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New Voltage-Mode All-pass Filter Topology Employing Single Current Operational Amplifier

Hasan Çiçekli , Ahmet Gökçen*

DOI: 10.28978/nesciences.286044

Abstract

In this paper, a new voltage-mode all-pass filter topology based on single current operational amplifier (COA) and the implementation of COA by using current conveyors are presented. The proposed topology employs three admittances and single active circuit element. COA implementation by using current conveyor blocks as sub-circuit contributes to workability of the COA employing circuits by using commercially available integrated circuits that can be employed as current conveyor. The validity of the proposed filter is verified by PSPICE simulation programme by using the MOSIS 0.35 micron CMOS process parameters. The simulation results agree well with the theoretical analysis and the circuit achieve a good total harmonic distortion (THD) performance.

Keywords

All-pass filters, Circuit Topology, Current Conveyors, Current Operational Amplifiers.

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