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Novel switched-capacitor pseudo-N-path filter

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2 Author(s)
Kleine, U. ; University of Dortmund, Dortmund, West Germany ; Pandel, J.

The letter presents novel fully stray-insensitive switched-capacitor (SC) pseudo-N-path filters based on the theory of wave-flow networks. N-path filters are well suited for the realisation of narrowband bandpass and bandreject filters. The two main drawbacks of N-path filters, i.e. unwanted mirror frequencies due to path mismatch, and clock feedthrough located in the passband, are overcome by applying the pseudo-N-path principle. The design procedure will be demonstrated using an example of a 6-path filter based on a 3rd-order highpass prototype filter.

Published in:

Electronics Letters  (Volume:18 ,  Issue: 2 )