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Setting Up An Analysis
Adaptive AC Analysis Example
Performing an AC Analysis During Transient Analysis
Saving and Restarting AC Simulations
Adaptive AC Analysis Example
The following example shows the use of an adaptive AC analysis:
* S-par extraction
l1 1 1x 1e-7
r1 1x 2x 10
c1 2x 0 3e-12
T1 2x 0 3x 0 Z0=50 Td=1n
c2 3x 0 6e-12
l2 3x 4x 2e-7
r2 4x 2 8
T2 2x 0 5x 0 Z0=40 Td=1.5n
Vp 5x 0 0
c11 1 0 10p
c22 2 0 10p
L3 3x 6x 2e-7
R3 6x 5x 2
I1 0 1 iport=1 rport=50
I2 0 2 iport=2 rport=50
.extract ac yval(sdb(1,1),1.45e8)
.Ffile S sb1.s2p Hz RI
.plot ac sdb(1,1)
.ac adaptive 0.05 1e5 1e11
Specifies an adaptive AC analysis between 1.0×10 5 Hz to 1.0×10 11 Hz with a relatively small
tolerance. The magnitude of S11 is plotted in dB, and the extracted S parameters are stored in
the file sb1.s2p with the frequency in Hz. The data is stored in the form of the Real and
Imaginary parts.
Related Commands
• .AC in the Eldo Reference Manual
Related Topics
AC Analysis
Performing an AC Analysis During Transient
Analysis
Whenever a .AC command, a .TRAN command, and a .OP command containing time
specifications are in the .cir file, then an AC analysis will be performed at each of these time
points.
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Eldo® User's Manual, 15.3