Hi guys,
I am trying using the CMOS device in the .mod library. The device I choose has 300ps slew time. Is the slew time is the raise/fall time, right?
I ran the interactive simulation by using the oscilloscope. From the plot, I can measure the raise/fall time is about 600ps. It is different from the slew time in the model. In the simulation, there is only one driver, no transmission line and no reciever.
is there anyone who can tell me why?
Thanks,
Yihong
There are various techniques for defining rise time. Typically the time from 10% to 90% of the final value is used. Sometimes 20% to 80% is used.
Slew rate is typically in units of volts/second. Slew time is an odd term from my perspective.