一种适用于模/数混合集成电路的新型低噪声电流控制逻辑  

Novel Low Noise Current-Steering Logic and Its Comparison With CMOS Static Logic for Mixed-Mode ICs

作　　者：缪国清[1] 徐国庆[1] 唐璞山[1] 杨崇和 

机构地区：[1]复旦大学电子工程系,上海200433 [2]贝岭微电子制造有限公司,上海200233

出　　处：《Journal of Semiconductors》1997年第3期184-192,共9页半导体学报（英文版）

摘　　要：本文给出了一种新型低噪声电流控制逻辑结构，用于在模／数混合集成电路的设计中取代静态CMOS逻辑，以减小数字开关噪声通过衬底耦合对模拟电路性能的影响．在分析了该逻辑的基本工作原理后，本文对电流控制逻辑的逻辑结构，开关特性，噪声特性和功耗及功耗-延迟积等性能与静态CMOS逻辑作了比较，并用电路模拟进行了验证．理论分析和电路模拟的结果都显示，和静态CMOS逻辑相比，新型电流控制逻辑的峰值噪声电流下降了近三个数量级．该逻辑具有很好的设计灵活性和低电压工作性能，并已成功地应用于一个高性能的过采样A／D转换电路中．A novel low noise current-steering logic structure is presented in this paper to replace the conventional CMOS static logic in Mixed-Mode ICs to reduce the impact of digital switching noise on the performance of analog circuits. After the presentation of its operation principle, comparison results are given between this new logic and CMOS static logic in the aspects of logic structure, switching characteristics, noise and power dissipation properties. Circuits simulations are used to verify the theoretical results. All these results show that, compared with CMOS static logic, the current steering logic has a better low power supply property and is easy of design optimization, its peak power supply current spikes are about three orders of magnitude smaller than those generated in static CMOS. This logic has been successfully applied in a dual-channel oversampled A/D converter.

关 键 词：混合集成电路 模数混合集在 电流控制 逻辑 

分 类 号：TN450.2[电子电信—微电子学与固体电子学]