高精度电流模式D/A转换器自校准电流单元的研究  

A Study on Self-Calibration Current Cells for High Accuracy Current Mode D/A Converters

作　　者：乔娟[1] 邵丙铣[1] 

机构地区：[1]复旦大学国家微电子材料与元器件微分析中心,上海200433

出　　处：《微电子学》2001年第5期329-332,共4页Microelectronics

摘　　要：介绍了自校准电流单元的原理 ,对其误差进行了分析和推导 ,并针对 VLSI工艺可能产生的失配设计了参考电流源、电流拷贝单元及备用电流拷贝单元 ,提出了新的克服沟道电荷注入误差的方法。模拟结果证明 ,电流自校准技术在克服器件失配方面有优势 ,自校准电流拷贝单元精度很高 ,适用于高精度电流模式The principle of self calibration current cell is introduced. Its imperfections are analyzed and deduced. Reference current, self calibration current cell and spare self calibration current cell are developed. A new method for overcoming channel charge dumping is described. Simulation results demonstrate that high accuracy can be achieved without the need for precise device matching by using self calibration technique, which is suitable for high accuracy D/A converters.

关 键 词：D/A转换器 电流模式 电流拷贝单元 

分 类 号：TN792[电子电信—电路与系统] TP335.4[自动化与计算机技术—计算机系统结构]