Abstract
This paper reports on a design method of the intermediate frequency active band-pass filter (IF BPF) using two pairs of a new current conveyor (CFCC II) and some passive CR elements. The CFCC II consists of a conventional second-generation current conveyor (CC II) and an additional current follower. The quality factor (Q) of the filter is calculated from an approximate equation, considering the frequency limit and the stability of the filter obtained from the observed characteristics of CFCC II. The second-order IF BPF is simply designed by using the approximate equation and the stable operation of the filter is experimentally confirmed under the condition of Q≤100 at 455kHz. This design method also validates in the fourth-order IF BPF which is realized by cascading two sets of the second-order TF BPFs.
