Question

T/F - In a CMOS logic gate, the role of a p-type transistor is to pull the output signal up to "1"

Answer 1

The main answer is true, the p-type transistor in a CMOS logic gate indeed pulls the output signal up to "1" when the gate input is low.

Step-by-step explanation:

The true/false statement in question is: In a CMOS logic gate, the role of a p-type transistor is to pull the output signal up to "1". The main answer to this question is true. CMOS stands for Complementary Metal-Oxide Semiconductor. A CMOS logic gate uses both p-type and n-type transistors to implement logic functions. The role of the p-type transistor (also called PMOS) in CMOS technology is to pull the output high towards the power supply level, which is considered a logical "1" when the gate input is low. On the other hand, the n-type transistor (also called NMOS) pulls the output low towards ground, which is a logical "0", when the gate input is high.In a typical CMOS inverter, which is the simplest form of a CMOS logic gate, when the input is low (0), the PMOS is on (conducting), which means it connects the output to the power supply, thus pulling it up to a high state or a logical "1". Conversely, when the input is high (1), the NMOS is on, connecting the output to ground and pulling it down to a low state or a logical "0".In conclusion, a p-type transistor in a CMOS logic gate does indeed pull the output high, or towards a logical "1", when it is switched on by a low voltage at its gate.