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Electronically Tunable High Output Impedance Current-Mode Universal Filter
N.A. Shah, M.F. Rather and S.Z. Iqbal

A novel current-mode universal filter using two second generation current controlled conveyors (CCCIIs), one current follower (CF) and two capacitors is presented. The circuit is fully programmable and implements all the five generic filtering functions. The LP, BP, and HP functions can be realized simultaneously while notch and AP responses can be implemented simply by connecting the appropriate node currents. The availability of currents at high impedances, facilitate cascadibility feature. The filter performance factors w0 and w0/Q are electronically tunable through separate bias currents of the CCCIIs. The PSPICE simulation results are included to confirm the workability of the proposed circuit.

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