User`s guide

Analog Filter Design
5-24
attenuation R
s
. Frequency values are in rad/s, and ripple and attenuation
values are in dB.
The analog filters are designed using the Signal Processing Toolbox’s filter
design commands
buttap, cheb1ap, cheb2ap, and ellipap, and are
implemented in state-space form. Filters of order 8 or less are implemented in
controller canonical form for improved efficiency.
Supported
Data Types
Dialog Box
The parameters displayed in the dialog box vary for different design/band
combinations. Only a portion of the parameters listed below are visible in the
dialog box at any one time.
Design method
The filter design method:
Butterworth, Chebyshev type I, Chebyshev
type II
, or Elliptic. Tunable.
Lowpass Highpass Bandpass Bandstop
Butterworth
Order, Ω
p
Order, Ω
p
Order, Ω
p1
, Ω
p2
Order, Ω
p1
, Ω
p2
Chebyshev Type I
Order, Ω
p
, R
p
Order, Ω
p
, R
p
Order, Ω
p1
, Ω
p2
, R
p
Order, Ω
p1
, Ω
p2
, R
p
Chebyshev Type II
Order, Ω
s
, R
s
Order, Ω
s
, R
s
Order, Ω
s1
, Ω
s2
, R
s
Order, Ω
s1
, Ω
s2
, R
s
Elliptic
Order, Ω
p
, R
p
, R
s
Order, Ω
p
, R
p
, R
s
Order, Ω
p1
, Ω
p2
, R
p
, R
s
Order, Ω
p1
, Ω
p2
, R
p
, R
s
Double-precision floating point