dmarten@nmsu.edu (MARTEN) (04/19/91)
Hello all, I have a problem here that I have not been able to
solve, so I hope that somebody here
can answer it (or at least have a few ideas) for me...
Ok, here's what I am trying to do:
I am using an A/D chip that requires a -12V reference voltage
to operate. My problem is that I have only +5V and +12V to work
with (from a battery with a voltage regulator on it) and the -12V
must be referenced to the same ground as the +5V and +12V.
So my question is, does anybody know of a way to get an A/D
converter to run on positive voltage, or do you know of a way to
"invert" the 12V to make it negative?
I was thinking of somehow doubling the voltage and creating
a floating ground and reference from there, but I'm not sure that
would work.
Please Email me any ideas, comments, etc.
Thanks a lot!
!================================!
David Marten
New Mexico State University
internet: dmarten@nmsu.edu
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