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[SOLVED] What is wrong with this SPICE deck?

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marcekowalski

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Apologies, I have been away from the tool for a decade and am simply trying to get the die-side look-in impedance from the die side with the BGA shorted from a subckt model. Hoping one of you exerts out there has sharper eyes than mine:

*AC Impedance plotting
.include "./SPICE-Netlist.sp"

Xpkg VDD1P_die VDD_NEG_R_die VSS_TAB_die VDD1P_BGA VDD_NEG_R_BGA TAB_VSS_BGA cMain

Isrc VDD1P_die VSS_TAB_die ac 1
V_VDD_NEG_R_die VDD_NEG_R_die 0 0
V_VDD1PBGA VDD1P_BGA 0 0
VDD_NEG_R_BGA VDD_NEG_R_BGA 0 0
V_TAB_VSS_BGA TAB_VSS_BGA 0 0

*
* ANALYSIS
.AC LIN 1000 0 2G

*
* VIEW RESULTS
.PRINT AC VM(Isrc)
*
.PROBE AC VM(Isrc)
.options nomod
.END
 

dick_freebird

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It might help if you included any error messages or
log file output.

But your AC sweep maybe doesn't like 0 frequency?
Try 1Hz for the start freq instead.
 

marcekowalski

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Thanks,

Problem seems to be flavor-specific ability to handle my subcircuit. Coolspice hangs, writes no output and consumes no CPU cycles. LTSpice produces reasonable results, but I am still trying to figure out how to get it to plot the magnitude of a complex number, instead of plotting the real and imaginary parts seperately.

Marc
 

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