PADS软件是MentorGraphics公司的电路原理图和PCB设计工具软件。目前该软件是国内从事电路设计的工程师和技术人员主要使用的电路设计软件之一，是PCB设计高端用户最常用的工具软件。-PADS software is MentorGraphics' s schematic and PCB design tools. The software is currently engaged in the domestic circuit design engineers and technicians primarily use one of the circuit design software, PCB design high-end users is the most commonly used tools.