A current-mode 5/sup th/ order elliptic lowpass filters
2001
A novel analogue continuous-time current-mode filter synthesis technique is proposed based on a transformed set of state-equations that allow the utilization of only current-mode integrators; current-mode gyrators specifically designed are not necessary. The technique has been successfully used for synthesizing a 5th order lowpass elliptic filter from a passive doubly loaded ladder prototype. Only grounded capacitors are necessary; all floating capacitors and inductors are replaced with active simulations. Small-signal analyses have shown this filter performs well, preserving the low sensitivity inherent to the passive ladder prototype.
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