一种新的高性能开关电流排序电路  

Novel High Resolution Switched Current Sorter Based on Magnitude

作　　者：林谷[1] 石秉学[1] 

机构地区：[1]清华大学微电子学研究所

出　　处：《Journal of Semiconductors》1998年第2期144-150,共7页半导体学报（英文版）

基　　金：国家自然科学基金;高校博士点基金

摘　　要：本文首次提出了一种高性能的开关电流型排序电路．它采用开关电流镜跟踪／保持输入信号，通过全对称的ＷＴＡ（Ｗｉｎｎｅｒ－Ｔａｋｅ－Ａｌ）电路网络求最大，最后分时输出排序结果．该电路结构简单、灵活，规模易扩展．ＰＳＰＩＣＥ模拟结果表明，该电路的输出电流相对于输入电流的偏差小，最大偏差为５μＡ；排序电路有较高的分辨精度，在５μＡ以内．由于采用开关电流技术，该电路完全同数字ＣＭＯＳ工艺相兼容。Abstract A novel high resolution switched current sorter based on magnitude is firstly proposed. In this sorter, switched current circuit is used to track/hold input signals. High resolution symmetric WTA (Winner Take All) network is employed to find the maximum current. Then, sorted currents based on magnitude are output in time shared way.The structure of this sorter is simple, flexible and its scale can be easily extended. PSPICE simulation shows that the deviation of output current from the corresponding input current is small,the maximum deviation is 5μA, and the sorting resolution is better than 5μA. Since switched current structure is employed, this sorter is able to be fully compatible with a standard digital CMOS process and easily implemented in VLSI technology.

关 键 词：开关电流型 排序电路 VLSI 数字集成电路 

分 类 号：TN47[电子电信—微电子学与固体电子学] TN431.2