Current-mode biquadratic filter using DO-CCCDBAs

摘要

This paper presents a current-mode universal biquadratic filter performing three functions; low pass, high pass and band pass, based on dual-output current-controlled current differencing buffered amplifiers (DO-CCCDBAs). The features of the circuit are that the quality factor and pole frequency can be tuned independently via the input bias currents; the circuit description is very simple, consisting of merely three DO-CCCDBAs and two grounded capacitors. Without any external resistors that require component matching conditions and using only grounded elements, the proposed circuit is very appropriate to further develop into an integrated circuit. The PSPICE simulation results are depicted. The given results agree well with the theoretical anticipation.