What is the threshold value of the PMOS?

The threshold voltage (V_th) of a PMOS transistor is the gate-source voltage (V_GS) at which the transistor begins to conduct. It is typically negative, meaning the gate voltage must be lower than the source voltage to create a conductive channel. The exact value of the threshold voltage can vary based on the specific technology and fabrication process, but it generally ranges from -0.5V to -2V for most PMOS devices.