Single Active Element Based Three input Single output Trans-admittance mode Biquad Universal Filter

In this paper, a new three input single output trans-admittance mode biquad universal filter is proposed, which employs only single active element, namely modified differential voltage current conveyor trans-conductance amplifier (MDVCCTA) and four passive elements in the form of two capacitors and two resistors. Two of the passive elements used in the proposed structure (one resistor and one capacitor) are permanently grounded. The proposed circuit is capable of realizing trans-admittancemode low pass (LP), high pass (HP), band pass (BP), band reject (BR) and all pass (AP) filtering responses. The two filter parameters such as quality factor and bandwidth are electronically tunable without effecting the pole frequency. In addition, the proposed filter circuit also enjoys the low active and passive sensitivities. PSPICE simulation results using 0.35um CMOS technology are shown to prove the performances of the proposed circuit. KeywordTrans-admittance-mode, analog signal processing, filter, biquad, DVCCTA.