Balanced low input impedances CMOS current comparator

IEICE Electronics Express

Sheng Feng Lin¹  Chun Wei Lin² 

[1] Graduate School of Engineering Science and Technology, National Yunlin University of Science & Technology;Department of Electronic Engineering, National Yunlin University of Science & Technology

关键词: current comparator;    input impedance;    common-gate structure;    common-source feedback;   

DOI  :  10.1587/elex.9.1378

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(7)This paper presents a continuous-time current comparator with low input impedance enhancing the accuracy of comparison. The proposed circuit employs low impedance common-gate structures as input stages and further uses common-source feedback structures to enable extremely reduction of input impedances. The input impedances are well designed to be balanced, so that the proposed design can be applied to perform precise comparison between two terminals with tiny varied currents. An implemented chip was fabricated by TSMC 0.35µm CMOS process with its input impedances and propagation delay are 66.8Ω, 66.6Ω and 2.5ns respectively while the average power consumption is about 1.64mW.

【 授权许可】

Unknown