How I size my CMOS Level shifter

Let's say I am using TSMC 180nm I want to convert the incoming level from 1.8 to 2.5 volts, so using Level shifter attached in Figure. Then How can start sizing of this level shifter and how I set frequency ..

MN1，MN2，MP1，MP2用I/O device，
inverter(VDDL)用core device,
length一般选最小；
在IN加上方波（频率为你想要的），跑tran分析，
看输出能否到0/VDDH。

two PMOS(MP1,Mp2) size should be much smaller than NMOS(MN1, MN2)

two PMOS(MP1,Mp2) size should be much smaller than NMOS(MN1, MN2)

and simulate corners including SF and FS.

nice.right.

Hi,, Thanks ..
But in general mobility of NMOS is greater than PMOS so in this wway the size of PMOS devices should be high than NMOS ...is it..?

你先设定一组参数，跑个仿真看看结果如何。
回复 7# terebin4

谢谢分享