Continuous-time Delta-Sigma Modulators: Single-loop versus MASH

Abstract

Oversampled continuous-time (CT) Delta-Sigma modulators (DSM) have been continued to increase the maximum clock rate, thus extending the achievable signal bandwidth. This development is the result of advanced CMOS technologies and innovative ways to employ this technology. On the other hand, single-loop (SL) and multi-stage noise-shaping (MASH) are two essential architectures for the implementation of CT DSMs. This paper outlined advanced SL and MASH improvements for CT DSMs and compared both of them.