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My master thesis - switched amplifier

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Steven De Bock

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steven de bock xdsl

Hello,

I finished my master thesis. Therefore, I'd like to share my "extended abstract" on EDA board as some people might to review it. If any of you has some comments, feel free to share them with me.

My thesis is about a switched amplifier, using an asynchronous sigma-delta modulation to create the pulsed wave out of the analog input signal. A high voltage output stage is used to deliver the necessary power into a 100Ohm load.

My entire master thesis can be found **broken link removed**. I have to say that the thesis is in Dutch.

The "extended abstract" is in English and can be found beneath:
 

What's the motivation to using a switched amplifier?

Is it some sort of class D power amplifier driven by a sigma delta modulator?
 

Well, the ultimate goal in using the switched amplifier is to obtain a higher powerefficiency than the currently used class AB amplifiers in the xDSL central offices.

You can certainly describe this power amplifier as a class D power amplifier driven by an "asynchronous" sigma delta modulator. I explicitly wanted to mention "asynchronous" since no clocking is required for the sigma delta modulator.
 

what is the speed and resolution of ur sigma delta adc.
regrds
 

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