hspice 极零点分析 出现warning
**warning** underflow 1 time(s) in pole/zero analysis
**warning** underflow 1 time(s) in pole/zero analysis
**warning** underflow 1 time(s) in pole/zero analysis
**warning** underflow 1 time(s) in pole/zero analysis
.............
input = 0:vin1 output = v(6)
poles (rad/sec) poles ( hertz)
real imag real imag
-4.77573x 0. -760.081k 0.
-468.830x 0. -74.6166x 0.
-492.670x 0. -78.4108x 0.
-8.63344g 0. -1.37405g 0.
-14.3726g 0. -2.28748g 0.
zeros (rad/sec) zeros ( hertz)
real imag real imag
-503.296x -588.089k -80.1021x -93.5973k
-8.08488g 446.764k -1.28675g 71.1047k
-81.1766g 58.4049g -12.9197g 9.29542g
-81.1805g -58.4014g -12.9203g -9.29488g
198.490g 0. 31.5906g 0.
***** constant factor = 163.465n
这些 warning 是什么意思? 打印的极零点的值还准不准确?
我也遇到了啊
而且这个复数极零点怎么出现啦 。 折叠共源共栅OTA的
poles (rad/sec) poles ( hertz)
**********************************************************************
real imag real imag
-12.4336x 0. -1.9789x 0.
-3.9217g -3.9342g -624.1544x -626.1489x
-3.9217g 3.9342g -624.1544x 626.1489x
-7.9060g 0. -1.2583g 0.
-11.9800g 0. -1.9067g 0.
-12.4184g 0. -1.9765g 0.
-16.3111g 0. -2.5960g 0.
node=vid real= -3.8509E-16 imaginary= 1.3490E-16
**warning** underflow 1 time(s) in pole/zero analysis
zeros (rad/sec) zeros ( hertz)
**********************************************************************
real imag real imag
-3.8427g 6.8541g -611.5911x 1.0909g
-3.8427g -6.8541g -611.5911x -1.0909g
-7.5648g 0. -1.2040g 0.
-11.9473g 0. -1.9015g 0.
-16.3085g 0. -2.5956g 0.
236.1106g 0. 37.5782g 0.
同问啊!
ddddd
依然無解啊
I don't understand it.
非常感谢 !
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