Design of sharp cutoff low-pass maximally flat RC-active filters by cascading third-order blocks
Che‐Ho Wei · IEEE Transactions on Circuits and Systems · 1980
Pairs of coincidentj{\omega}-axis zeros are added to the multiple real root maximally flat (MURROMAF) approximation function for designing sharp cutoff low-passRC-active filters. Expressions for transfer function and cutoff slope are derived in terms of the ordern, the multiplicity of the real pole\mu, the number of pairs ofj{\omega}-axis zerosmand their locations. A design example is also given to illustrate the procedure for finding out the best transfer function.