A novel current-mode (CM) single-input and three-output (SITO) 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 lowpass (LP), bandpass (BP), and highpass (HP) functions can be realized simultaneously
while Notch (BS) and allpass (AP) responses can be implemented simply by connecting the appropriate node currents without
requiring additional elements. The availability of currents at high impedances, facilitate cascadibility feature. The filter
performance factors ω
0 and ω
0/Q are electronically tunable through separate bias currents of the CCCIIs. SPICE simulation results are included to confirm
the workability of the proposed circuit.
Keywords Current controlled current conveyors - Current follower - Current-mode active filters