
629Microwave Transistors
between the positive power supply V
DD
and a reference ground potential
V
SS
. The DMD at V
GS
= 0 is normally on and acts as a current source for two
EMDs. The gates A and B of the two EMDs act as input to the logic circuit.
DMD’s gate source connection is the output. The output voltage of the two-
input NAND circuit is low only when both EMDs are turned on at their
logic high level.
14.5.2 P-Type Metal-Oxide-Semiconductor Logic
PMOS logic uses p-type MOSFETs to implement logic gates and other digi-
tal circuits. This logic also has the same four modes of operation as that for
NMOS. These are arranged in pull-up network (PUN) ...