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Old 30th October 2011, 03:00 AM   #1
NYCOne is offline NYCOne  United States
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Default VFETs SITs - what would you build?

I've been very interested in the VFET threads and NPs SITs. At Burning Amp, the SITs were the talk of the event, literally.

So, I was thinking, if one were able to acquire a pair of N-Channel VFETs or SITs, what would you build?

A circlotron seems an interesting answer, but the designs I'm aware of take two transistors per channel, so the circlotron is out - the challenge is for a pair of outputs. One can use other FETs to bias, but only two VFET/SITs to design with.
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Old 30th October 2011, 11:18 AM   #2
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Old 30th October 2011, 06:21 PM   #3
Itsmee is offline Itsmee  England
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Something with a CCS load in the output stage, Zen V4, J2, F2, Aleph M.
Or a single device design, BOZ, SEWA - Seven Watt Amplifier
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Old 30th October 2011, 07:02 PM   #4
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You need to contact Mike Rothacher on these forums. He already has things cooking with the Sony VFETs.
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Old 30th October 2011, 08:30 PM   #5
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Don't need unobtainable devices, just Darlington or Sziklai arrangement of
Triode and BJT. Mu senses collector voltage of BJT, and the loop is closed.

Last edited by kenpeter; 30th October 2011 at 08:36 PM.
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Old 30th October 2011, 09:43 PM   #6
ra7 is offline ra7  United States
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Actually, the Sony part is a drop in for the IXYS part in the Delite amp. Just a few resistor value changes and supply voltage changes.
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Old 31st October 2011, 06:10 PM   #7
tmblack is offline tmblack  United Kingdom
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Was a video made at Burning Amp?
If only 2 N-channel SIT per channel, I would make a quasi-complementary ouput!
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Old 31st October 2011, 07:41 PM   #8
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I do have a nice comprehensive article on the subject, just about ready for release.

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Old 31st October 2011, 08:30 PM   #9
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Old 31st October 2011, 08:41 PM   #10
ra7 is offline ra7  United States
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Wow, this is great news! Publish! Publish! Publish!
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