Super-complementary output stage - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 22nd April 2013, 11:49 AM   #1
diyAudio Member
 
Join Date: Apr 2013
Location: Sydney
Post Super-complementary output stage

Look at that. The circuit is more complementary than a conventional. Both legs have the same transistors -- both NPN and PNP.

Super complementary output

So in theory the gain of top and bottom is the same... plus it is two times higher than in a conventional Darlington. But will it work in reality?
  Reply With Quote
Old 22nd April 2013, 04:03 PM   #2
sregor is offline sregor  United States
diyAudio Member
 
Join Date: Jan 2006
Location: massachusetts
Looks like bryston type output. Check schematic on page 6 of 2b manual http://www.bryston.com/PDF/Manuals/2B_MANUAL.pdf .
__________________
Steve
  Reply With Quote
Old 22nd April 2013, 07:57 PM   #3
diyAudio Member
 
Join Date: Jul 2002
Location: ISRAEL
This is a much clearer example try here: http://www.bryston.com/PDF/Schematic...SCHEMATICS.pdf
And there are a few others who use similar topology..
  Reply With Quote
Old 23rd April 2013, 12:37 AM   #4
diyAudio Member
 
Join Date: Apr 2013
Location: Sydney
Quote:
Originally Posted by BenY View Post
This is a much clearer example try here: http://www.bryston.com/PDF/Schematic...SCHEMATICS.pdf
And there are a few others who use similar topology..
Thanks. So this topology can work in practice.
  Reply With Quote
Old 23rd April 2013, 06:28 AM   #5
diyAudio Member
 
Join Date: Mar 2004
Location: Krakow
but here is a real gem, on the bottom of the page, fig 6: Low distortion follower
from the description it is working circuit.
__________________
regards, Pawel
  Reply With Quote
Old 23rd April 2013, 06:38 AM   #6
diyAudio Member
 
Lazy Cat's Avatar
 
Join Date: Sep 2007
Quote:
Originally Posted by alexp0360 View Post
Thanks. So this topology can work in practice.
hahaha yes

Look to my signature SSA link below, from year 2000 using BIGBTs
__________________
First One VSSA
  Reply With Quote
Old 23rd April 2013, 07:05 AM   #7
diyAudio Member
 
Join Date: Mar 2004
Location: Krakow
I was writing about this:
Attached Images
File Type: jpg boost em fol pow audio amp.jpg (32.8 KB, 367 views)
__________________
regards, Pawel
  Reply With Quote
Old 23rd April 2013, 08:56 AM   #8
diyAudio Member
 
Join Date: Apr 2013
Location: Sydney
Quote:
Originally Posted by Lazy Cat View Post
hahaha yes

Look to my signature SSA link below, from year 2000 using BIGBTs
ESL5012 looks like a decent amplifier using this super-complementary output. But in reality, will the "super-complementary" follower work better than a conventional Darlindton or Sziklai? Is it any better than paralleling the same polarity per each leg transistors (with current sharing emitter resistors)?

My understanding is that for a deep-feedback design super-complementary stage does not give marked advantage. Not sure about crossover distortion. It is possible that N and P siblings in the same leg will not go into cut-off at the same time. So the switchover between top and bottom sides might be more "smeared". Whether it is good or bad -- I do not know.
  Reply With Quote
Old 23rd April 2013, 09:44 AM   #9
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
I thought about converting a quasi output stage to a "Bryston" style stage by adding a pair of transistors.
Until a Member pointed out that cross conduction may be a very big problem.

Bryston's designers could probably design out of the hole they dug, but I was not confident I had the skills to do likewise.
__________________
regards Andrew T.
  Reply With Quote
Old 23rd April 2013, 12:28 PM   #10
diyAudio Member
 
Join Date: Mar 2004
Location: Krakow
hi
I started to be suspicious about this follower
I even cannot set it up right in ltspice
Attached Images
File Type: png Picture1.png (48.8 KB, 293 views)
Attached Files
File Type: asc boos em fol pow aud amp.asc (3.5 KB, 5 views)
__________________
regards, Pawel
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Design Rules for a Push-Pull Quasi-Complementary output stage tiefbassuebertr Solid State 22 10th February 2014 08:57 AM
Quad 303 : Upgrade output stage to be fully complementary askbojesen Solid State 32 18th February 2012 05:12 PM
Quasi-complementary Output Stage question. Tequilataz Solid State 14 25th September 2009 01:40 PM
Aleph1 with complementary output stage LBHajdu Pass Labs 8 5th October 2005 05:37 AM


New To Site? Need Help?

All times are GMT. The time now is 10:49 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2