关键词: 模拟电路数字化, 二阶RC无源低通滤波电路, Matlab, C

Abstract:

In signal processing,filtering has a direct impact on the accuracy of signals.While analog filters are fast but inflexible,digital filters are better but more complex.Based on an analog filter,a digital filter with the same function and adjustable parameters is designed,and exemplified by a second-order RC passive low-pass filtering circuit.The new design has the advantages over conventional analog and digital filters of simple algorithm and stability without the side effect of parasite parameters,precision and temperatures factors in the analog devices.

Key words: digitizing an analog filter;the second order RC passive low pass filtering circuit;Matlab;C