A filter designer's filter design aid: filtorX

Abstract

An interactive filter design program suitable for both nonexperts and experts is described. A system library provides the necessary functionality for most design problems. Its language basis allows extensibility for expert users. Examples of code to generate biquads which are automatically paired, ordered, and scaled for dynamic range, and to determine capacitor-ratios for switched-capacitor biquads are provided to illustrate filtorX's potential.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>