New Current-Controlled Current-Mode Multifunction Filter Using Translinear Current Conveyors

A new current-mode universal biquadratic filter with two inputs and two outputs employing only two translinear current conveyors with controlled gain and two grounded capacitors is proposed. The proposed circuit offers the following features: realization of lowpass, bandpass, highpass, bandstop and allpass current responses from the same configuration, no requirements for component-matching conditions, independent current control of the natural frequency and the quality factor, low active and passive sensitivities, minimum active and passive components, high impedance output. The characteristics of the proposed circuit are simulated using PSPICE to confirm the theory.