Class D amps are simple – just take an input, and use that to modulate a square wave with PWM. Send this PWM signal to a MOSFET or something, and you have the simplest class D amp in existence.

There appeared to be a whole class of ... might be to use a MOSFET source follower as a buffer. It’s one of those projects that I might find myself returning to with this amplifier.

Silva Piovani, Daniel E. Schneider, Marcio Cherem and Galup-Montoro, Carlos 2010. Design of a low power CMOS class-D amplifier for hearing aids. p. 1.

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Devialet's Astra integrated amp totes 2x300 watts of power and wants to 'redefine the boundaries of hi-res audio fidelity'.

Class D audio amplifier chips are a type of amplifier that uses switching technology to convert an input audio signal into a high-frequency pulse-width modulated (PWM) signal. These amplifiers are ...

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A transresistance amplifier converts an input of current to an output of voltage. It is also called a voltage to current converter or V to I converter. It is called transresistance because the ...

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