Extending minimum sequence length invariantly to constant input for MASH 1-1-1 digital delta–sigma modulator

• Published in: Electronics letters Vol. 53; no. 21; pp. 1394 - 1396
• Main Author: Song, J
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 12.10.2017
• Subjects: Circuits and systems; delta‐sigma modulation; input quantisation; long periodic feed‐forward signal generation; MASH 1‐1‐1 digital delta‐sigma modulator; minimum sequence length; multistage noise‐shaping; noise power spectrum analysis; quantisation (signal); signal generators; delta-sigma modulation; MASH 1-1-1 digital delta-sigma modulator; noise power spectrum analysis; signal generators; input quantisation; quantisation (signal); minimum sequence length; long periodic feed-forward signal generation; multistage noise-shaping
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2017.1777

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.