Resonator-based multi-stage ΣΔ modulator for wideband applications with improved dynamic range

T. H. Chang*, Lan-Rong Dung

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

A new design methodology for wideband, multi-stage, multi-bit ΣΔ modulators (ΣΔMs) with improved dynamic range, is presented. The key to improving dynamic range is to have the first stage oscillated, then the coarse quantisation noise vanishes and hence circuit non-linearities do not cause a leakage quantisation noise problem. Based on the proposed methodology, a fourth-order four-bit SAM can achieve the dynamic range of 80 dB at the OSR of 8 without using additional calibration techniques.

Original languageEnglish
Pages (from-to)652-654
Number of pages3
JournalElectronics Letters
Volume40
Issue number11
DOIs
StatePublished - 27 May 2004

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