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Old 27th June 2009, 06:53 AM   #1
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Default URL collection of Single Ended Solid State Output Stages

After read the article "Single Ended Class A" from Nelson Pass about www.firstwatt.com/downloads/seclassa.pdf and after simulation and test of a wide range of different circuit designs I hate the so called "True Complementary" circuit designs for output power stage, because the true complementary power transistor pair is for me a mythos resp. a tall story. The perfect symmetric character exist in the mind of most well-known famous designers so as on the schematic diagrams, but not in real life; both by BjTs and MOSFETs. Nevertheless - unfortunately most of the audio amplifier designs are make in this kind (or I find designs with output tubes).
Therefore the follow URL collection of all amplifier output single ended solid state designs. I have found all listed URLs below on the web in the last years.

If URL already death, please use http://www.archive.org/web/web.php and copy this death link about right click.You get a chronology overvview. At second step you choise the wanted date of the archived webstite. For example:
www.passlabs.com - copy in http://www.archive.org/web/web.php - click on "Apr.06.1997" and you see the website from "Daddy Pass" in the Aleph aera 12 years ago.
(http://web.archive.org/web/199704061...m/products.htm)

I have splitting the "Single Ended" Versions in "Power Follower"- buffer output stages and "Common Emitter" gain output stages. Versions with high idle current (> 3A) and low output power (arround 5W) especially for high quality tweeter drive (e. g. SA8535 from Stage Accompany) in bi-amping systems, I found nothing.

I hope, for some members this list offer a good overview. It is very hard to find such overview on other places in the web, because the most designs of amplifiers - as mentioned earlier - based of complementary transistor pairs.
If not, I have to do in most cases with tube (valve) output power stages.

Perhaps some members know about additional interesting URLs in this case.
Please excuse my not perfect english - I work with the language tools by google.

Single Ended Power Follower (Power-Buffer, Power BUF), non inverting Gain <1
http://www.tubecad.com/2006/06/blog0067.htm (Buffers and more buffers)
http://www.tubecad.com/articles_2002...ers/page2.html (basics)
http://www.tubecad.com/2007/11/blog0125.htm (basics)
http://home.zonnet.nl/tschrama/owndesign.html (Power Follower, MJ magazine 5W)
http://www.audiodesignguide.com/PowerFollower/ Andrea Ciuffoli
http://sound.westhost.com/project83.htm (MOSFET POWER FOLLOWER, Pavel Macura)
http://web.archive.org/web/200612241...ollower_e.html (Macura)
http://img233.imageshack.us/my.php?image=p83f3gb0.gif (Power-Sziklai, Bunta/Macura)
http://www.diyaudio.com/forums/attac...amp=1216269919 (Bunta/Macura)
http://royalsound.sweb.cz/FOTKY/index.htm (Power-Sziklai, Bunta/Macura)
Power follower class A Mosfet DC coupled. some buffer design's
http://home.c2i.net/semfielec/Loweroutputimpedance.htm Lower output impedance in single-ended output stages
Bored...2n3055e amp? (OP-AMP+ High Power Buffers/Sourcefolger)
http://www.tubecad.com/articles_2002...ers/page2.html (High Power Buffers/Sourcefolger)
http://www.audiodesignguide.com/PowerFollower/ (the Power Follower, Andrea Ciuffoli)
http://sound.westhost.com/project10.htm (Gain Stage + SE-Sziklai-BUF)
http://home.c2i.net/semfielec/mosfetamp.htm (yet another SE amp, source follower in bridge mode.)
http://www.tubecad.com/2004/blog0023.htm (Taylor power follower)
http://www.tubecad.com/2005/January/blog0034.htm Low Dissipation Single Ended Class A?
http://www.ne.jp/asahi/evo/amp/Dnfb/edc.htm (Sourcefolger with remover for residual distortion)
http://www.vt52.com/diy/diypage/aren/fet/aren.html (Inverter HEF4069 + 2SK135)
single ended mosfet amp (Cascode TIP142/IRF150)
http://www.diyaudio.com/forums/attac...amp=1077308873 (schem. TIP142/IRF150)
http://www.linearaudio.de/scratch/p...er-casc-hyb.pdf (Cascode TIP142/IRF150)
www.firstwatt.com/downloads/susy.pdf (X-Series, Super Symmetric Amplification)
http://www.patentstorm.us/patents/5376899.html (Nelson Pass, folded casc.+ power buffer, bridged mode)
http://translate.google.de/translate...hl=de&ie=UTF-8 (Ultra Symmetry)
request for pass x series's schematics (schem inquiry from China for clone "X-Series")
http://www.audiodesignguide.com/tra/...r_follower.jpg (dynamic current source)
Design: Reinhard Hoffmann Audiosystems, Wiembecker Str.1
32657 Lemgo / Germany, Fax & Fon ++49 5261 87586

Single Ended Power Amplifier (Common Source/Common Emitter), inverting Gain >1
www.passdiy.com/pdf/zenamp.pdf
http://www.patentstorm.us/patents/5710522.html Aleph current source
http://www.kk-pcb.com/amps.html (schematic overview about all Aleph versions)
http://www.kk-pcb.com/zen-xa.html (ZEN-XA)
http://www.kk-pcb.com/zen-x.html (ZEM X)
http://www.buscher-endstufen.de/down...spekt_se25.pdf (Gain Stage + Common Source, active current source similar but not exactly to the Pass-Aleph)
http://www.buscher-endstufen.de/elem...er_se50_01.jpg (finish SE-50 devices)
http://www.hornlautsprecher.de/electonix_buscher.htm (gallerie)
http://www.audioxpress.com/magsdirx/...tipton2730.pdf (like Buscher, but BjT by output)
http://www.welbornelabs.com/catom.htm (similar Buscher, but input tubes)
http://www.rstaudio.de/ (Zen/Aleph diy)
http://diyaudioprojects.com/Solid/ZCA/ZCA.htm (SE-POWER-AMP with resistor instead current source)
http://www.tubecad.com/2004/blog0001.htm Letter from Enro Borbely, Rudolf Lender's circuit
http://www.tubecad.com/march2001/page25.html Rudolf Lender's circuit + Power Stage
http://www.b-kainka.de/bastel82.htm (SE Power Amp, from B. Kainka, Elektor, Germany)
http://img299.imageshack.us/img299/6...ntaktaends.jpg (historical Siemens-design)
http://www.bonavolta.ch/hobby/en/audio/2sk135se.htm (Nemesis, Power Amp + transf.)
http://www.linearaudio.nl/Nemesis/nemesis%20cct.bmp (Nemesis, Power Amp + transf.)
http://www.linearaudio.nl/nemesis-1.htm (Nemesis, Power Amp + Transf.)
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