Jasper Gerth / Biquad

A simple biquad filter

Dependents:   emgfilter includeair includeair Encodertest ... more

Biquad.cpp@2:3a80d1f8f30a, 2015-10-29 (annotated)

Committer:
Gerth
Date:
Thu Oct 29 14:03:02 2015 +0000
Revision:
2:3a80d1f8f30a
Parent:
0:ba910c57d594 
converted floats to doubles

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Gerth 0:ba910c57d594 1 #include "Biquad.h"
Gerth 0:ba910c57d594 2
Gerth 0:ba910c57d594 3 Biquad::Biquad(){};
Gerth 0:ba910c57d594 4
Gerth 0:ba910c57d594 5 double Biquad::filter( double u, double &v1, double &v2, const double a1, const double a2,
Gerth 0:ba910c57d594 6 const double b0, const double b1, const double b2 )
Gerth 0:ba910c57d594 7 {
Gerth 0:ba910c57d594 8 double v = u - a1*v1 - a2*v2;
Gerth 0:ba910c57d594 9 double y = b0*v + b1*v1 + b2*v2;
Gerth 0:ba910c57d594 10 v2 = v1;
Gerth 0:ba910c57d594 11 v1 = v;
Gerth 0:ba910c57d594 12 return y;
Gerth 0:ba910c57d594 13 }