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26 The PCB Design Magazine • February 2017 perts. For example, the IR drop analysis setup automation flow is shown in Figure 2. For decap selection and optimization, the setup automation flow is shown in Figure 3. Because the simulation setup is automated, either the layout designer or PI engineer can validate that target impedance constraints are met as an in-design task. Both pre- and post- Figure 2: IR drop analysis setup automation flow. Figure 4: AMM model editing/assignment. Figure 3: Decap selection and optimization setup automation flow. A NEW POWER DESIGN METHODOLOGY FOR PCB DESIGNS