期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2015
卷号：3
期号：4
DOI：10.15680/ijircce.2015.0304089
出版社：S&S Publications
摘要：A low power high speed differential current comparator having weak current operation has beenpresented in this paper. The comparator proposed is a three stage process. It utilizes a modified Wilson's current mirrorcircuit for current to voltage conversion for its first stage followed by differential amplifier stage and buffer stage. Thecurrent comparator is simulated using Cadence Virtuoso 0.18μm CMOS technology and it can successfully generatevalid output response for a range of input frequencies. Working at a supply of 1.8V, the comparator is capable ofsensing a minimum difference of 22nA for 4μA reference current. In addition power dissipation of this circuit is as lowas 226μW and shows a swift response resulting in a propagation delay which is less than 0.8ns for an input differenceof 1μA.
关键词：current comparator; Wilson's current mirror comparator; single-ended differential amplifier; buffer;inverter
