一种非校正14位CMOS A/D转换器  

A Non-Calibrating CMOS 14-Bit Analog-to-Digital Converter

作　　者：高炜祺[1] 蒲佳[1] 舒辉然[1] 

机构地区：[1]中国电子科技集团公司第二十四研究所,重庆400060

出　　处：《微电子学》2008年第3期404-406,410,共4页Microelectronics

摘　　要：设计了一种高精度A/D转换器电路。为了提高匹配精度,内部DAC采用一种电容DAC的新型分段结构;通过版图设计优化,可在不进行数字校正的情况下达到14位的分辨率,最大程度地减小了设计复杂性和功耗。整体电路采用0.6μm标准CMOS工艺线进行投片验证,实现了14位转换,转换时间达到2.5μs。A high performance analog-to-digital converter was designed. In order to improve matching characteristics, a novel segmented structure consisting of capacitors was adopted for internal D/A converter. With symmetrically designed layout, the A/D converter can achieve a resolution of 14 bits without digital calibration. The design reduced circuit complexity and power dissipation. Fabricated in 0. 6 tan standard CMOS process, the A/D converter realized 14 bits conversion in 2.5μs.

关 键 词：逐次逼近 A/D转换器 分段结构 CMOS 

分 类 号：TN792[电子电信—电路与系统]