dear forum members,
I would appreciate it if anyone could help me with the following problem.
When oscillator transient simulation is performed with HSPICE and SPECTER, oscillator settling time differs as shown below.
The left figure is the result of HSPICE simulation and the right figure is the result of SPECTRE simulation.
However, even if I perform SPECTRE simulation longer than HSPICE simulation, SPECTRE does not stabilize.
I wonder why the two simulation results are different.
SPECTRE simulation setup is defaults and HSPICE simulation options are as follows.
.options post=3 nomod
+ method=gear nowarn
+ accurate=1
+ measdgt=4
+ probe
+ method=gear nowarn
+ accurate=1
+ measdgt=4
+ probe
Thanks