P-type metal-oxide-semiconductor. A type of MOSFET where the channel between the source and drain is doped with p-type material, meaning it conducts using holes rather than electrons. It turns on when a negative voltage relative to the source is applied to the gate. While early integrated circuits used pure pMOS logic, it is now almost exclusively paired with nMOS transistors to form CMOS logic.
In this inverter layout, the pMOS is placed in the n-well at the top connected to VDD.
Also heard as
- p-channel MOSFET
- pMOSFET
Related terms
nMOS
A type of field-effect transistor that uses negatively charged electrons as the primary charge carriers.
CMOS
Complementary metal-oxide-semiconductor is the dominant fabrication technology for integrated circuits.
MOSFET
A metal-oxide-semiconductor field-effect transistor is a voltage-controlled switch used to amplify or switch electronic signals.
pMOSFET
A metal-oxide-semiconductor field-effect transistor with a p-type conduction channel.