A Novel Automatic Placement Generation Tool for Current Mirror in Analog Circuits

Analog layout design lacks effective automation tools and is still performed manually. For the placement of current mirror which is one of the most important building blocks in the analog circuit, existing methods typically rely on the common centroid technique, and do not include cascode current mirrors with various transistor lengths. This paper developed an automatic placement generation tool utilizing procedural method, which is applicable to all current mirror variants. This tool generates a diverse set of valuable solutions and automatically performs de-duplication and filtering. The solutions exhibit optimal aspect ratios and area occupancy, with improved routability and reduced wire length during routing.