FIR Filter Design Example Let's design an FIR filter putting parameters like LPF, Tap Count=90, Sampling Frequency=1000, Fc1=200, Fc2=250. Here is frequency response. The reduction ratio of stop band has become 85dB. In order to implement the filter into hardware, you need to quantize coefficients by 16 bits. The characteristics has changed a bit. Let's generate VHDL codes!! Please put 12 for bit length of input data. The VHDL code has been listed up!! Let's save it by clicking "Save/Load". Next