Divider Monte Carlo Analysis

The Monte Carlo analysis is used to answer the question, What percentage of my circuits will achieve or exceed my specifications Usually you would run a Worst Case analysis to see if all of the circuits pass the specifications. If they all pass, there is no need to run the Monte Carlo analysis. If they do not all pass, the Monte Carlo analysis is used to estimate what percentage of the circuits will pass. 

Voltage Divider Gain Analysis with Uniform Tolerance Distribution 

We will run a Monte Carlo analysis on the voltage divider circuit previously described. The circuit and parts are repeated below  

It is important to note that the resistor part used is Rspcnt and not R5gauss. The model Rspcnt has a 5% uniform distribution. We would like to find the gain of this circuit, so we must set up an AC Sweep. Select PSpke and then New Simulation Profile from the Capture menus, enter a name for the profile, and then click the Create button. Select theAC Sweep/Nolse Analysis type. Fill in the parameters as shown  

Ganaral Anaiyais fndudaFlas Librorias[Stimulus [Option ] DatoCodaction Prifcu Window -AC Swap Typo—  

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The Performance Analysis can be used in conjunction with the Monte Carlo analysis to view the distribution of a parameter as a function of device tolerances. For this example, we will display how the spread of the gain V(Vo)/V(Vl) varies with resistor tolerances. We will use the voltage divider of the previous section and 5% resistors with a uniform distribution ... 

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