Audio (Lateral) MOSFET's for Class AB - Overview, P-Spice URL's - Page 3 - 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 30th December 2011, 12:15 AM   #21
ontoaba is offline ontoaba  Indonesia
diyAudio Member
 
ontoaba's Avatar
 
Join Date: Nov 2009
Location: Kudus, Malang, Dieng
I usually using low bias with cross management, don't know why I am still use it when sometimes THD figures already low without it. But may be from listening test it has significant effect, so I keep using it. Error correction is also very useful.
  Reply With Quote
Old 30th December 2011, 03:08 AM   #22
ontoaba is offline ontoaba  Indonesia
diyAudio Member
 
ontoaba's Avatar
 
Join Date: Nov 2009
Location: Kudus, Malang, Dieng
Quote:
Originally Posted by Bob Cordell View Post
It is always interesting to see approaches to achieving low distortion with low quiescent bias currents in class AB designs, if that is what you are referring to. Particularly with MOSFETs, transconductance droop at lower bias currents can be a source of distortion. That was the main reason that I introduced Error Correction to vertical MOSFET power amplifiers.

Cheers,
Bob
Yes, true, error correction is useful to cancel crossover error that NFB could not reject it most in 5kHz and up, and normally laterals also still need around 250mA bias to get low crossover error.
Also what peavey, I also can't found it with google, I hope anyone could show them. I don't like that spiky crossover error too. I think many people agree we doesn't like that spikes.


I am currently increasing my mosfet bias at HF operation, ofcourse not low bias anymore at high difficulty operation (waste power), but it has low bias normally 10-30mA at idle and normal operation. I still haven't other solution than this for long time.
I post old version here:
QUASI is not that bad, really, (I post some proof here).
This picture help to show how it work, but I really sorry I am not sharing schematic for now. I can only share on how it work. Picture is showing output stage only without global NFB.
Attached Images
File Type: png XM4 Id test.PNG (13.0 KB, 707 views)
  Reply With Quote
Old 2nd May 2012, 07:19 PM   #23
diyAudio Member
 
Join Date: May 2008
Location: Vi
Somebody know how to get ACD101NDD lateral mosfet?
  Reply With Quote
Old 3rd May 2012, 10:00 AM   #24
AndrewT is online now AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Have been reading any of the posts/reports re. the loss of the sole production facility due to natural disaster?
__________________
regards Andrew T.
  Reply With Quote
Old 3rd May 2012, 10:33 AM   #25
diyAudio Member
 
Join Date: May 2008
Location: Vi
No, I don't know that Proaudio factory is the same of Toshiba (fos example) factory.

So I have possibility to get one ACD101NDD? I have a final stage with 11 pair of mosfet, only one n-nos is short so I hope that I can substitute only this one, 11 pair of this mosfet is not cheap.
  Reply With Quote
Old 3rd May 2012, 11:11 AM   #26
AndrewT is online now AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
As far as I know Toshiba don't make or sell any Lateral Power mosFETs.
__________________
regards Andrew T.
  Reply With Quote
Old 3rd May 2012, 12:36 PM   #27
diyAudio Member
 
Join Date: May 2008
Location: Vi
Thank you very much, now that I know that I'm very happy. You was very usefull.
  Reply With Quote
Old 3rd May 2012, 12:54 PM   #28
diyAudio Member
 
Join Date: Mar 2007
Location: Oxfordshire
Default Exicon

Do you guys use Exicon FET's

Lateral Mosfet
  Reply With Quote
Old 3rd May 2012, 01:06 PM   #29
diyAudio Member
 
Join Date: May 2008
Location: Vi
But if I change type of mosfet I have to replace all 22 transistor and it is very expensive.
The ACD101NDD is a 24A driver.
  Reply With Quote
Old 3rd May 2012, 01:30 PM   #30
Banned
 
Join Date: Jan 2005
Last time i found a genuine legit datashhet for the ACD100NDD, it was a 16A part, dual die version of the ACD100NSD which is rated to 8A.

THe "SD and "DD" stand for "single Die" and "Dual Die"

The datasheets supplied by class-d.com are incorrect.
  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
Spice models Exicon MOSFET's TS Solid State 4 12th February 2012 01:00 PM
Class AB, Class AB Non-Switching, Class AB Soft Non-Switching steph_tsf Solid State 4 15th March 2010 03:39 PM
Looking for lateral mosfet spice models ojg Solid State 3 15th November 2003 11:56 PM
JLH Class-A in a with MOSFET's tschrama Solid State 3 10th February 2002 03:23 PM


New To Site? Need Help?

All times are GMT. The time now is 08:59 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