
Monte Carlo Analysis 13
-11
• Place the analog ground using the AGND symbol.
• To connect the symbols, use Wire from the Draw menu.
• To move values and/or reference designators, click the
value or reference designator to select it, then drag it to the
new location.
Definin
component values
Define the component values as shown in Figure 13-5. For the
pressure sensor, you need to do the following:
• Change the resistor values for R3, R5, R6, and R7 from their
1K default.
• Set the DC value for the V1 voltage source.
To chan
e resistor values
1
Double-click the value label for a resistor symbol.
2
Type the new value. Depending on the resistor you are
changing, set its value to one of the following (refer to
Figure 13-5).
3
Repeat steps 1
-2 for each resistor symbol in your schematic.
To set the DC value for the V1 source and make it
visible
1
Double-click the V1 source symbol.
2
In the Edit Attributes dialog box, double-click DC=.
3
In the Value text box, type
1.35v.
If you are
chan
in
this resistor...
Type this...
R3 {1k*(1+P*Pcoeff/Pnom)}
R5 2k
R6 470
R7 25
or press C+W
Note
Because the Meter
source is used to measure
current, it has no DC value
and can be left unchan
ed.
Note
The value for R3—
{1k*(1+P*Pcoeff/Pnom)}—is
an expression that represents
linear dependence of
resistance on pressure. To
complete the definition for R3,
ou will create and define
lobal parameters for Pcoeff,
P, and Pnom later on in this
tutorial.
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