xuan!LAB

這是篇參考PSoC Application Note所記錄的留檔

Single-Pole Infinite Impulse Response (IIR) Filters

int32 LowPassFilter(int32 input) 
　{
 　int32 k; 

　input <<= 8; 　filt = filt + ((input-filt) >> 4); 
　k = (filt>>8) + ((filt & 0x00000080) >> 7); 
　return k; 
　} 

IIR simulation in excel

  iirFilterExcel (45.6 KiB, 222 次下載)

AN-2099 PSoC® 1, PSoC 3, PSoC 4, and PSoC 5LP - Single-Pole Infinite Impulse Response (IIR) Filters