High Dc Offset Issues - diyAudio
Go Back   Home > Forums > Amplifiers > Class D
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Class D Switching Power Amplifiers and Power D/A conversion

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 3rd March 2009, 02:56 AM   #1
diyAudio Member
Join Date: Jan 2007
Location: Minnesota
Default High Dc Offset Issues

Well I have built a 41 hz Amp 6 basic and to my surprise it sounds and works great. Except for one channel has a dc offset of 102mv give or take. The other channel is 15mv. I have reflown all the solders and double checked everything but I cannot pinpoint why the hell it is so damn high. Does anyone have any advice on what could be the problem? Or of a solution that would work out. I know there is a trimmer circuit that can be built, how about a cap across the outputs. Not sure if that would block direct current from getting to the speakers. Any advice would be much appreciated. I have done a few searches but I haven't seen many issues with this amp from anyone.
  Reply With Quote
Old 3rd March 2009, 04:23 AM   #2
diyAudio Member
Join Date: Jan 2007
Location: Taipei
102mv is still in the spec of max offset voltage of Tripath TA2020, which is 150mv.
I built several amp6 and some of them have more than 100mv offset voltage in one of two channel.
However, no one has caused any trouble and they all play nicely.
If you want to have zero output voltage offset, 41hz amp4, amp11... etc. are what you looking for.
  Reply With Quote
Old 3rd March 2009, 01:49 PM   #3
diyAudio Member
Join Date: Jan 2007
Location: Minnesota
I wont worry about it then. It sounds great! Much improved over the Sonic Impact.
  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
High DC Offset in one channel hifileslie Solid State 0 28th April 2006 02:53 PM
High offset drift darkfenriz Solid State 11 4th February 2006 09:35 AM
Help! High Offset on Tjoeb 99 blip1882 Digital Source 2 16th December 2005 12:26 AM
AMP-3 DC offset (high) Nuuk Class D 14 5th August 2005 08:56 PM
High DC-Offset - Why? rampage101 Chip Amps 1 30th April 2004 08:16 AM

New To Site? Need Help?

All times are GMT. The time now is 05:57 AM.

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