User`s guide

Analog Filter Design
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5Analog Filter Design
Purpose Design and implement an analog filter.
Library Filtering / Filter Designs
Description The Analog Filter Design block designs and implements a Butterworth,
Chebyshev type I, Chebyshev type II, or elliptic filter in a highpass, lowpass,
bandpass, or bandstop configuration.
The input must be a sample-based scalar signal.
The design and band configuration of the filter are selected from the Design
method
and Filter type pop-up menus in the dialog box. For each combination
of design method and band configuration, an appropriate set of secondary
parameters is displayed.
The table below lists the available parameters for each design/band
combination. For lowpass and highpass band configurations, these parameters
include the passband edge frequency Ω
p
, the stopband edge frequency Ω
s
, the
passband ripple R
p
, and the stopband attenuation R
s
. For bandpass and
bandstop configurations, the parameters include the lower and upper
passband edge frequencies, Ω
p1
and Ω
p2
, the lower and upper stopband edge
frequencies, Ω
s1
and Ω
s2
, the passband ripple R
p
, and the stopband
Filter Design Description
Butterworth
The magnitude response of a Butterworth filter is
maximally flat in the passband and monotonic overall.
Chebyshev
type I
The magnitude response of a Chebyshev type I filter is
equiripple in the passband and monotonic in the
stopband.
Chebyshev
type II
The magnitude response of a Chebyshev type II filter is
monotonic in the passband and equiripple in the
stopband.
Elliptic
The magnitude response of an elliptic filter is
equiripple in both the passband and the stopband.