Description:

• This function returns sequence of three values:   order , ap , as ,  where

  order -  order of Chebyshev approxiamation [-]

  ap     -  passband ripple [dB]

  as     -  stopband attenuation [dB]

Info level:

Setting of variable infolevel[syntfil]  can be used to get more detailed results.

infolevel[syntfil] =

      2  - print output of function (order, Os, ap)

      3  - as level 2 + print secondary parameters of NLP (epsilon, k, k1)

Example:

>	with(syntfil):

NLP specification

>	Os,ap,as:=2,3,30;

>	cx:=ChebyshevNLPOrder(Os,ap,as);

Compute the new value of the stopband attenuation

>	Chebyshev_asnew(cx);

Compute the power transfer ratio and the characteristic function for the Chebyshev approximation

>	Chebyshev(cx,s);

Compute secondary parameter epsilon and poles of transfer function for Chebyshev approximation

>	ChebyshevPoles(cx);

Compute the power transfer ratio, characteristic function, and zeros of the transfer function for the inverse Chebyshev approximation

>	InvChebyshev(cx,s);

Compute the secondary parameter epsilon, poles and the zeros of the transfer function for the inverse Chebyshev approximation

>	InvChebyshevPolesZeros(cx);

See also: