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Old 31st March 2007, 02:04 PM   #1
Fanuc is offline Fanuc  United Kingdom
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Default Gary Pimm's MOSFET CCS

Someone wrote this in another CCS thread. I have heard of this before.

"Those are somewhat at odds. I have read references on this forum and AA that Gary Pimm's hybrid CCS is the cat's meow, but it takes some effort to implement. His MOSFET CCS is again very well respected, but it is more complex than those circuits you listed."


Does anyone have a schematic or article. ?

Thanks
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Old 31st March 2007, 10:18 PM   #2
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maybe this:

http://home.versatel.nl/horneman/bmosfet.htm
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Old 31st March 2007, 10:29 PM   #3
Fanuc is offline Fanuc  United Kingdom
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Great link. Thanks alot!!!
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Old 31st March 2007, 10:43 PM   #4
Fanuc is offline Fanuc  United Kingdom
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Actually that is quite interesting to see MOSFET CCS's although they have higher noise levels than junction FETs.

You should be able to get away with an RC filter in common gate mode I think.

Supertex make some great mosfets.

I used to have a link to a website that had CCS's that were battery powered. They showed impedance plots etc. Unfortunately I have lost. I think it was mostly for tube stuff though.
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Old 31st March 2007, 10:46 PM   #5
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I wrote that. Gary took his site down but some content is accesible through the Wayback Machine:

http://web.archive.org/web/200504101.../self_bias.htm
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