I need to deign a controlled current source for several tens of uA say about
150uA witch have to be very accurate and vary stable. I'd like to control
this source by some sort of DAC preferably use a 12bit V out DAC witch I
already have on board.
So far searching Analog, Liner ,Maxim, etc.. have gotten me no where.
Pleas help.
Nir goren
BGU uni
VLSI Center
Cheers!
Chip Shults
My robotics, space and CGI web page - http://home.cfl.rr.com/aichip
"Sir Charles W. Shults III" <aich...@OVEcfl.THISrr.com> wrote in message
news:C2vVa.176582$ic1.4...@twister.tampabay.rr.com...
Use a PNP transistor with the emitter connected to a precision
resistor which is connected to V+. Connect a Digital to Voltage
Converter between V+ and the base of the transistor.
The Voltage across the resistor will be the same as the DAC voltage.
The current will be V/resistance. This current will be available at
the collector of the transistor.
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