An evolutionary design model for reducing the ripple of analog filter

Analog circuits are the basis of modern electronic system, its automatic design do not need designers have rich knowledge and experience. Meanwhile the circuits will have more abundant structure which beyond the limits of manual design. In the process of circuit design, the output ripple is one of the technical indicators. Since the resulting output of the final evolved filter circuit is not ideal, leading to the output ripple after filtering sometimes still do not meet the design requirements. So in order to solve this problem and reduce the output ripple, this paper presents a model based on the weighted average of two different filter circuits, according to the output difference between different circuits, they can complement each other, cancel each other, thereby reducing the output ripple of final circuit. The statistical 30 times experiments show, compared with a single filter circuit, the output of our model becomes more smoothly, the output variance in sampling points becomes smaller, and the ripple of final output is also becomes smaller.