What is fir digital filter.glass cap Photoresistor Vendor

　　1.1 What is FIR filter?

　　FIR filter is one of the two basic filters often used in digital signal processing (DSP), the other one is IIR filter.

　　1.2 What does FIR stand for?

　　FIR is short for Finite Impulse Response.

　　1.3 How to understand the finite in FIR(finite Impulse response)?

　　The impulse response is finite meaning that there is no feedback in the filter.

　　1.4 How to pronounce FIR?

　　Some people just say the vowel F-I-R; Some people pronounce it fir [:], fir is a fir tree.

　　1.5 What are the alternatives to FIR filters?

　　There is another class of DSP filters: IIR(Infinite Impulse Response). IIR filters use feedback, so when the signal is input, the output is recycled according to the algorithm.

　　1.6 Comparison between FIR filter and IIR filter?

　　Each has advantages and disadvantages. But in general, the advantages of FIR filter far outweigh the disadvantages, so in practical application,FIR filter than IIR filter is used more.

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