  In this paper, a circuit employing current controlled current conveyor
trans-conductance amplifiers (CCCCTAs) as active element is proposed which can
function both as biquad filter and oscillator. It uses two CCCCTAs and two
capacitors. As a biquad filter it can realizes all the standard filtering
functions (low pass, band pass, high pass, band reject and all pass) in
voltage-mode and provides the feature of electronically and orthogonal control
of pole frequency and quality factor through biasing current(s) of CCCCTAs. The
proposed circuit can also be worked as oscillator without changing the circuit
topology. Without any resistors and using capacitors, the proposed circuit is
suitable for IC fabrication. The validity of proposed filter is verified
through PSPICE simulations.
