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Old 3rd December 2016, 02:04 AM   #11
flocchini is offline flocchini  United States
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Thanks Nelson

I knew there was a reason to hold on to those R085s
Standard PSU is already available

Thoroughly enjoyed your talk. As always learned a tremendous amount and it was a real pleasure to listen to this amp

Last edited by flocchini; 3rd December 2016 at 02:07 AM. Reason: add thought
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Old 3rd December 2016, 05:45 AM   #12
2 picoDumbs is offline 2 picoDumbs  Australia
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Quote:
Originally Posted by Zen Mod View Post
oh boy ...... here we go again

I'm outa here and outa electronics

not just that I can't keep up with Papamps .......... what's more important - I can't keep up even with just 2% of kwayzee Papawittyness

Papa is evil.

Hahaha
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Old 3rd December 2016, 06:15 AM   #13
vallickad is offline vallickad  India
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Can't we do with a depletion mode mosfet?
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Old 3rd December 2016, 06:52 AM   #14
Soundhappy is offline Soundhappy  France
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@ Mr Pass

In follower V2 resitors help selfbiasing for unmatched part's
do they resistors other function in the same time ?
Example schade feedback on enhancement IRFP240 for triode like character ?
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Last edited by Soundhappy; 3rd December 2016 at 07:11 AM.
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Old 3rd December 2016, 07:52 AM   #15
2 picoDumbs is offline 2 picoDumbs  Australia
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Source follower not common source
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Old 3rd December 2016, 11:22 AM   #16
Attila I is offline Attila I  Germany
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maybe this combination could work?
http://www.mouser.com/ds/2/205/Viewer-707752.pdf
and
http://www.mouser.com/ds/2/205/Viewer-707752.pdf
they are as close (vgs-wise) as i could find at a quick search
cheers a.
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Old 3rd December 2016, 11:27 AM   #17
Zen Mod is offline Zen Mod  Serbia
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two same links/pdfs
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Old 3rd December 2016, 11:29 AM   #18
Attila I is offline Attila I  Germany
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sorry!!!
http://www.mouser.com/ds/2/205/DS100...5T)-238149.pdf
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Old 3rd December 2016, 03:16 PM   #19
Antoinel is offline Antoinel  United States
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Quote:
Originally Posted by soundhappy View Post
@ Mr Pass

In follower V2 resitors help selfbiasing for unmatched part's
do they resistors other function in the same time ?
Example schade feedback on enhancement IRFP240 for triode like character ?
Hello soundhappy. You made an interesting point. A follower using an N device which has a pentode-like characterisic [R085], and P- device which has a triode like characteristic; be it a Schaded FET or a SIT; say 2SJ28. What will the resultant subjective sound be due to mixing a pentode and a triode characteristics?
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Old 3rd December 2016, 03:47 PM   #20
EUVL is offline EUVL  Europe
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Quote:
Originally Posted by Nelson Pass View Post

...... It is a self-biasing push-pull output stage which has some interesting
characteristics, not the least of which is low temperature drift which allows
stable undegenerated operation.
The low temperature drift only occurs when the Id-tempco of the PMOS is smaller than that of the NJFET, correct ?

Am I right in saying that it will have more noise than e.g. a Source Follower using a matched pair of NJFETs ?


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Last edited by EUVL; 3rd December 2016 at 03:54 PM.
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