I run pz analysis in spectre for 2stage amp connected as buffer and got the pz results listed below which is very small.
I expect M level values for pole zero values.
                        Poles (Hz)
          Real                       Imaginary                 Qfactor
  1   -2.70560e-06              +/- 1.53583e-04              2.83869e+01
  2   -1.69713e+01                  0.00000e+00              5.00000e-01

For the pz sim, I use default options. Could you tell me the possible reasons for the strange results?

Thank you!