Sturdy MASH D-S modulator

Abstract

AnewD-S modulator is proposed. Its operation is similar to that of a multi-stage noise-shaping structure but requires no digital noise cancellation filters. Thus, the need for matching required between analogue and digital filters is eliminated. Simulation results and mathematical analysis demonstrate the effectiveness of this structure. Introduction: With delta-sigma (D-S) modulators (DSMs) heading towards low-power high-speed applications with low oversampling ratio (OSR), the employing of higher-order noise shaping is necessary to achieve the desired signal-to-noise-and-distortion ratio (SNDR). The single-loop high-order DSM can provide the required SNDR wit