ComputeGain Routines

Summary

Returns gain of a filter with zeroes in z and poles in p.

Declaration

Function ComputeGain(z, p: TVec; Val: TSample = 1): TSample;

Description

Returns gain of a filter with zeroes in z and poles in p. Val parameter defines the value at which to evaluate the rational polynomial:


  (x-z1)*....*(x-zn)      (Val-z1)*....*(Val-zn)
  ------------------ ==>  ---------------------- = number
  (x-p1)*....*(x-pn)      (Val-p1)*....*(Val-pn)

  x - variable
  z1..zn - zeros
  p1..pn - poles

The routine assumes that the coefficients of the polynomial are all real and therefore returns only the real part of the result.

Declaration

Function ComputeGain(z, p: TVec; Val: TCplx): TSample;

Description

Returns gain of a filter with zeroes in z and poles in p. Val parameter defines the value at which to evaluate the rational polynomial.