Self oscillating class d with BD modulation, it's possible! - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

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
Reply
 
Thread Tools Search this Thread
Old 28th March 2013, 01:29 PM   #11
Banned
 
Join Date: Jan 2005
Byt they still suffer the unacceptable switching frequency drop as modulation goes up.
  Reply With Quote
Old 28th March 2013, 03:31 PM   #12
gmarsh is offline gmarsh  Canada
diyAudio Member
 
gmarsh's Avatar
 
Join Date: Apr 2004
Location: Halifax, NS, Canada
Quote:
Originally Posted by Tekko View Post
Byt they still suffer the unacceptable switching frequency drop as modulation goes up.
One could argue that your constant frequency amplifier suffers unacceptably short on/off times at higher modulation, leading to excessive power dissipation
  Reply With Quote
Old 28th March 2013, 03:46 PM   #13
Banned
 
Join Date: Jan 2005
Rather that than a 4-8x reduction in switching frequency near full modulation.
  Reply With Quote
Old 28th March 2013, 06:32 PM   #14
diyAudio Member
 
Workhorse's Avatar
 
Join Date: Dec 2004
Tekko what is the benefit of fixed frequency at full modulation .....
  Reply With Quote
Old 28th March 2013, 11:09 PM   #15
gmarsh is offline gmarsh  Canada
diyAudio Member
 
gmarsh's Avatar
 
Join Date: Apr 2004
Location: Halifax, NS, Canada
Quote:
Originally Posted by Tekko View Post
Rather that than a 4-8x reduction in switching frequency near full modulation.
If you're close enough to the rails to make your switching frequency drop 4-8 times, that's an overdriven amp - not a fundamental problem with the amplifier architecture. Put more volts on the rails and you're good to go.
  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
AD Vs BD Modulation in Class-D Workhorse Class D 87 27th October 2012 07:33 AM
Improved class BD lumanauw Class D 8 10th April 2012 06:21 AM
How many modulation methods in Class D amplifier ? xuhaoz Class D 20 5th December 2006 05:15 AM
Class D Modulation Scheme pokka Class D 7 15th December 2004 08:33 PM
new class D modulation method? sfx Class D 12 6th October 2004 08:02 AM


New To Site? Need Help?

All times are GMT. The time now is 07:06 PM.


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