Synthesis of modulation insensitive N‐path filters
S. Chang, Nicholas DeClaris, R.W. Newcomb · Networks · 1973
Abstract Through the intermediary of state‐variable equations, realization of an N‐path filter from a prescribed transfer function is obtained. An equivalence is found which shows how passive RC circuits incorporating time‐variable gyrators can be used to realize N‐path filters. It is also proved possible to realize any stable transfer function as an N‐path filter structure and that the system is insensitive to the frequency of the multiplying signals or the frequency of the gyration conductance. „Listen again to this. I have seen moonlight Sometimes the statues leaning over like reeds In the middle of living fruit, – the statues”︁[1,p. 95].