Abstract
The method of least squares (MLS) is used to develop an algorithm for the optimum design of any type of fllter under any design speciflcations for the realization of lowpass, bandpass, highpass and bandstop characteristics. The proposed fllter design method can be used for any general fllter network topology, which provides high ∞exibility for the selection of circuit conflgurations suitable for any desired application. The MLS fllter design procedure also incorporates source and load impedance matching, which eventually leads to the simplicity of circuits. The proposed method of fllter design may be used for lowpass prototype fllters or directly for bandpass, highpass or bandpass fllters. Several examples of MLS fllter designs are given, which compare very well with the classical methods and indicate the advantages of the proposed method of fllter design. The MLS fllter design may realize any frequency response characteristics, such as spurious response elimination, multiband fllter realization and enhancement of some desired behaviors.
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