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Class D Switching Power Amplifiers and Power D/A conversion

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Old 12th January 2006, 10:31 PM   #1
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Default Yet another class-TD

Any comments on this site?

Improved class D

I will re-read it tomorrow and maybe write something quasi-intelligent about it
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Old 13th January 2006, 12:43 AM   #2
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My only question is... who was first?

http://www.bashaudio.com/technologies.htm
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Old 13th January 2006, 12:53 AM   #3
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The so-called class-TD has the disadvantage of double component count, one set for tracking SPMS, and another for class AB with its cross-over distortion and biasing that must track transistor temperature.

Then they work on the assumption of resistive load. A real load, inductive or capacitive will give them some heat dissipation problem, plus power supply pumping.

They're behind the time.
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Old 13th January 2006, 01:06 AM   #4
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I've seen something similar to this before...

To me it looks like a kind of Class-H amplifier where the rail tracking is actually done by a class-D amplifier that acts as a power supply. Because class-D amplifiers can be set to high efficiency (via a low switching frequency), the class-D amp looks like a "smart" power supply with very low losses.

==> Does anyone know other ways to implement a smart power supply that can track the audio signal on the output? This is the only way I know of...
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Old 13th January 2006, 06:05 AM   #5
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==> Does anyone know other ways to implement a smart power supply that can track the audio signal on the output? This is the only way I know of... [/B][/QUOTE]

It's best to use the such as smart power supply to supply audio power output. It's called class-D, lol
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