Novel Realization of Second Order Inverse Bandreject Filter and Inverse Allpass Filter Using Operational Transresistance Amplifier

In this work, the authors have presented a technique to realize the operations of 2nd order inverse bandreject filter (IBRF) and inverse allpass filter (IAPF) with two operational transresistance amplifiers (OTRAs) along with some capacitors and resistors (passive components). SPICE is used as a simulation tool to verify the working of the proposed configuration. 180 nm CMOS model of OTRA has been implemented in SPICE. Theoretical analysis of the proposed configuration has been performed. Both theoretical and simulated characteristics are found almost identical. Input and output noise performance has been studied. Monte Carlo simulation was also performed in SPICE. Experimental verification of the proposed circuit has also been done with AD844 IC.