Power supply oscillation and Class D? - 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 27th August 2011, 07:38 PM   #1
Join Date: Jun 2011
Default Power supply oscillation and Class D?


Supposing an SMPS that supplies a Class D amplifier is poorly designed and has a feedback loop problem, manifesting itself as a 3KHz sine wave oscillation (peak to peak = 10V) imposed on its v(out).

Could a Class D amplifier filter out the power supply oscillation and stop it from ruining the music sound.?
  Reply With Quote
Old 27th August 2011, 08:18 PM   #2
Pafi is offline Pafi  Hungary
diyAudio Member
Join Date: May 2004
Location: Budapest
Not perfectly. And avoiding PSU oscillation is simplier than building a very tolerant amp.
  Reply With Quote
Old 27th August 2011, 08:37 PM   #3
diyAudio Member
nigelwright7557's Avatar
Join Date: Apr 2008
Location: Carlisle, England
What smoothing capacitors do you have on the output ?
What is the switching frequency of the SMPS?
Murton-Pike Systems PCBCAD51 pcb design software. http://www.murtonpikesystems.co.uk
  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
Class D Power Supply??? Co_Driver Class D 19 17th December 2010 01:05 PM
Class D: power supply regulated or not? matherp Power Supplies 2 27th October 2009 12:16 AM
Power Supply/Class D maverick_123 Power Supplies 3 30th November 2007 09:45 PM
Class D Power Supply kuda Class D 7 12th May 2006 07:58 AM

New To Site? Need Help?

All times are GMT. The time now is 03:05 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