gargoyle
Junior Member level 3
hello all:
i simulate a cmos ring oscillator use hspice, as in the paper said, the frequency could reach to 3-4g under 0.35um technology
but there is a strange phenomena that in some control voltage, the output
wave change after some time, for 3.3 to 6g , i do not know why. and if i chage
the .tran step to 0.001ns, the frequency directly to 7g. i really confused.
my friend recommend me to run it under spectr rf,, but i only haVE HSPICE
to use.
dose any body know why ?
thank you [/u]
i simulate a cmos ring oscillator use hspice, as in the paper said, the frequency could reach to 3-4g under 0.35um technology
but there is a strange phenomena that in some control voltage, the output
wave change after some time, for 3.3 to 6g , i do not know why. and if i chage
the .tran step to 0.001ns, the frequency directly to 7g. i really confused.
my friend recommend me to run it under spectr rf,, but i only haVE HSPICE
to use.
dose any body know why ?
thank you [/u]