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Old 2nd September 2006, 03:51 PM   #1
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Default how to make above 100w zv9

i want to make zv9 for more power,
i know i must increase rail to rail voltage of zv9, and parallelize power jfet lu1014d , but because zv9 use cascode circuit ,
i must parallelize mosfets and jfets both . so how to do it ?

and after parallel , how can i use feedback , because parallelized jfets have serial resistor to attach G pin of jfet.

so anyone draw a schematic to me ,thanks
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Old 2nd September 2006, 05:19 PM   #2
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from top of my head-symetry or even susy is better way than paralleling in this case
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Old 2nd September 2006, 05:30 PM   #3
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It seems that john-china loves the 2nd harmonics . . .
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Old 2nd September 2006, 05:45 PM   #4
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Would it still be a Zv9?
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Old 2nd September 2006, 06:59 PM   #5
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I did some work/thinking about this idea also I can post what I have but, it's not exactly a ZV9 yet. It is more like a ZVSuper8. But, you are welcome to gather ideas and use anything in this pic to get were you want to go... Just some ideas
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Old 3rd September 2006, 01:22 AM   #6
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john-china, O.K. I did a little more work This should be a good topic for the thread This should get you close to 50W I believe O.K. it's not 100+ Watts I could not imagine needing more than this anyway
more power than this and we would need to call it Monster Zen Version 9
Any comments?
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Old 3rd September 2006, 11:34 AM   #7
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Quote:
Originally posted by flg
........
Any comments?


your circuit for cascode is as what i thought. i think whole circuit is like zv4 + zv9 because you use zvp3310 as input buffer. i dont like input buffer because i dont care high input capacitance. i can use diy pre amp to resolve this problem.

i saw you did not serialize any resistors to attach gate of jfet. you just attach gate of jfet togather straightly, is it feasible ?

your 50w circuit gave me much inspiration, thanks.
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Old 3rd September 2006, 11:41 AM   #8
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Quote:
Originally posted by Zen Mod
from top of my head-symetry or even susy is better way than paralleling in this case

at first do paralleling jfet, secondly do alephx+zv9(susy)

step by step . i can run whithout falling,
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Old 3rd September 2006, 01:59 PM   #9
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I have done some thinking with JFETs, SUSY and coupled inductor loading like ZV7-T Gsoz-t
You can change the load to the aleph CCS
Here is my latest schez
Only maybe 25Watts out
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Old 3rd September 2006, 03:39 PM   #10
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Quote:
Originally posted by flg
john-china, O.K. I did a little more work This should be a good topic for the thread This should get you close to 50W I believe O.K. it's not 100+ Watts I could not imagine needing more than this anyway
more power than this and we would need to call it Monster Zen Version 9
Any comments?
Since JFETs are high current devices, you can get away with just one while paralleling MOSFETs for CCS and Cascode circuits.

This was also mentioned by NP in another thread.

Allan
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