User Guide

Chapter 13 Analyzing waveforms
364
Analog trace expressions
Trace expression aliases
Analog trace expressions vary from the output variables
used in simulation analyses because analog net values can
be specified by:
<output variable>[;display name]
as opposed to the <output variable> format used in
analyses. With this format, the analog trace expression can
be displayed in the analog legend with an optional alias.
Arithmetic functions
Arithmetic expressions of analog output variables use the
same operators as those used in simulation analyses (by
means of part property definitions in Capture). You can
also include intrinsic functions in expressions. The
intrinsic functions available for trace expressions are
similar to those available for PSpice math expressions, but
with some differences, as shown in Table 12
. A complete
list of PSpice arithmetic functions can be found in Table 10
on page 3-71.
Table 12 Analog arithmetic functions for trace expressions
Probe
function
Description
Available in
PSpice?
ABS(x) |x| YES
SGN(x) +1 (if x>0), 0 (if x=0), -1 (if x<0) YES
SQRT(x) x
1/2
YES
EXP(x)
e
x
YES
LOG(x)
ln
(x) YES
LOG10(x)
log
(x) YES
M(x) magnitude of x YES
P(x) phase of x (degrees) YES
R(x) real part of x YES
IMG(x) imaginary part of x YES
Pspug.book Page 364 Wednesday, November 11, 1998 1:14 PM