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This paper introduces IAFs (inverse active filters) employing CCIIs (second generation current conveyors) and grounded passive components. The IAFs enable ILP (inverse low-pass), IBP (inverse band-pass) and IHP (inverse high-pass) characteristics by adding the circuit currents. Additionally, the circuit parameters ω 0 and Q can be set orthogonally adjusting the circuit components. The achievement example is given together with simulation results by PSPICE.

This paper introduces a mixed-mode biquadratic circuit employing DVCCs (differential voltage current conveyors) and grounded passive components. The biquadratic circuit can perform mixed-mode operation selecting the input and output terminals. And the circuit enables LP (low-pass), BP (band-pass), HP (high-pass), BS (band-stop) and AP (all-pass) transfer functions by suitably choosing the input terminals. The circuit parameters ω 0 and Q can be tuned orthogonally through adjusting the passive components. The biquadratic circuit enjoys very low sensitivities with respect to the circuit components. The achievement example is given together with simulation results by PSPICE.

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