Complementary vs NPN / NPN - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 11th February 2008, 03:06 PM   #1
toptip is offline toptip  United States
diyAudio Member
Join Date: Dec 2004
Location: New York City
Default Complementary vs NPN / NPN

Some time during 1972 - 1977 nearly all amps went from having NPN / NPN output stages (like 2x 2N3055s) to PNP / NPN complementary configuration. I assume this had a lot to do with availability of new, high power PNP transistors (like 2N2955) but what are the benefits of this newer set up? I presume Popular Electronics and similar magazines ran articles on this subject but I have been unable to find any.

I will appreciate any insight on this matter!
  Reply With Quote
Old 11th February 2008, 03:31 PM   #2
diyAudio Member
Join Date: Sep 2007
Send a message via Yahoo to linuxguru
When PNP devices with characteristics similar to NPN power devices became available, it was possible to build complementary symmetry push-pull output stages - both the devices could be operated as emitter-followers in Class-B (the most common topology) or both could be operated common-emitter with drivers of the opposite polarity (CFP/Sziklai). In either case, symmetric operation helped to bring certain kinds of distortion under control, and also simplified the driver stage topology in certain cases.
  Reply With Quote


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
Complementary V-FET's other than IRF's??? Ultima Thule Parts 36 30th June 2014 07:03 PM
Yet another complementary amp phase_accurate Solid State 3 11th May 2011 07:30 AM
complementary zen v5 input Z? nobody special Pass Labs 5 19th May 2006 06:00 PM
Complementary med pwr transistors? jan.didden Parts 22 16th June 2004 08:18 AM
Zen v5 non-complementary Stefano Pass Labs 15 10th August 2003 05:09 PM

New To Site? Need Help?

All times are GMT. The time now is 08:16 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2