User Guide

Monte Carlo analysis
293
Example: Monte Carlo analysis of a pressure sensor
This example shows how the performance of a pressure
sensor circuit with a pressure-dependent resistor bridge is
affected by manufacturing tolerances, using Monte Carlo
analysis to explore these effects.
Drawing the schematic
To begin, construct the bridge as shown in Figure 78.
Here are a few things to know when placing and
connecting the part:
• To get the part you want to place, from the Place
menu, choose Part.
•
To rotate a part before placing it, press R.
•
For V1 and Meter, place a generic voltage source using
the VSRC part. When you place the source for the
meter, change its name by double-clicking the part
and typing
Meter in the Reference cell in the Parts
Spreadsheet.
•
For R1-R7, place a resistor using the R part.
•
Place the analog ground using the 0 ground symbol.
Figure 78 Pressure sensor circuit.
Pspug.book Page 293 Wednesday, November 11, 1998 1:14 PM