Level Shifter - IC

Your mosfets are not set correctly. The top two pmos are not moving and there is shoot-through causing current to go straight from top to earth.

Normally, the circuit works without 2 top Pmos. They are used in order to have faster rising and falling time. When clock changes, current in the same line is restricted by top Pmos and response becomes faster

You are right about mosfet sizes. This circuit with minimum sized Mosfets didn't work in Cadence. I have optimized sizes in Cadence and revised the circuit. Thanks!

Still looks the same unfortunately...Look carefully and you can see the rapid shoot-through of the dots flow in the top left and at the very bottom nmos section too. Such a shoot-through is difficult to avoid in reality and a ready made ic is an easier option for multple mosfets if we wish to avoid blowing something. Anyway.....for EC presentation and practice with such difficulties we can have fun messing....see the working pmos and no shoot-through here...good luck ... http://everycircuit.com/circuit/6207154216501248

Are you aware of your transistor sizes? 1mm width and 1nm length? Your top Pmosfets has 1nm length and 1nm width. All of your circuit is just a simulation. Impossible to realize.

In addition, if you have a solution for leakage and it works in Cadence, you can publish a journal in IEEE.

I pointed out that my presentation here is for EC viewing as practice to show how it should work without shoot-through which in practice is difficult....read that again. What is the point in your presentation of mosfets which can be seen to not operate and which show a short circuit. Note also that your settings bear no relation to real ones eg threshold and transconductance. The EC width-length settings are not meant to represent real value-for-value measurements...they are, as you mention...for simulation adjustment only, eg to adjust for Rds₍ₒₙ₎ which is not readily available on EC. My presentation shows how the circuit should look...your presentation here does not...Don't try to make EC act like Spice etc....that is not what it is for.