Digital Signal Processing Reference
In-Depth Information
Elliptic 4th-Order Normalized Lowpass
Selectivity: Lowpass
Approximation: Elliptic
Implementation: Analog
Passband gain (dB): -1.0
Stopband gain (dB): -51.0
Passband freq (Hz): 0.1591549431
Stopband freq (Hz): 0.3183098862
Filter Length/Order: 04
Overall Filter Gain: 2.53911536581E-03
Numerator Coefficients
QD [S^2 + S + 1 ]
== =========================================
01 1.0 0.00000000000E+00 2.42272011683E+01
02 1.0 0.00000000000E+00 4.59326052578E+00
Denominator Coefficients
QD [S^2 + S + 1 ]
== =========================================
01 1.0 7.02545661306E-01 3.19196825769E-01
02 1.0 2.42956737746E-01 9.93226261783E-01
Figure 2.24
Elliptic normalized fourth-order coefficients from WFilter.
The magnitude and phase responses for the elliptic filters are presented in
Figures 2.25 and 2.26.
Figure 2.25
Elliptic third-order and fourth-order magnitude responses.
