Overload List
Overload 1: double ChebyshevIIFilter(int Order, double StopRipple, const DewArray<double> &CutoffFreq, TFilterType FilterType, bool Analog, TVec *z, TVec *p, double &k, TIirFrequencyTransform IirFrequencyTransform = TIirFrequencyTransform::ftStateSpaceAnalog);
Design Chebyshev type II IIR filter.
| # | Name | Type | Description |
|---|---|---|---|
| 1 | Order | int | |
| 2 | StopRipple | double | |
| 3 | CutoffFreq | const DewArray<double> & | |
| 4 | FilterType | TFilterType | |
| 5 | Analog | bool | |
| 6 | z | TVec * | |
| 7 | p | TVec * | |
| 8 | k | double & | |
| 9 | IirFrequencyTransform = TIirFrequencyTransform::ftStateSpaceAnalog | TIirFrequencyTransform |
Design Chebyshev type II filter of Order with CutoffFreq frequencies and of FilterType type. Set Analog to True, to request an analog filter design in s-plane or set it to false to obtain a digital filter design in z-plane. StopRipple defines the stopband ripple in dB. CutoffFreq must be in range between 0 and 1 (Sampling frequency = 2) in case of a digital filter design.
IirFrequencyTransform specifies when and how will the frequency band transformation be applied. The resulting transfer function is returned in the zero-pole form, with z,p,k variables.
Overload 2: double ChebyshevIIFilter(int Order, double StopRipple, const DewArray<double> &CutoffFreq, TFilterType FilterType, bool Analog, TVec *sos, TIirFrequencyTransform IirFrequencyTransform = TIirFrequencyTransform::ftStateSpaceAnalog);
The resulting transfer function is returned in the second order section form stored in the sos variable.
| # | Name | Type | Description |
|---|---|---|---|
| 1 | Order | int | |
| 2 | StopRipple | double | |
| 3 | CutoffFreq | const DewArray<double> & | |
| 4 | FilterType | TFilterType | |
| 5 | Analog | bool | |
| 6 | sos | TVec * | |
| 7 | IirFrequencyTransform = TIirFrequencyTransform::ftStateSpaceAnalog | TIirFrequencyTransform |
The sos variable can be passed directly to the IirInitBQ digital filter initialization routine. Second order section form delivers substantially higher numerical stability and range than filtering with num/den form which is used by the IirInit routine.
Overload 3: double ChebyshevIIFilter(int Order, double StopRipple, const DewArray<double> &CutoffFreq, TFilterType FilterType, bool Analog, TVec *Num, TVec *Den, TIirFrequencyTransform IirFrequencyTransform = TIirFrequencyTransform::ftStateSpaceAnalog);
The resulting transfer function is returned in the numerator/denumerator form with num and den.
| # | Name | Type | Description |
|---|---|---|---|
| 1 | Order | int | |
| 2 | StopRipple | double | |
| 3 | CutoffFreq | const DewArray<double> & | |
| 4 | FilterType | TFilterType | |
| 5 | Analog | bool | |
| 6 | Num | TVec * | |
| 7 | Den | TVec * | |
| 8 | IirFrequencyTransform = TIirFrequencyTransform::ftStateSpaceAnalog | TIirFrequencyTransform |
Overload 4: double ChebyshevIIFilter(int Order, double StopRipple, const DewArray<double> &CutoffFreq, TFilterType FilterType, bool Analog, TMtx *A, TVec *B, TVec *C, double &d);
The resulting transfer function is returned in the state-space form with A,B,C,D variables.
| # | Name | Type | Description |
|---|---|---|---|
| 1 | Order | int | |
| 2 | StopRipple | double | |
| 3 | CutoffFreq | const DewArray<double> & | |
| 4 | FilterType | TFilterType | |
| 5 | Analog | bool | |
| 6 | A | TMtx * | |
| 7 | B | TVec * | |
| 8 | C | TVec * | |
| 9 | d | double & |