Analog circuit synthesis by superimposing of sub-circuits

An automated analog circuit synthesis based on searching combinations of sub-circuits is proposed. In general, it is difficult to fabricate an automatically synthesized circuit without any modification, since it has a topology far from well-known structures. Thus moderate topological constraints are introduced by employing `prototype´ circuits, which are given by the user, to provide hints on circuit configuration. In the proposed system, the prototype circuits are automatically decomposed into sub-circuits by the system, then the optimum sets of the sub-circuits are searched by using a genetic algorithm. The set of sub-circuits is combined with a novel technique where the nodes of the sub-circuits are shared. The capabilities of the proposed method are demonstrated through the synthesis of cubing circuits