Research on switched audio amplifiers

sovadk · 7th February 2006, 05:16 PM

Hi

I’m 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

koolkid731 · 8th February 2006, 12:06 AM

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?

sovadk · 8th February 2006, 10:08 AM

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?

koolkid731 · 8th February 2006, 11:59 PM

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

phase_accurate · 9th February 2006, 06:57 AM

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

7th February 2006, 05:16 PM	#1
sovadk diyAudio Member Join Date: Sep 2004 Location: Kaspar Sinding Meyer @ DTU in Lyngby	Research on switched audio amplifiers Hi I’m 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

8th February 2006, 12:06 AM	#2
koolkid731 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

8th February 2006, 11:59 PM	#4
koolkid731 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

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

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


	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

8th February 2006, 10:08 AM	#3
sovadk diyAudio Member 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?

9th February 2006, 06:57 AM	#5
phase_accurate 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

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read