Sense amplifier in Cadence

[antlhem]

Hi, I am making a sense amplifier in Cadence but is not providing the right Vout. Every time I enable the sense amplifier does not change much, just outputting a voltage of 4.3V, which is very close to Vdd=5V. It suppose to output the difference of inputs multiplied by a gain (BL and NOT_BL) which are the bit lines in a memory, such as DRAM. I am attaching the diagrams I am following and the schematic and results from Cadence. Any advise on how to make the sense amplifier work correctly?

The following is the schematic from Cadence and results

 

[FvM]

Vout is expected to go to high level with BL > nBL. Why don't you apply opposite polarity or check nVout?

Not sure if you have set reasonable circuit parameters, but you should at least see a reaction.