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Class D Switching Power Amplifiers and Power D/A conversion

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Old 5th December 2009, 11:52 AM   #1
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Join Date: May 2009
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Dear friends
I am developing an amplifier for SUB 500wrms Fullbridge Filterless.
the open loop amplifcador works well but having scraped the Sounds and Audio, All the party of power is set everything perfect.
I'm switching to 30Khz.
My doubt is what would be the best way to Feedback? remembering that I have no filter so I have to reload the audio making a prediction via a square wave output.
I tried in various ways but always to put the feedback, the ampliicador loses impulse response .. so the bass is weak and is not firm.
in other types of feedback It modulating the PWM without generating an audio carrier at the exit without audio and as I do not filter can not use this way.
Could you help me?

Regards,
Cleber
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Old 5th December 2009, 04:36 PM   #2
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Switching Frequency : 30Khz
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