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In this paper, we adopt a hybrid modulation scheme for digital modulators of Class D amplifiers of power-critical digital hearing aids. The hybrid modulation scheme comprises the Delta-Sigma modulation (ΔΣM) scheme and the Pulse Width Modulation (PWM) scheme. The ΔΣM of the hybrid modulation scheme quantizes down the input data while the PWM generates 3-state output pulses corresponding to the quantized...