A Multi-Stage Second Order Dynamic Element Matching with In-Band Mismatch Noise Reduction Enhancement

Yu TAMURA  Toru IDO  Kenji TANIGUCHI  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E94-C   No.8   pp.1340-1343
Publication Date: 2011/08/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E94.C.1340
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
Category: Electronic Circuits
Keyword: 
dynamic element matching,  delta-sigma digital-to-analog converter,  

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Summary: 
This paper presents a technique to enhance in-band mismatch noise reduction of multi-stage second order Dynamic Element Matching (DEM) in multi-level ΔΣ Digital-to-Analog Converters (DACs). The presented technique changes an operational behavior of multi-stage DEM to reduce mismatch noise at in-band frequency. This change improves mismatch noise shaping performance for small amplitude input signals. Simulation result using 2-stage second order DEM and a third order 17-level ΔΣ modulator with 0.5% analog element mismatch shows 3.4 dB dynamic range improvement.