Gary Pimm's MOSFET CCS

Fanuc · 31st March 2007, 02:04 PM

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

tomahauk · 31st March 2007, 10:18 PM

maybe this:

http://home.versatel.nl/horneman/bmosfet.htm

Fanuc · 31st March 2007, 10:29 PM

Great link. Thanks alot!!!

Fanuc · 31st March 2007, 10:43 PM

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.

leadbelly · 31st March 2007, 10:46 PM

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

31st March 2007, 02:04 PM	#1
Fanuc diyAudio Member Join Date: Feb 2006 Location: Leven, Fife	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

31st March 2007, 10:46 PM	#5
leadbelly diyAudio Member Join Date: Dec 2002 Location: Calgary, Alberta	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 __________________ Aerodynamics are for people who can't build engines. Enzo Ferrari

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31st March 2007, 10:18 PM	#2
tomahauk diyAudio Member Join Date: Dec 2005 Location: Ruda Œl¹ska // Poland	maybe this: http://home.versatel.nl/horneman/bmosfet.htm

31st March 2007, 10:29 PM	#3
Fanuc diyAudio Member Join Date: Feb 2006 Location: Leven, Fife	Great link. Thanks alot!!!

31st March 2007, 10:43 PM	#4
Fanuc diyAudio Member Join Date: Feb 2006 Location: Leven, Fife	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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