Analog Lowpass Filter Prototypes
besselap Bessel analog lowpass filter prototype.
buttap Butterworth analog lowpass filter prototype.
cheb1ap Chebyshev Type I analog lowpass filter prototype.
cheb2ap Chebyshev Type II analog lowpass filter prototype.
ellipap Elliptic analog lowpass filter prototype.
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Analog Filter Design
besself Bessel analog filter design.
butter Butterworth analog and digital filter design.
cheby1 Chebyshev Type I filter design (passband ripple).
cheby2 Chebyshev Type II filter design (stopband ripple).
ellip Elliptic (Cauer) filter design.
Analog Filter
Transformation
lp2bp Transform lowpass analog filters to bandpass.
lp2bs Transform lowpass analog filters to bandstop.
lp2hp Transform lowpass analog filters to highpass.
lp2lp Change the cut-off frequency for a lowpass analog filter.
Filter Analysis
abs Absolute value (magnitude). (This is a MATLAB function.)
angle Phase angle. (This is a MATLAB function.)
freqs Frequency response of analog filters.
freqspace Frequency spacing for frequency response. (This is a MATLAB function.)
fvtoo lOpen the Filter Visualization Tool.
grpdelay Compute the average filter delay (group delay).
Analog Lowpass Filter Prototypes
besselap Bessel analog lowpass filter prototype.
buttap Butterworth analog lowpass filter prototype.
cheb1ap Chebyshev Type I analog lowpass filter prototype.
cheb2ap Chebyshev Type II analog lowpass filter prototype.
ellipap Elliptic analog lowpass filter prototype.
Analog Filter Design
besself Bessel analog filter design.
butter Butterworth analog and digital filter design.
cheby1 Chebyshev Type I filter design (passband ripple).
cheby2 Chebyshev Type II filter design (stopband ripple).
ellip Elliptic (Cauer) filter design.
Analog Filter Transformation
lp2bp Transform lowpass analog filters to bandpass.
lp2bs Transform lowpass analog filters to bandstop.
lp2hp Transform lowpass analog filters to highpass.
lp2lp Change the cut-off frequency for a lowpass analog filter.