divided by 3 and would also get =
the
> dissipation much lower. For this application the leakage problems =
should
> not
> make any difference. It is either that or complex op-amps circuits =
and the
> thing has high side drivers wich make it harder to measure current. =
The
> project is very price sensitive so I am not able to use protected =
FET's.
>=20
> Best regards,
> Alexandre Guimaraes
>=20
Oops, I saw my stupid mistake just as I hit the send button!  The =
collector
would obviously go to whatever you are using to control voltage.

Mike

         Rsense
---+-----\/\/\/\/---+--------+------
   |                |       _|_
    \ e             \       \ /
      >|__________> /       -+- =20
       /| b          \        |
    / c             /        |
   |                |        |
   |                +--------+
   |                         |
   |                         \
   v To current limit        /
                             \
                             /
-----------------------------+------



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