FreeLists / si-list / [SI-LIST] A Hspice question about current on W-element

[xuzhengrong <Zhengrong.Xu@xxxxxxxxxx>]

Hi all,
I recently used Hspice to observe the current on a W-element.

W-element is a four-ports element as a distributed transmission line. 

For example,  

W1  in  gnd_in  out  gnd_out  rlgcfile=w1.rlgc  L=1,  assuming that gnd_in
and gnd_out all connect to 0.

I used .print i1(W1) i2(W1) i3(W1) i4(W1) to observe corresponding i(in)
i(gnd_in) i(out) i(gnd_out).

I(gnd_in) is the return current of i(in), so i(gnd_in) should be the inverse
phase of i(in). The same to i(out) and i(gnd_out).

The simulation results show that i1(W1)= - i2(W1) (as we have expected), but
i3(W1)= i4(W1) surprisingly.

Why is i4(W1) equal to i3(W1) instead of i4(W1)=-i3(W1) in this simulation?

Is anything wrong about my idea?

Appreciate anything about it. 

 

Best Regards,

Zhengrong

 



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