Random Swapping Dynamic Element Matching Technique for Glitch Energy Minimization in Current-Steering DAC

被引：42

作者：

Shen, Meng-Hung ^{[1
]}

Tsai, Jen-Huan ^{[1
]}

Huang, Po-Chiun ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Elect Engn, Hsinchu 300, Taiwan

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2010年 / 57卷 / 05期

关键词：

Digital-analog conversion (DAC); dynamic element matching (DEM); glitch; TO-ANALOG CONVERTERS; DELTA-SIGMA;

D O I：

10.1109/TCSII.2010.2043400

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Dynamic element matching (DEM) has been employed to increase the spurious-free dynamic range of data converters. However, generic DEM techniques will induce additional glitch energy. This brief describes a type of the DEM method called random swapping thermometer coding for the implementation of Nyquist-rate current-steering digital-to-analog converters. The selecting direction for a sequence of unit current sources will be randomly changed. Furthermore, combining the restricted jumping technique simultaneously can further smooth low-frequency idle tones. This approach can minimize the number of switched elements as codes change, while achieving good spectrum purity as other DEM implementations. Examples from a behavior-level simulation for 6-bit converters are given to illustrate harmonic suppression and glitch energy improvement achieved by the proposed algorithm.

引用

页码：369 / 373

页数：5

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