Sonnet User's Guide - Sonnet Software

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Sonnet User’s Guide Analysis of the Network File The last step to complete the analysis of the filter is to analyze the netlist project created by the subdivide. The analysis controls you entered in the original project are the ones you wish to use to analyze the netlist, so the analysis setup is already complete. An adaptive sweep from 2.3 GHz to 2.5 GHz will be performed on the netlist. 17 Click on the project editor window containing the netlist to make this the active file. This is indicated by the title bar on the netlist being highlighted. TIP You can switch the active file in the project editor by clicking on the title bar of the project window or by selecting the project from the Windows menu on the main menu. 18 Click on the Analyze button to launch the netlist analysis. The analysis monitor appears on your display. The project legend indicates that subdivide_net_s1.son is being analyzed. Em will perform an adaptive sweep on each of the five subprojects and then use the resulting data to analyze the network. Status messages are output under the progress bar. 236
Chapter 15 Circuit Subdivision Tutorial There are two results that are significant to observe. A comparison of the netlist analysis data with the analysis data from the source circuit, and a comparison of the amount of time and memory each analysis used. We have provided the source project file including analysis data under the example sub_whole.son available in the Sonnet Examples. The graph below shows the results of the netlist analysis versus the results of a full analysis of the source project. As you can see there is very good agreement between the two analysis results. Both files were analyzed on the same computer. The time required for the netlist was actually longer than the time required to analyze the circuit as a whole because this was a simple example chosen for clarity, and the benefits of circuit subdivision are only seen for larger circuits. Using circuit subdivision reduces your memory requirements for analysis of a large circuit. Each of the subprojects requires less subsections to analyze than the complete circuit. This improvement comes as a result of reducing the number of subsections for any given analysis since both computation time and memory requirements rise sharply as the subsections go up, as shown on the chart below. For 237
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