Mar 6, 2006 #1 currentmirror2000 Member level 4 Joined Dec 21, 2004 Messages 77 Helped 6 Reputation 16 Reaction score 1 Trophy points 1,288 Activity points 798 hi all, i'm trying to plot vth vs L in candence, but what i can select is only vtho, i.e. MP("NM0" "vtho"); the vtho is independent of biasing. what i did is to sweep L in parametric simulation and plot MP("NM0" "vtho") as the output. can cadence output vth instead of vtho by sweeping L? is there anything wrong in my simulation, because even the vtho output curve looks very weired. thanks in advance! c.m.
hi all, i'm trying to plot vth vs L in candence, but what i can select is only vtho, i.e. MP("NM0" "vtho"); the vtho is independent of biasing. what i did is to sweep L in parametric simulation and plot MP("NM0" "vtho") as the output. can cadence output vth instead of vtho by sweeping L? is there anything wrong in my simulation, because even the vtho output curve looks very weired. thanks in advance! c.m.
Mar 6, 2006 #2 Fom Advanced Member level 2 Joined Mar 10, 2004 Messages 630 Helped 84 Reputation 168 Reaction score 34 Trophy points 1,308 Location Taiwan Activity points 4,463 You can plot Vgs at max gm using calculator special functions. Use DC analysis with Vgs sweep and parametric analysis sweeping L as parameter. Then plot xmax(deriv(Id)). It will plot Vgs at gm max vs. L.
You can plot Vgs at max gm using calculator special functions. Use DC analysis with Vgs sweep and parametric analysis sweeping L as parameter. Then plot xmax(deriv(Id)). It will plot Vgs at gm max vs. L.