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Old 14th January 2011, 02:30 PM   #561
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I have seen now the schematic on forum pag. 49

There is a current locker so these mosfet are not like lateral

Last edited by audiodesign; 14th January 2011 at 02:43 PM.
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Old 14th January 2011, 02:45 PM   #562
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I see 29 pages - that's browser/user dependable

be more specific - which post exactly
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Old 14th January 2011, 02:56 PM   #563
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This one?
FirstWatt J2

Quote:
There is a current locker so these mosfet are not like lateral
Not mosfets but power Jfets
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Old 14th January 2011, 05:16 PM   #564
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What is a "Current Locker"?

These SiC JFETs are lower threshold like Laterals though. And that seems to be an issue with the output biasing that is not quite typical Pass? Even the 1.25V version of TL431 might not cut it? Or maybe no one makes it anymore???
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Old 14th January 2011, 05:23 PM   #565
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O.K. Page 50 explains a little more. A TL Reg may work but Papa says it is less stable or "would need adj..."

"Current Locker" you mean the over current protection Q1?
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Old 14th January 2011, 05:27 PM   #566
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I=2A

40C : Ugs=1V576
70C : Ugs=1V581

TempCo
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Old 14th January 2011, 05:56 PM   #567
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.16mV/C Are you kidding? Is that in the data sheet?
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Old 14th January 2011, 06:03 PM   #568
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let's say just that Mighty ZM measured that

not thoroughly with CCS biasing , but with plain power resistor between PSU and drain

gate was tied to drain , of course

in any case - let them bleed ......... and do not worry too much

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Old 14th January 2011, 06:08 PM   #569
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this
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Old 14th January 2011, 06:10 PM   #570
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what with this ?

that's plain CCS .

rephrase question , so we can answer
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