Hardware Reduction of MASH Delta-Sigma Modulator Based on Partially Folded Architecture

This brief presents a new multistage noise-shaping (MASH) structure that has less hardware by applying partially folded architecture. A folded MASH architecture that exploits adders in half is introduced, and the proposed architecture combines the folded MASH architecture and the conventional MASH architecture. The noise power spectrum of the proposed architecture is mathematically analyzed and the noise-shaping capability of the MASH architecture is preserved.