Kapil Dev Sharma and Kirat Pal and Costas Psychalinos , A Resistorless High Input Impedance First Order All-Pass Filter Using CCCIIs. journal = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology. January 2013, vol. 74(2). 213 - 215 [viewed 19 September 2024]. Available from: https://publications.waset.org/pdf/9996920.