OTA based active current-mode resonator [active filter applications]

This work presents the design of an active current-mode resonator with complex coefficients based on the operational transconductance amplifier (OTA). The proposed active resonator can be used as a foundation to realize high-order complex filters in cascade or leapfrog configurations. For realizing the active resonator herein, only two grounded capacitors as passive elements are required. Thus, the proposed active resonator is suitable for integrated circuit realization. Simulation results are also obtained to verify the theoretical analysis.