I'm looking for a class D amplifier scheme that is a self-oscillating model, that uses an operational amplifier ... but I need a model that uses only N channel mosfet on the output. can anybody help me? I thank you all.
Read more in this interview: PURIFI Audio and the Audiophile Style reader's Q&A with Lars Risbo & Bruno Putzeys
UcD class D amplifier based on this>> Simple Self-Oscillating Class D Amplifier with Full Output Filter Control, AES, May 2005, Bruno Putzeys: (PDF) Simple Self-Oscillating Class D Amplifier with Full Output Filter Control
Putzeys, Bruno, Globally Modulated Self-Oscillating Amplifier with Improved Linearity, Audio Engineering Society Conference: 37th International Conference: Class D Audio Amplification, Aug 2009: https://www.hypex.nl/img/upload/doc/an_wp/WP_Globally_modulated_self-oscillating_amplifier.pdf
Here is another, also based on the UcD, different implementation....
UcD class D amplifier based on this>> Simple Self-Oscillating Class D Amplifier with Full Output Filter Control, AES, May 2005, Bruno Putzeys: (PDF) Simple Self-Oscillating Class D Amplifier with Full Output Filter Control
Putzeys, Bruno, Globally Modulated Self-Oscillating Amplifier with Improved Linearity, Audio Engineering Society Conference: 37th International Conference: Class D Audio Amplification, Aug 2009: https://www.hypex.nl/img/upload/doc/an_wp/WP_Globally_modulated_self-oscillating_amplifier.pdf
Here is another, also based on the UcD, different implementation....
Thank you for your personal help, the content shared by you will help me, but I'm still looking for a more simplified model that uses an operational amplifier at the entrance like TL074 or 072 to do the switching
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The TL072/74 is an ancient op amp. The TI OPA1642/1644 SoundPLUS High-Performance, JFET-Input Audio OpAmp may be more interesting: https://www.ti.com/product/OPA1644
Additional info on that IRAUDAMP1 design here....IR Class D Audio Amplifier Design: https://www.irf.com/product-info/audio/classdtutorial.pdf
More Infineon/IR class D designs....
IRAUDAMP23, Evaluation board featuring IRS2452AM audio IC: IRAUDAMP23 - Infineon Technologies
EVAL_AUDAMP24: EVAL_AUDAMP24 - Infineon Technologies
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Yes, and still suitable for for performing mathematical integration. What is the aim of an upgrade request?
If the distortion level and performance of the older design works fine for you & it is still cheap enough, continue on. As an Analog computer, the older op amp should work fine.
The newer op amp designs may have better audio fidelity and lower distortion.
Lower noise and higher linearity. Higher GBW and SR help move deal with switching waveform on feedback.
Lower noise and higher linearity. Higher GBW and SR help deal with switching waveform on feedback.
If you have your heart set on using the TLC074/72 (3MHz GBWP) op amp as a modulator comparator, this IR reference design uses the TLC081 (10MHz GBWP) which is a faster op amp than the TL071/2/4.
Reference Design - IRAUDAMP4A
On the above webpage need to scroll down to >>>> Reference Design >>>>>>Reference Design - IRAUDAMP4A for the PDF file link
Reference Design - IRAUDAMP4A
On the above webpage need to scroll down to >>>> Reference Design >>>>>>Reference Design - IRAUDAMP4A for the PDF file link
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