User`s guide
17
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54 Analyzin
g
Waveforms in Probe
Analo
g
Trace Expressions
Trace expression aliases
Analog trace expressions in Probe vary from the output
variables used in PSpice A/D analyses because analog net
values can be specified by:
<output variable>[;display name]
as opposed to the <output variable> format used by PSpice A/
D. 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 PSpice A/D (by means of symbol
attribute definitions in Schematics). You can also include
intrinsic functions in expressions. The intrinsic functions
available in Probe are similar to those available for PSpice A/D
math expressions, but with some differences, as shown in
Table 17-10
. A complete list of PSpice A/D arithmetic
functions can be found in Table 3-2 on page 3-18
.
Table 17-10
Probe Analog Arithmetic Functions
Probe
Function
Description
Available in
PSpice A/
D?
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