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Examples<br />

Tutorial—High Impedance Fault Detection of a PLL Circuit<br />

Looking at these results, the highest detection reported points to the node<br />

XPLL.XLD.XCNT.XD00.X2.XC.X.<br />

13. Plot the impedance of this node (in a similar way to step 9) and try to identify the cause<br />

of such a high impedance value.<br />

Edit the main netlist file HiZ_PLL.cir in your preferred text editor, and add the<br />

following plot command:<br />

.plot tran IMP(xpll.xld.xcnt.xd00.x2.xc.x)<br />

Rerun the simulation in Eldo:<br />

<strong>eldo</strong> HiZ_PLL.cir<br />

14. After the simulation is complete, launch EZwave and open the generated output file<br />

HiZ_PLL.swd:<br />

ezwave HiZ_PLL.swd<br />

A new waveform is displayed, IMP(XPLL.XLD.XCNT.XD00.X2.XC.X):<br />

Eldo® User's Manual, 15.3 1367

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