Frequency Transformations in the Analog Domain and Applications
To obtain analog transfer function based on low-pass prototypes one uses frequency transformations. Detailed theory is given for transformation of the zeros and poles of the prototype low-pass transfer function into a new one of a band-pass, high-pass, and band-stop type. Advice is given as to how an all-pass transfer function is obtained from a low-pass prototype. Examples are given with both tables and figures demonstrating the migration of the filter’s characteristic frequencies.
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