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Radioengineering 2005
All-Pass Filters in Current ModeAbstract: Analogue first, second and high-order all-pass active filters in thecurrent mode, with constant group delay and magnitude responses, arepresented in this paper. These filters are based on a modification ofthe multi-loop feedback canonical structures using signal flow graphs.Implementations by multi-output transconductors, namely classical OTAsand novel CDTAs are given.
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