An Oversampled Digital PWM Linearization Technique for Digital-to-Analog Conversion
Jin‐Woo Jung, Malcolm J. Hawksford · IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications · 2004
An algorithmic-based linearization process for uniformly sampled digital pulsewidth modulation (PWM) is described. It is shown that linearization of the intrinsic distortion resulting in uniformly sampled PWM can be achieved by using a fractional delay digital filter embedded within a noise shaping re-quantizer. A technique termed direct PWM mapping is proposed as a pre-compensation filter scheme for applications in high-resolution digital-to-analog conversion.