User`s guide

Noise Analysis 10
-13
About noise units
Example
You can run a noise analysis on the circuit shown in Figure 10-1
on page 10-6.
To run a noise anal
y
sis on the example:
1
In Schematics, open the
example.sch circuit provided
with your MicroSim programs in the
Examples\Schemat\Example subdirectory.
2
From the Analysis menu, select Setup.
3
Clear the check boxes for the Transient and Temperature
analyses.
4
Click AC Sweep.
5
Select (
✓) the Noise Enabled check box.
These are the existing settings for the noise analysis parameters:
These settings mean that PSpice A/D will calculate noise
contributions and total output noise at net OUT2 and equivalent
input noise from V1.
This type of noise output
variable...
Is reported in these
units...
Device contribution of the form Nxxx
Total input or output noise of the form
V(ONOISE) or V(INOISE)
Output Voltage V(OUT2)
I/V Source V1
Interval 30
volts()
2
Hz()⁄
volts()Hz()⁄
For a discussion of the Interval
parameter, see pa
g
e 10-11.