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28 The PCB Design Magazine • February 2017 the obvious layout issues before the design is handed over to the PI engineers. Summary With the automated analysis in place, de- sign and analysis data unified in one system, and using an integrated design and analysis environment, PCB designers can better under- stand PI issues from the early stages of the de- sign, find the PI problems, and fix the layout during the layout design stage to avoid severe issues with power integrity. This allows hard- ware engineers, PCB designers, and PI experts work together smoothly and efficiently. Streamlining the process results in the de- sign delivered on time, on budget, and of a su- perior quality. PCBDESIGN Dingru Xiao has more than 27 years of electrical and electronics industrial experience covering soft- ware, hardware and system devel- opment and testing, digital signal processing, etc. He joined Cadence Design Systems in 2002. data, thus saving time and avoiding errors. The tool can also track the schematic changes for the power system, and check the effects of the changes made to the design. It supports both DC and AC analysis setup automation. With PowerTree technology, the design en- gineer can access early visualization stages and can define the simulation criteria. This ensures that the layout engineer makes the correct lay- out changes and can pursue decap placement, so the production design meets the target re- quirements for each component. Integrated Design/Analysis Environment Using this integrated design and analysis model, users can debug the layout with side-by- side windows, showing analysis results for the specified layout. Using the cross-probing capa- bility (Figure 6) and incremental layout update capabilities, layout editing is intuitive and goal- oriented. If PI experts have already prepared the work- space, then PCB designers can do the batch mode analysis to get a HTML report and then use it to track all violations in layout environ- ment. This helps PCB designs to quickly handle A NEW POWER DESIGN METHODOLOGY FOR PCB DESIGNS Figure 6. Cross-probing between PCB design and PCB analysis.