電子コース 容量 Change the characteristics of the RC low-pass filter by cascading
When two RC low-pass filters are cascaded, the signal level to be blocked can be suppressed more than in the case of one. It's easy to understand in the image, but it's a little difficult in the formula. A cascading filter circuit that looks easy and is difficult to understand. This time, let's understand the characteristic change of this cascaded low pass filter (LPF: Low Pass Filter) with LTspice and ADALM.