Research on switched audio amplifiers - 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 7th February 2006, 05:16 PM   #1
sovadk is offline sovadk  Denmark
diyAudio Member
 
sovadk's Avatar
 
Join Date: Sep 2004
Location: Kaspar Sinding Meyer @ DTU in Lyngby
Default Research on switched audio amplifiers

Hi

Iím going to write a special course in switched audio amplifiers here at DTU. My focus will be on selfoscillating designs and the issues associated with these.
Do any of you have some suggestions to what would be interesting to work on?
I would also like to know about any relevant articles that you know of.

I was thinking about outline containing these subjects:

Different buck based topologies and design (Hysteresis, UCD, Mueta, COM (B&O) etc.)
Frequency variation as function of modulation and proposed solutions.
Error sources: deadtime, comparator delay as function of modulation, nonlinear inductor.
Power comparator implementations. Discrete versions, IC versions.
Design and limitations of additional noise shaping. Effects of carrier feedback.
Print layout.
MOSFET selection, losses, dv/dt rating etc.

Thanks in advance
Kaspar S. Meyer
  Reply With Quote
Old 8th February 2006, 12:06 AM   #2
diyAudio Member
 
Join Date: Jan 2005
Location: Sonoma, California
Is this for a class you gonna teach? Icepower's Nielsen and many other engineers (and PhDs) from DTU have written so many papers on that subject, well maybe not self-oscillating type.

Why not use Putzeys's white paper and search the patent databases?
__________________
Koolkid
  Reply With Quote
Old 8th February 2006, 10:08 AM   #3
sovadk is offline sovadk  Denmark
diyAudio Member
 
sovadk's Avatar
 
Join Date: Sep 2004
Location: Kaspar Sinding Meyer @ DTU in Lyngby
I'm not going to teach since I'm still a student here
I have had a look at Putzeys's white paper. If we're talking about the same paper, there was three eferences. I've had a look at the "van der Hulst, Paul" reference are the other interesting?
  Reply With Quote
Old 8th February 2006, 11:59 PM   #4
diyAudio Member
 
Join Date: Jan 2005
Location: Sonoma, California
www.hypex.com has Putzeys's paper presented at recent AES convention.

Another patent to read is B&O's WO2004/047286

Then you'll get familiar with BS of patent language
__________________
Koolkid
  Reply With Quote
Old 9th February 2006, 06:57 AM   #5
diyAudio Member
 
Join Date: May 2002
Location: Switzerland
Talking of B&O: On their website you will find a few AES articles which by themselves have many references:

http://www.icepower.bang-olufsen.com/sw1062.asp

There is an interesting site (though not up-to-date anymore) comparing different class-d technologies.

www.class-d.org

Regards

Charles
  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
Audio Research D-90 rudy129 Tubes / Valves 4 11th June 2010 01:19 PM
Audio Research D 400 MK 1 Alex helge Solid State 1 21st May 2005 04:50 AM
Audio Research LS7 kirc Tubes / Valves 0 21st October 2004 01:07 PM
pro amplifiers vs. home audio amplifiers bonsai171 Solid State 26 25th February 2004 08:24 PM
Digital relay switched log pot emulation audio .WAV's. Brian Guralnick Pass Labs 1 8th October 2003 05:39 PM


New To Site? Need Help?

All times are GMT. The time now is 06:15 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