Published in Xiao, R., Laknaur, A., & Wang, H. (2007). A fully programmable analog window comparator. IEEE International Symposium on Circuits and Systems, 2007 (ISCAS 2007), 3872-3875. doi: 10.1109/ISCAS.2007.377884 ©2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.


This paper presents a novel design of analog window comparator circuit. The comparator can adaptively adjust its error threshold according to the magnitude of input signal levels. In addition, the circuit can be digitally programmed to realize different error threshold adapting schemes. The design is fabricated using a 0.18mum CMOS technology. Testing results of the fabricated chip are also presented.