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3.8 Pole/Zero Analysis 313
option name
Protocol
default value
Inherited[AnalogInsydes]
standard Analog Insydes protocol
specification (see Section 3.14.5)
Option for RootLocusByQZ.
See also: PolesAndZerosByQZ (Section 3.8.3), RootLocusPlot (Section 3.9.5),
UseExternals (Section 3.14.7).
Examples
Load Analog Insydes.
Read in a PSpice netlist
and small-signal data.
Set up system of symbolic
AC equations.
Get the design-point value
of Cbc$Q$T5.
Calculate root locus of the
circuit as Cbc$Q$T5 is
varied from pF to pF
in steps of pF.
In[1]:= AC, ElementValues −> Symbolic]
Out[3]= DAEAC, 18 18
In[4]:= Cbc$Q$T5 /. GetDesignPoint[mnabuffersym]
Out[4]= 8.39 10 12
In[5]:= rloc = RootLocusByQZ[mnabuffersym, V$99,
{Cbc$Q$T5, 5.0*^−12, 50.0*^−12, 5.0*^−12}];