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Switching Amplifier (Class D) Basics | Audioholics
https://www.audioholics.com/audio-amplifier/switching-amplifier-class-d-basics
In a switching audio amplifier, the output signal is a low-pass filtered version of the high-powered PWM voltage produced by a switching …
IC design of Switching Power Stages for Audio Power ...
https://orbit.dtu.dk/files/4712497/NyboeThesis_rev2.pdf
IC design of Switching Power Stages for Audio Power Amplification Page 7 The analyses of power losses and device stress have significant relevance for two-switch Buck power supplies also. Class D amplifier output stages can be monolithic, or discrete transistors can be used for output switches.
Practical power amplifier stages and block diagram. …
https://www.circuitstoday.com/practical-power-amplifier-stages-and-block-diagram
Circuit diagram of a three stage practical audio power amplifier is shown in the figure below. Small signal transistor Q1 and its associated components form the voltage amplification stage. R1 and R2 are biasing resistors of Q1. C4 is the input coupling capacitor which blocks DC components from the input signal.
Audio Myth - "Switching Power Supplies are Noisy ...
https://benchmarkmedia.com/blogs/application_notes/152143111-audio-myth-switching-power-supplies-are-noisy
Switching Supply in the AHB2 Power Amplifier. The AHB2 is a linear power amplifier with switch-mode power supplies. To the best of our knowledge, it has the highest SNR of any audio power amplifier. The A-weighted SNR is 132 dB in stereo mode and 135 dB in mono mode. This is 15 to 30 dB better than most of the best power amplifiers.
Designing Practical High Performance Class D Audio …
http://www.irf.com/product-info/audio/classdtutorial606.pdf
• IRF6665 Digital Audio MOSFET combines the latest IR medium voltage trench silicon with the advanced DirectFET® package • Key parameters, such as R DS(on), Q g, Q sw, and Q rr are optimized for mid-power Class-D audio amplifier applications • IRF6665, has all the characteristics to be the best power switch for mid-power amplifiers!!
EETimes - Audio amplifier power supply design - Part 1 ...
https://www.eetimes.com/audio-amplifier-power-supply-design-part-1-power-supply-types-transformer-considerations/
Part 1 of an excerpt from the "Audio Power Amplifier Design Handbook", 5th Edition, looks at advantages and disadvantages of different power supply technologies as well as the design considerations involved in choosing and evaluating a mains transformer.
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