Maximally Flat Amplitude Low-Pass Filter with an Arbitrary Number of Pairs of Real Frequency Transmission Zeros
Chia-Juch Chang · IEEE Transactions on Circuit Theory · 1968
The synthesis of a general class of filter with maximally flat passband and Chebyshev stopband attenuation characteristic is presented. The filter has an nth order voltage transfer function with m pairs of transmission zeros in the stopband, wheren \geq 2 m + 1. Butterworth and inverse Chebyshev filters are special cases of this general class withm = 0andn = 2m + 1, respectively.