Is there any way to know poles in close loop?

[lijianheng]

Hi, All

Is there any way to know the poles without break the loop?

Thx in advance

 

[surianova]

Hi, All

Is there any way to know the poles without break the loop?

Thx in advance

if without breaking the loop, it is closed pole.

if breaking the loop, it is open pole.

 

[Sadegh.j]

Have you tried the .pz command in hspice.

 

[lijianheng]

I use both pz and ac analysis using spectre.