Abstract

The architecture of MASH 1-1-1 digital delta–sigma modulator for lengthening minimum sequence length is proposed. The first stage of the proposed multi-stage noise-shaping (MASH) delta–sigma modulator consists of two parts for the quantisation of input and the generation of long periodic feed-forward signal. The feed-forward signal results in extending the minimum sequence length invariantly to the input of the MASH 1-1-1 delta–sigma modulator. The noise power spectrum is analysed for preserving the noise-shaping capability of the MASH architecture.

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