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Title: High input impedance HP, BP and LP filters using FTFNs
Authors: Shah, N A
Malik, M A
Keywords: Multifunction filter;Filtering functions;Four terminal floating nullors
Issue Date: Dec-2003
Publisher: NISCAIR-CSIR, India
Abstract: The paper presents a new multi function filter based on and employing four terminal floating nullors(FTFNs) which simultaneously realizes bandpass (BP) and lowpass (LP) filtering functions. The circuit can be made to realize highpass (HP) and bandpass (BP) filtering signals as well by changing one admittance and exhibits high input impedance thus, facilitating cascading of such circuits to realize higher order filters. The circuit employs grounded capacitors which suits contemporary IC design techniques and has the distinct feature of providing controllable gain of all the filtering functions through grounded passive components. Besides enjoying low passive sensitivity figures, the resonance frequency ω0 and bandwidth ω0/Q are independently tunable in a sequential manner. PSPICE simulation results are also included.
Page(s): 967-969
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.41(12) [December 2003]

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