Biquadratic universal filter based on CCDDCCTA
A voltage mode (VM) biquadratic universal filter using a current controlled differential difference current conveyor transconductance amplifier (CCDDCCTA) is discussed. The proposed filter uses two capacitors and one CCDDCCTA block only. It has following important facets: (i) Low pass (LP), band pass (BP), high pass (HP), notch and all pass (AP) voltage responses using same configuration, (ii) All the responses are electronically tunable, (iii) Uses only two passive components and (iv) Non-ideality effect due to parasitic capacitances may be compensated. The functionality of design is verified using 0.25μm TSMC process technology.