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Class D amplifiers are routinely employed as audio amplifiers due to their high power efficiency. Total Harmonic Distortion (THD) is one of the most important parameters to qualify and quantify their performance. In this paper, THD of a commonly used Bridge-Tied-Load (BTL) Class D amplifier is investigated, including the derivation of the analytical expression for the THD of the BTL Class D amplifier...
Conventional analog Pulse-Width-Modulation (PWM) Class D Amplifiers (CDAs) require analog input signals that are typically provided by a Digital-to-Analog Converter (DAC). A PWM-in PWM-out CDA, on the contrary, is able to receive digital PWM signals as its input signals, hence not requiring said DAC as the ‘interface’ to digital signal processing circuits. In this paper, we analytically investigate...
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