adaptive bias theory - 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 15th October 2006, 04:57 AM   #1
Leolabs is offline Leolabs  Malaysia
diyAudio Member
 
Leolabs's Avatar
 
Join Date: Dec 2004
Location: Bukit Mertajam
Send a message via MSN to Leolabs
Default adaptive bias theory

Read this and your opinion.
Attached Files
File Type: pdf the use of adaptive bias.pdf (29.2 KB, 306 views)
  Reply With Quote
Old 15th October 2006, 05:50 AM   #2
diyAudio Member
 
Jan Dupont's Avatar
 
Join Date: Apr 2003
Location: Copenhagen, Denmark
Send a message via MSN to Jan Dupont
Hi

I have discussed this subject for some time with some of the other members here, and we found that the information in that white paper contains to little information

However we all agree on, that it could be interesting to try to "copy" this bias circuit

So if anyone has a ML amp with adaptive bias, please lift the lit on it and help us
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com
  Reply With Quote
Old 15th October 2006, 07:18 AM   #3
johndiy is offline johndiy  Greece
Banned
 
Join Date: Aug 2006
put it in the bin
  Reply With Quote
Old 15th October 2006, 08:33 AM   #4
diyAudio Member
 
Join Date: Aug 2003
Location: Prague,Czech Republic
This circuit was developed by firm Sansui, not by ML. Look at J. Audio Eng Soc.,Vol. 29, No. 3, 1981 March. Author is Susumu Tanaka...
  Reply With Quote
Old 15th October 2006, 08:40 AM   #5
diyAudio Member
 
Jan Dupont's Avatar
 
Join Date: Apr 2003
Location: Copenhagen, Denmark
Send a message via MSN to Jan Dupont
Hi Pavel

You are right, but how does it look
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com
  Reply With Quote
Old 15th October 2006, 08:57 AM   #6
diyAudio Member
 
aparatusonitus's Avatar
 
Join Date: Jan 2004
Location: Split, Croatia
...like this www.pat2pdf.org/patents/pat4401951.pdf
__________________
Non mai abbastanza...
  Reply With Quote
Old 15th October 2006, 09:05 AM   #7
diyAudio Member
 
Jan Dupont's Avatar
 
Join Date: Apr 2003
Location: Copenhagen, Denmark
Send a message via MSN to Jan Dupont
Well

Has somebody build an diy amp using this ???
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com
  Reply With Quote
Old 16th October 2006, 02:03 AM   #8
Leolabs is offline Leolabs  Malaysia
diyAudio Member
 
Leolabs's Avatar
 
Join Date: Dec 2004
Location: Bukit Mertajam
Send a message via MSN to Leolabs
Now this is more detailed.
  Reply With Quote
Old 16th October 2006, 07:50 AM   #9
ppl is offline ppl  United States
diyAudio Member
 
ppl's Avatar
 
Join Date: Apr 2001
Location: Seattle, WA U.S.A.
I think this is what you are looking for see attached. I think our own MR. Pass is the Dynamic Biasing expert around hear.
Attached Images
File Type: gif tanaka-lapaz[1].gif (8.3 KB, 527 views)
  Reply With Quote
Old 16th October 2006, 06:34 PM   #10
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
These schemes are most similar to the "optical bias" circuit,
my patent #4,752,745 from 1988, where bias feedback is
taken from the Bases (or Gates) of the output devices.

  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
Changing grid leak bias preamp to cathode bias bereanbill Tubes / Valves 8 28th March 2009 05:26 PM
Stray hum pickup *preamp* cathode R-bias vs. battery bias & 12AU7vs.5687 awedio Tubes / Valves 2 19th April 2008 01:30 AM
Adaptive class A jane Tubes / Valves 4 19th March 2007 01:35 AM
Using PC's for adaptive equalization drewm1980 Digital Source 35 3rd January 2007 11:28 AM
Supressed bias amplifier, automatic variable bias system. destroyer X Solid State 2 20th September 2004 10:24 AM


New To Site? Need Help?

All times are GMT. The time now is 04:05 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