Filterless class-d

fzaad · 21st December 2010, 03:55 PM

Have you guys tried design proposed in Enhanced design of filterless class-D audio amplifier by Chun Wei Lin ; Bing-Shiun Hsieh ; Yu Cheng Lin ? It can be found in ieee xplore.

fzaad · 21st December 2010, 04:35 PM

I just realized that it's subscription site. Dataflow is pwm converter -> tda -> encoder -> dual H-bridges multilevel converter. It supposed to decrease emi because not so radical changes of levels in H-bridge.

newvirus2008 · 04:49 PM

I think it is a multilevel class D amplifier but multilevel obtained from bilevel PWM isnt it?

I think a better implementation can be Karsten Neilsen's PSCPWM amplifier.
http://www.icepower.bang-olufsen.com...ntion/4447.pdf

fzaad · 21st December 2010, 05:02 PM

PWM is like conventional class-d the time division adder convert (tda) it to binary code and is encoded and then send to multilevel converter (Dual H_Bridge).

fzaad · 29th December 2010, 10:27 PM

i took second look newvirus2008 recommendation and i start to think if i integrate pwm into the dsp. Any recommendations for gate driver and power bridge (at least 4 ch for stereo 2-way). Finally The big question how do i implement feedback?.

21st December 2010, 03:55 PM	#1
fzaad diyAudio Member Join Date: Nov 2006	Filterless class-d Have you guys tried design proposed in Enhanced design of filterless class-D audio amplifier by Chun Wei Lin ; Bing-Shiun Hsieh ; Yu Cheng Lin ? It can be found in ieee xplore.

21st December 2010, 04:40 PM	#3
newvirus2008 diyAudio Member Join Date: Jun 2008 Location: India	I think it is a multilevel class D amplifier but multilevel obtained from bilevel PWM isnt it? I think a better implementation can be Karsten Neilsen's PSCPWM amplifier. http://www.icepower.bang-olufsen.com...ntion/4447.pdf Last edited by newvirus2008; 21st December 2010 at 04:49 PM.

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21st December 2010, 04:35 PM	#2
fzaad diyAudio Member Join Date: Nov 2006	I just realized that it's subscription site. Dataflow is pwm converter -> tda -> encoder -> dual H-bridges multilevel converter. It supposed to decrease emi because not so radical changes of levels in H-bridge.

21st December 2010, 05:02 PM	#4
fzaad diyAudio Member Join Date: Nov 2006	PWM is like conventional class-d the time division adder convert (tda) it to binary code and is encoded and then send to multilevel converter (Dual H_Bridge).

29th December 2010, 10:27 PM	#5
fzaad diyAudio Member Join Date: Nov 2006	i took second look newvirus2008 recommendation and i start to think if i integrate pwm into the dsp. Any recommendations for gate driver and power bridge (at least 4 ch for stereo 2-way). Finally The big question how do i implement feedback?.

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