Design of Multifunctional Quadratic Current-mode Filter Based on MOCCII

A circuit model of quadratic current-mode filter with one input and three outputs is provided,which can turn out many filters.Every filter is constructed by four MOCCIIs and two grounded C elements as well as some grounded R elements,which can carry out second-order low-pass,high-pass and band-pass at the same time.It also can obtain the functions of second-order notch and all-pass filtering by connecting the outputs together directly.Compared with the analogous filters,it is simpler,more active,more convenient to integrated and its center frequency and the quality factor can be adjusted separately also.At the same time,its character is tested through experiments,testifying its goodness and feasibility.