Novel Dual Mode Multifunction Filter Employing Highly Versatile VD-DXCC

In this research a new highly versatile analog building block (ABB), the voltage differencing dual X current conveyor (VD-DXCC), is proposed. It is employed to synthesize a versatile dual mode biquadratic filter. The proposed filter uses canonical number of passive elements and has inbuilt tunability feature. In addition, the proposed filter can work as multi input single output (MISO) and single input multi output (SIMO) filter in current mode (CM) of operation. Furthermore, the quality factor and pole frequency of the filter can be set independently. The non-ideal gain analysis and sensitivity analysis of the filters is also carried out to study the effect of process variations and process spread on the filter response. The proposed designs are validated using 0.18um Silterra Malaysia process design kit (PDK) in Cadence Virtuoso design software. The parasitic extraction is carried out using Calibre tool from Mentor Graphics. The complete layout of the VD-DXCC is made and post layout simulation results are given for each design. The post layout results are in close agreement with the theoretical analysis.

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