1. Install PADS software: First, download and install PADS software from Mentor Graphics official website. Make sure to choose the version that is appropriate for your operating system.
2. Learn the PADS interface: After opening the PADS software, take some time to familiarize yourself with the interface. Understand the functions of the main toolbar, menus and common tools.
3. Create a new project: create a new project in PADS software. Select the project folder and project name, which will be your workspace.
4. Add schematic diagram: Create schematic diagram in the project. Add circuit components to the schematic diagram and connect them to show the connection relationship of the circuit.
5. Design rules: define the rules and restrictions of PCB design, including circuit board level, size, spacing, trace width, etc. This helps to ensure the performance and reliability of the circuit board.
6. Switch to PCB layout: Switch the schematic diagram to PCB layout view. In layout view, you can arrange the position and orientation of components.
7. Layout and placement of components: In order to achieve the best layout, components are placed on the circuit board. Make sure there is enough space between components, and consider the path of signal line and power line.
8. Connecting components: Use wiring tools to draw lines on the circuit board to connect components. Pay attention to follow the design rules and specifications, and keep the layout clean and optimized.
9. Power supply and ground wire planning: Make sure to provide correct power supply and ground wire connection for each component. This is very important for the stable operation of the circuit board.
10. Check the design: After the layout is completed, use the design verification tool provided by PADS software to verify it to ensure that there are no errors and conflicts. Fix any problems or warnings.
1 1. Output manufacturing files: Finally, generate the files needed for manufacturing. These files may include Gerber files (used for manufacturing circuit boards), drilling files (used for drilling procedures) and so on.
Matters needing attention
PADS software has many powerful functions and tools, and you can master them more deeply by learning more documents, tutorials and practices. Before starting to use PADS software, it is recommended to study relevant tutorials and documents or attend training courses. This will help you understand the function and operation flow of the software.
Make sure that the version of PADS software you are using is compatible with your operating system. When downloading and installing software, please read the system requirements and compatibility instructions carefully. Set design rules and restrictions before PCB layout. These rules include size, grade, spacing, wiring width, etc. Ensure that the design meets the requirements.
Establish the correct component library and ensure that the components you use meet the specifications and requirements. Update and maintain the component library regularly to ensure accuracy and reliability. In the layout of components, the routing paths of signals and power lines are considered, with good heat dissipation and accessibility. Try to avoid overcrowding or unnecessarily extending the line.
Connect components with the routing tools of PADS software and follow the design rules. Ensure signal integrity and maintain good signal transmission and anti-interference performance. Correctly plan the layout of ground wire and power wire to ensure the stable operation of the whole circuit board and reduce signal interference. Using the signal integrity analysis tool of PADS software is helpful to detect potential signal integrity problems, such as signal interference and clock jitter.