waosai
Member level 2
Hi, I'm using hspice to simulate the CMRR of opamp. The method I used is from P.E.Allen's book. The configuration is shown in the picture.
The difference is I used two vcvs to replace the original independant source. I think this is equivalent. But when I run it, hspice said "**error** inductor/voltage source loop found ...". I think it must come from the input "vi” and the two vcvs.
But I can't figure it out.
Anybody can tell me where the problem is? Thanks!
The difference is I used two vcvs to replace the original independant source. I think this is equivalent. But when I run it, hspice said "**error** inductor/voltage source loop found ...". I think it must come from the input "vi” and the two vcvs.
But I can't figure it out.
Anybody can tell me where the problem is? Thanks!