Abuelma’atti, M. T. and Fares, O. O. (2011) “A New Universal Second-Order Filter using Configurable Analog Building Blocks (CABs) for Filed-Programmable Analogue Arrays”, The Journal of Engineering Research [TJER], 8(1), pp. 83–91. doi: 10.24200/tjer.vol8iss1pp83-91.