Issue link: https://resources.pcb.cadence.com/i/1180526
PSpice User Guide Monte Carlo and sensitivity (worst-case) analyses October 2019 576 Product Version 17.4-2019 © 1999-2019 All Rights Reserved. Setting up the parameters To complete the value specification for R3, define the global parameters Pcoeff, P, and Pnom. To define and initialize Pcoeff, P, and Pnom 1. Place a PARAM part on the schematic page. 2. Double-click the PARAM part to display the Parts Spreadsheet. 3. For each parameter, create a new property by clicking New and typing its name. Enter its corresponding value by clicking in the cell under the new property name and typing its value. Specify the parameter name and corresponding value as follows. 4. Click Apply to save the changes you have made then close the Parts Spreadsheet. Using resistors with models To explore the effects of manufacturing tolerances on the behavior of this circuit, you set device (DEV) and (LOT) tolerances on the model parameters for resistors R1, R2, R3, and R4 in a later step (see Defining tolerances for the resistor models on page 577). This means you need to use resistor parts that have model associations. Because R parts do not have associated models (and therefore no model parameters), change the resistor parts to Rbreak parts that do have models. Note: When PSpice runs a Monte Carlo analysis, it uses tolerance values to determine how to vary model parameters during the simulation. Table 13-3 Property Value Pcoeff -0.06 P 0 Pnom 1.0