1969•Electronics LettersRequires access

Digital notch filters

A.G. Constantinides

Abstract

The letter deals with the special class of digital filters that possess a prescribed notch frequency. The present techniques for synthetising such filters rest on the bilinear-transformation method, where the designer is required to synthetise a continuous s plane notch filter, prewarp it, and then apply the transformation. It is shown here that notch filters can be synthetised directly into the z−1 plane.

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Available abstract

Key concepts: Bilinear transform, Band-stop filter, Transformation (genetics), Plane (geometry), Mathematics, Digital filter, Control theory (sociology), Filter (signal processing)