New Electronically Tunable Immittance Simulator using CBTA and its Filtering Applications

The purposed work describes an immittance simulation structure by using dual Current Buffered Transconductance Amplifier (CBTAs) along with three passive elements connected in grounded state. The simulator can be employed to emulate the function of inductor and capacitor multiplier. The presented circuit provides electronic tuning of the realized inductor and capacitor multiplier behaviour through change in biasing current. The proposed emulator is based upon any active/passive element value/parameter related condition fulfilment and its behaviour is investigated on considering the non-idealities of the CBTA. To validate the usefulness of presented immittance simulator some filter designs (Voltage and Current Mode High-pass filters) are developed using proposed configuration. The PSPICE simulation environment with TSMC 0.18µm technology node has been employed to check the developed circuits.