Due to the nonlinearity of the digital pulse width modulation( PWM) generators in digital class D power amplifiers,this paper proposed an improved nonlinear error precorrection method for digital PWM generators. The proposed method took advantage of the characteristics of ∑-Δ modulators to modify the correction factor expression of the original method. This method not only can correct the nonlinear error produced by the digital PWM generator,but also can solve the original method's problem that the energy o...