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Analog Filter Functions


This section presents functions for creating and converting several kinds of analog filter transfer functions that are commonly used in signal processing applications. Particularly, these functions create analog prototypes that can be used as inputs to the various IIR filter routines for conversion to digital filters.

ANALOG FILTER DESIGN

Normalized Filter Design Functions
fnbut Normalized Butterworth Lowpass Filter
fncheb1 Normalized Chebyshev Type 1 Lowpass Filter
fncheb2 Normalized Chebychev Type 2 Lowpass Filter
fnbes Normalized Bessel Lowpass Filter Transfer Function

Filter Conversion Functions
fn2clp Converting From A Normalized To Continuous Lowpass Filter [O-Matrix function]
fn2chp Converting From A Normalized To Continuous Highpass Filter
fn2cbp Converting From A Normalized To Continuous Bandpass Filter [O-Matrix function]
fn2cbs Converting From A Normalized To Continuous Bandstop filter.

Other Related Functions
fnbpole Poles Of A Normalized Butterworth Filter [O-Matrix Function]
fnc1pole Poles of a Normalized Chebyshev TYPE 1 Analog Lowpass Filter
polbes Bessel polynomials of Order N
gains Complex Gain of a Laplace Transfer Function

Design Tools
makealog Analog Filter Design Tool