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https://designers-guide.org/forum/YaBB.pl Simulators >> Circuit Simulators >> S,Y,Z-parameter measurement https://designers-guide.org/forum/YaBB.pl?num=1207735294 Message started by Pavel on Apr 9th, 2008, 3:01am |
Title: S,Y,Z-parameter measurement Post by Pavel on Apr 9th, 2008, 3:01am Hello, In my design I need to do long transition simulation and control 2 nodes A and B. In working mode that interests most of the blocks conected to A and B are in powerdown, but influence nodes A and B by their impedances. If I generate full netlist, simulation will continue several days. So, I want to replace non-functional blocks by verilog-A models. For it I need to characterize theirs input impedances. Eldo allows this possibility, providing so-called "PORT"-feature, that permits to extract Z, X, Y - parameters. But unfortunately, documantation isn't clear. My task is as follows. I have blackbox with only interface pin AAA. It has complicated architecture, but finally inside there is connection to ground. I want to extract its Z parameters. What could be my setup. I tried with following one (very simple), trying to measure the value of resistor. Code:
File test_param_y.par looks like Code:
Maybe somebody did it already in Spectre. How setup should be done? Thanks in advance. Pavel. |
Title: Re: S,Y,Z-parameter measurement Post by Pavel on Apr 9th, 2008, 4:45am Resolved. Only one source at port in is needed. V1 in 0 iport=1 rport=50 Source Vin in 0 0 AC 1 must be suppressed. Regards. Pavel. |
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