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Old 27th October 2009, 06:27 AM   #21
Nevod is offline Nevod  Russian Federation
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tiefbassuebertr
I think that when using NMOS only, one can pull out all the tube topologies out of the box.
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Old 27th October 2009, 02:24 PM   #22
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Originally Posted by Nevod View Post
tiefbassuebertr
I think that when using NMOS only, one can pull out all the tube topologies out of the box.
This could be possible, but I have never tested.

Basicly it would be easy find out by the circlotron topology (= CSPP resp. PPP) without transformer (i. e. OTL)

If you have an OTL circlotron tube power amp GM-20 (Graaf) and a finished MOSFET circlotron diy project at the same time, you can comparable both of them and tell about the results.

I have heard both of them, but unfortunately not at the same time

here a URL about MOSFET CSPP
http://www.hinocatv.ne.jp/~s_suzuki/...OS/UHC-MOS.htm
and two jpg's and a schematic about the GM-20:
Attached Images
File Type: jpg GM 20 unten.jpg (88.8 KB, 1812 views)
File Type: jpg GraafGM20.jpg (57.1 KB, 1773 views)
Attached Files
File Type: pdf C_tmp_Graaf GM20_ckt.pdf (29.7 KB, 361 views)

Last edited by tiefbassuebertr; 27th October 2009 at 02:27 PM.
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Old 2nd November 2009, 05:20 PM   #23
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Originally Posted by Workhorse View Post
Phase splitter is best for the N-Channel Mosfet Drive topology.
Here are description a special quasi compl. version include a distortion removal circuit - of the japanese URL
Distortion removal circuit
and the automatic translation in English
Google Übersetzer
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Old 9th November 2009, 03:34 PM   #24
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Originally Posted by tiefbassuebertr View Post
Here are description a special quasi compl. version include a distortion removal circuit - of the japanese URL
Distortion removal circuit
and the automatic translation in English
Google ‹bersetzer
no comments to this topology from Japan?
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Old 4th December 2009, 05:21 PM   #25
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Default It's cheap, it's N, it's dirty, it's.... The CIRCLOMOS!!!

another approach in this context
It's cheap, it's N, it's dirty, it's.... The CIRCLOMOS!!!
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Old 4th December 2009, 06:34 PM   #26
wahab is offline wahab  Algeria
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can i suggest a serial dual differential ? it s balanced as
the phase spliting is naturally present in this topology...
i would go this way if i had only one kind of power devices...
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Old 13th April 2010, 01:54 PM   #27
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Originally Posted by wahab View Post
can i suggest a serial dual differential ? it s balanced as
the phase spliting is naturally present in this topology...
i would go this way if i had only one kind of power devices...
Then you have an circlotron input stage - so I think (CSPP). Check out this thread:
URL collection of Totem Pole and CSPP (Single Ended related) Solid State Output Stage

now there are additional topologies here on diyaudio, where used only N-Channel MOSFETs resp. only NPN BjTs: in the output power stage:
1) Circlomos from Elvee
It's cheap, it's N, it's dirty, it's.... The CIRCLOMOS!!!
2) Super-Pair Buffer from Linuxguru
Low-distortion Super-pair Buffer simulation schematics
3) Kenpeter's follower - three in one (very special) go to post #47 about
four transistor emitter follower (diamond buffer) as power output stage?
4) Class-B without crossover-distortion
Class B w/o crossover distortion (1975)

Number 2, 3 and 4 I haven't investigate, but it looks very interesting. If the author have found a method for reliability stabilizing of the idle current through the output for number 1, we have a very fine power amp topology.

Last edited by tiefbassuebertr; 13th April 2010 at 02:11 PM.
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Old 3rd May 2010, 09:20 AM   #28
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I have the schematics of the Cabasses AM/AS1000 amplifiers which show class G output stage topology where the inner devices are N-channel MOS-FETs IRFP240, whereas the outer devices are complementary MOS-FETs IRFP9150/IRFP150, driven by a differential amplifier.
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Old 7th December 2010, 12:11 PM   #29
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look this

Hybrid Amplifier by Andrea Ciuffoli
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Old 7th December 2010, 01:14 PM   #30
Bigun is offline Bigun  Canada
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Originally Posted by audiodesign View Post
did you look at the schematic ? - the output is shorted to the -ve rail.
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