Masood ul-Hasan, Yichuang Sun, Yisheng Zhu. Second-order OTA-C filters using a single OTA. In Proceedings of the 2005 European Conference on Circuit Theory and Design, ECCTD 2005, Cork Ireland, August 29th - September 1st 2005. pages 201-204, IEEE, 2005. [doi]
Abstract is missing.