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A True One-Bit Power D/A Converter

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A method is presented to convert 1-bit digital audio signals into an analogue signal with sufficient current and voltage to drive loudspeakers. For this goal a novel non-PWM class D power stage is constructed that performs this function with very low distortion and very high efficiency, without the use of feedback or other analogue processing. Results of the prototype development are detailed.

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AES - Audio Engineering Society