Changes

A DC Sweep Test is a set of DC Bias [[Tests]] performed successively, during which the value of a parameter (called the sweep variable) is varied. At the end of the simulation, a set of data are generated that correspond to your circuit's response to the different values of the sweep variable. Unlike the DC Bias Test, you must specify the [[parameters]] of the DC Sweep Test before you can execute it. At the top of the Settings Dialog, there are two dropdown lists labeled "Source" and "Property". The source can be the name of a constant voltage or current source. The property can be the source's "DC" value. The "Start Value", "End Value" and "Step Value" specify the range and intervals for the source. The analysis starts at the start value, stops at the end value, and increments at intervals equal to the step value. Besides the source voltage or current, the sweep variable can also be a temperature or a device parameter or a model parameter. The input is swept through a set of values, and for each value the DC operating point of the circuit is calculated. That is, all capacitors are opened, all are inductors shorted, and all voltage and current sources except for the input source are set to their initial values. If you want a temperature sweep, the source must be specified as "temperature".  The default results of a DC sweep test consist of plots of the voltage across each voltmeter and the current through each ammeter in the circuit. You can customize the results by choosing any node voltage or device current using "Preset Graph Plots" and "Preset Table Plots". To learn how you can define output voltages or currents anywhere in your circuit, refer to the section on "Setting Up Circuit Observables". You may also place a voltage probe or a current probe in your circuit to plot its signal as a function of the sweep variable. To learn more about probes, see the section on "Using Probes or Meters as Observables".