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второго порядка
typedef struct
{
unsigned char CT;
signed char A1;
signed char A2;
signed char B0;
signed char B1;
signed char B2;
signed char X1;
signed char X2;
signed char Y1;
signed char Y2;
}SFilterData;
signed char Filter_2(signed char X, TFilterData *FilterData)
{
signed int Y;
Y = (X * FilterData->B0+
FilterData->X2 * FilterData->B2+
FilterData->Y1 * FilterData->A1+
FilterData->Y2 * FilterData->A2)>>6;
FilterData->X2 = FilterData->X1;
FilterData->X1 = X;
FilterData->Y2 = FilterData->Y1;
FilterData->Y1 = Y;
return Y;
}
Коэффициенты можно с помощь, наример, deq2000 расчитать см ссылку
http://www.telesys.ru/wwwboards/mcontrol/458/messages/225479.shtml
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