[sdiy] Linear current source - temperature compensation?

Justin Owen juzowen at gmail.com
Sat Nov 12 14:29:16 CET 2016


Hello,

The classic Electronotes current source has a linear input. It's possible to chop out some of the exponential parts and just have a linear current source based on that design - however, you lose the two standard Tempco placement positions.

So - is it possible to temperature compensate a linear-only current source?

1) Please ignore the component values...
2) I'm assuming the same temperature variation/dependance exists in the linear version...

http://www.sdiy.org/juz/source_exp.png - exponential

http://www.sdiy.org/juz/source_lin.png - adapted to linear only

Thanks,

/ Justin






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