Realization Methods of Programmable Filter and Design of Filter Scheme
Sun Fu-wen · Ludong University Journal · 2008
The realization methods of programmable filter are analyzed and then a simple scheme is designed based on the enhanced 51 MCU and LMF100 chip.Parameters of four-rank lowpass and highpass filters are controlled by clock signal outputted from MCU,which can achieve the filter parameters's programmable controlling.Relations among filter function,cutoff frequency and control clock are deduced and relative algorithms carried out by using Matlab.