DC Sweep Analysis
DC Sweep analysis mode allows to study the effect of variation of parameters of circuit elements when the parameter of one circuit element is varied keeping the parameter of another circuit element constant, through out a range of values. This also helps to set up the best operating conditions for the design, before detailed functional analysis is made.
Select Analysis menu from the main menu to open Setup Simulation Parameter with the option Analysis being highlighted on the left side of the window by default. Set the general parameters and select DC Sweep Analysis from the tree view (also obtained on right clicking Analysis). One or two circuit elements may be selected for the analysis. If a single element is selected, it is known as Single DC Sweep Analysis. If two circuit elements are selected, it is known as Nested DC Sweep Analysis.
Given below is a brief description of the parameters provided in the above window.
Sweep Variable Allows setting either temperature or component parameter as the sweep variable, while conducting analysis. Select either Temperature or Component parameter from the drop down list.
For analysis of a single component - point the cursor to the desired component on the workspace and press the left mouse button. The component name, parameter name and parameter value get loaded. Use the drop-down list for Paramter name to choose the desired component's parameter.
For analysis of two components - point the cursor to the desired component on the workspace and press the left mouse button. Click FILL COMPO(1) button to load the first component. Repeat the process and click FILL COMPO(2) to load the second component. The component name, parameter name and parameter value get loaded, in both cases. Use the drop-down list for Paramter name to choose the desired component's parameter.
Start Value, End Value, Steps The difference between start and end values denotes the number of outputs of analysis to the Waveform Viewer (If Display Diagram option is checked). Step denotes the incremental factor of the scale.
Sweep Mode Allows choosing between linear and logarithmic sweep modes. Select either Linear or Logarithmic from the drop down list. Logarithmic requires both start and end values of the sweep variable greater than zero. The end value may be less than start value - in this case the sweep variable will be decremented. Several rounds of analysis may be done with various component parameters set for each component.
Display Waveform Displays the simulated result as a diagram, if enabled.
Click ACCEPT button to save the valuesand return to the Analysis node..