ELECTRICA

HIGH IMPEDANCE VOLTAGE-MODE MULTIFUNCTION FILTERS IMPLEMENTED BY FTFNs AND OP-AMP

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Electrical-Electronics Eng. Dept. Faculty of Engineering, Istanbul University, 34320,Avcılar, İstanbul, TURKEY

ELECTRICA 2008; 8: 643-648
Read: 386 Downloads: 281 Published: 02 January 2012

This paper presents a voltage-mode multifunction filter based on and employing two four-terminal floating nullors (FTFNs) and a single operational amplifier (OP-AMP). The high-input impedance voltage-mode configuration can simultaneously realize lowpass (LP), highpass (HP) and bandpass (BP) filtering functions from the same configuration. The circuit employs two grounded capacitors which suits contemporary IC design techniques. High output impedances of the proposed multifunction filter enable the circuits to be cascaded without requiring any impedance matching device. Passive sensitivity figures are low. The theoretical results are confirmed by PSPICE simulations.

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EISSN 2619-9831