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Examples<br />

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

*|NET TPROG1 1.221451e-14<br />

*|I (XPLL.Xtest.Xdum1.M1.g XPLL.Xtest.Xdum1.M1 g I 0.0 10.0 10.0)<br />

*|I (XPLL.Xtest.Xdum1.M2.g XPLL.Xtest.Xdum1.M2 g I 0.0 10.0 10.0)<br />

*|S (TPROG1_1)<br />

*|P (TPROG1 I )<br />

C5 TPROG1 VSS 1.17763E-01PF<br />

C6 TPROG1_1 VSS 2.76325E-01PF<br />

C7 XPLL.Xtest.Xdum1.M1.g VSS 2.70519E-01PF<br />

C8 XPLL.Xtest.Xdum1.M2.g VSS 2.70519E-01PF<br />

R4 TPROG1 TPROG1_1 1.70333E20<br />

R5 TPROG1_1 XPLL.Xtest.Xdum1.M1.g 1.29167E-01<br />

R6 TPROG1_1 XPLL.Xtest.Xdum1.M2.g 1.29167E-01<br />

The value of R4 has been set to 1.70333E20 Ω by mistake (see the line highlighted in<br />

red). The value should be 1.70333E00 Ω, just like R1 for the backannotated node<br />

TPROG0.<br />

6. Edit the DSPF file dspf_pll_v01.dspf in your preferred text editor, change the value of<br />

R4 from 1.70333E20 to 1.70333E00. Rerun the simulation in Eldo:<br />

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

Check the PLL output period labeled PERIOD_PLL which should be approximately<br />

23ns. You should see the following message at the end of the simulation:<br />

PERIOD_PLL = 2.2853E-08<br />

7. Reopen the newly generated HiZ output file HiZ_ALL.hiz with the AMS Results<br />

Browser and verify that node TPROG1 is no longer visible (default sort by instance<br />

name):<br />

1362<br />

Eldo® User's Manual, 15.3

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