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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.43 [2005] >
IJPAP Vol.43(02) [February 2005] >
| Title: | Current-mode universal biquadratic filter with single input and four outputs using FTFNs |
| Authors: | Shah, N A
Malik, M A |
| Keywords: | Universal filter
Biquadratic filters
Current-mode filters
Four terminal floating nullors
Filtering functions |
| Issue Date: | Feb-2005 |
| Publisher: | CSIR |
| IPC Code: | H 03 K 3/00 |
| Abstract: | A novel four terminal floating nullor
(FTFN) based universal current-mode (CM) biquadratic filter configuration with
single input and four outputs (SIFO) is presented. The circuit is based on and employs six FTFNs of the same
polarity and as many passive components and realizes simultaneously lowpass
(LP), highpass (HP), inverted bandpass (BP) and Notch filtering functions
without any imposition of component matching conditions or cancellation
constraints. The circuit can also be made to realize allpass (AP) response by
tying together appropriate output filtering signals. The topology has the
distinct feature of low input and high output impedances which permits easy
cascading for the construction of higher order filters. The circuit enjoys low
passive sensitivity figures. The resonance frequency ωo and bandwidth
ωo/Q
can be independently tuned while as resonance frequency ωo and quality
factor Q can be orthogonally adjusted. Experimental and PSPICE simulation
results are given to confirm the theoretical results. |
| Page(s): | 142-144 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.43(02) [February 2005]
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