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bigwill 12th January 2009 04:45 PM

Gary Pimm self bias CCS but without LND150
I would like to build the circuit as featured here:

Unfortunately, the depletion mode mosfet LND150 is expensive and hard to get.

Are there any alternatives or a way to use normal low voltage JFETs in their position with a high voltage standoff transistor?

lineup 12th January 2009 05:04 PM

Supertex has got some good depletion mode mosfets
They should be able to find and buy

They comes in packages: TO-92, TO-220, SOT-89
Current IDSS Max is in the 100-200 mA range

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