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

作者：Tamura Yu^*; Ido Toru; Taniguchi Kenji

来源：IEICE - Transactions on Electronics, 2011, E94C(8): 1340-1343.

DOI：10.1587/transele.E94.C.1340

• dynamic element matching
• delta-sigma digital-to-analog converter

This paper presents a technique to enhance in-band mismatch noise reduction of multi-stage second order Dynamic Element Matching (DEM) in multi-level Delta Sigma 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 Delta Sigma modulator with 0.5% analog element mismatch shows 3.4 dB dynamic range improvement.

• 出版日期2011-8