1. Sedra, A.S.; Smith, K.C.: Microelectronic Circuits. Oxford University Press, Oxford (2004)
2. Ferri, G.; Guerrini, N.C.: Low Voltage Low Power CMOS Current Conveyors. Kluwer Academic Publishers, Boston (2003)
3. Ibrahim, M.A.; Minaei, S.; Kuntman, H.: A 22.5 MHz current-mode KHN-biquad using differential voltage current conveyor and grounded passive elements. AEU Int. J. Electron. Commun. 59(5), 311–318 (2005)
4. Herencsar, N.; Koton, J.; Vrba, K.: Single CCTA-based universal biquadratic filters employing minimum components. Int. J. Comput. Electr. Eng. 1(3), 307–310 (2009)
5. Yüce, E.; Metin, B.; Cicekoglu, O.: Current-mode biquadratic filters using single cciii and minimum numbers of passive elements. Frequenz 58(9–10), 225–228 (2004)