Modified Chebyshev filtering functions with low Q-factor
Khalil Massad, Rao Yarlagadda · IEEE Transactions on Circuits and Systems · 1976
A new numerical algorithm is presented which determines the coefficients of a low-pass nonequal-ripple modified Chebyshev function with multiplicity of the dominant root pair greater than one; as a result its degree is higher than the corresponding Chebyshev polynomial but a much lower dominant rootQ-factorQ_{c}is obtained. Intermediate modified Chebyshev functions with higher transition region attenuation and therefore increasedQ_{c}are also discussed.