cmos nor gate

CMOS NOR GATE:- Atwo input NOR gate consists of 2ntype in parallel and 2ptype in series. when all the inputs are LOW,both pchannel units are ONand both nchannel units are OFF. The output is coupled with VDDand goes to the highstate. If any input is HIGH,the associated pchannel transistor is turned OFF and the associated nchannel turns ON,connecting the output to the ground causing a low-level output.