DSP.Filter.IIR.Design

Lowpass, Highpass, Bandpass IIR design functions

Method:

1. Design analog prototype
2. Perform analog-to-analog frequency transformation
3. Perform bilinear transform

Documentation

poly2iir :: ([a], [b]) -> (Array Int a, Array Int b)

butterworthLowpass

Arguments

:: (Double, Double)

(wp,dp)

-> (Double, Double)

(ws,ds)

-> (Array Int Double, Array Int Double)

(b,a)

Generates lowpass Butterworth IIR filters

butterworthHighpass :: (Double, Double) -> (Double, Double) -> (Array Int Double, Array Int Double)

butterworthBandpass :: (Double, Double) -> (Double, Double) -> (Array Int Double, Array Int Double)

chebyshev1Lowpass

Arguments

:: (Double, Double)

(wp,dp)

-> (Double, Double)

(ws,ds)

-> (Array Int Double, Array Int Double)

(b,a)

Generates lowpass Chebyshev IIR filters

chebyshev2Lowpass

Arguments

:: (Double, Double)

(wp,dp)

-> (Double, Double)

(ws,ds)

-> (Array Int Double, Array Int Double)

(b,a)

Generates lowpass Inverse Chebyshev IIR filters

mkButterworth

Arguments

:: (Double, Double)

(wp,dp)

-> (Double, Double)

(ws,ds)

-> (Array Int Double, Array Int Double)

(b,a)

Deprecated: Use butterworthLowpass instead

Generates lowpass Butterworth IIR filters

mkChebyshev1

Arguments

:: (Double, Double)

(wp,dp)

-> (Double, Double)

(ws,ds)

-> (Array Int Double, Array Int Double)

(b,a)

Deprecated: Use chebyshev1Lowpass instead

Generates lowpass Chebyshev IIR filters

mkChebyshev2

Arguments

:: (Double, Double)

(wp,dp)

-> (Double, Double)

(ws,ds)

-> (Array Int Double, Array Int Double)

(b,a)

Deprecated: Use chebyshev2Lowpass instead

Generates lowpass Inverse Chebyshev IIR filters