Successors for V-FET SONY-Yamaha-TOKIN 2SJ28, 2SJ18/2SK60, 2SJ26/2SK76 and 2SK180

[scooperman]

I'm not entirely sure this is even possible, but I'll bounce it off the wall and see what sticks anyhow...

What if you abuse a 4 terminal MOSFET ...

Apologies, just happened to see this old post today. Because I wasn't paying close attention while reading, my first thought of "four terminal MOSFET" was a SENSEFET, the old Moto MTP10xxx parts that I used to make some isolated solid state relays with zero-cross turn on and turn off. Then I realized you were talking about FETs with a separate substrate pin. Then I started wondering about those Moto parts again...what could I do with that current sense terminal... measure a portion of the output current, compare that with a tube model, feed the difference back to the drive. Seems like someone would have tried by now, maybe Pritchard, but can't find anything.

 

[tiefbassuebertr]

A manufactur of such military microwave devices would be in the best position, this V-FETs reintroduce. Tokin or Lovoltech e. g. An other name for V-FET are "Static Induction Transistor" see about
http://nsr.mij.mrs.org/4S1/G6.41/article.pdf
What actually happened with the old wafer production equipment and documantations by Sony and NEC?

Are there any news ?

The mentioned link is death in the meantime. The title of that paper was follow:
"Modeling of a GaN based Static Induction Transistor"
Authors: Gabriela E. Buneaa1, S.T. Dunhama and T.D. Moustakasa
- go to
Cambridge Journals Online - Abstract

more URLs:
http://www.patentgenius.com/patent/RE42955.html
http://www.patentstorm.us/patents/RE42955/claims.html