Universal Biquadratic Current-Mode Filter Using a Single EX-CCCII

This paper present a current-mode electronically tunable biquadratic filter. A single EX-CCCII is used for designing the new circuit. Moreover two capacitors and three switches are also used. All standard second order filter responses are realized by selecting the proper input current terminals (I
_IN1
, I
_IN2
) and switches (SW
₀
, SW
₁
, SW
₂
). The circuit parameters; quality factor (Q), and the angular frequency (ω
_o
) are independent. For the fixed value of capacitances and bias current, the ω
_o
can be increased further by using the digital control word (k). The workability of the proposed circuit is demonstrated through the PSPICE simulator.