User`s guide

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
g
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
g
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
g
in
g
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
g
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,
y
ou will create and define
g
lobal parameters for Pcoeff,
P, and Pnom later on in this
tutorial.