Final answer:
The statement is false; in a CMOS logic gate, one type of transistor is typically on while the other is off during operation, rather than both being on simultaneously. This complementary arrangement minimizes power consumption.
Step-by-step explanation:
The statement is False. In a CMOS logic gate, it is not necessary for at least one n-type transistor and one p-type transistor to be turned ON simultaneously for the gate to function correctly.
CMOS (Complementary Metal-Oxide-Semiconductor) technology utilizes both p-type and n-type metal-oxide-semiconductor field-effect transistors (MOSFETs) to create logic functions. The term "complementary" indicates that the CMOS technology uses both p-type and n-type transistors in a complementary way.
In a CMOS gate, when it is active and performing its logic function, one type of transistor generally conducts while the other type is off, depending on the input signal. For instance, in a CMOS inverter, which is the simplest form of a CMOS logic gate, when the input is high (logic 1), the n-type transistor is ON (conducting), and the p-type transistor is OFF (non-conducting).
Conversely, when the input is low (logic 0), the n-type transistor switches OFF, and the p-type transistor turns ON. This push-pull arrangement ensures that there is always a low-resistance path in one direction (source to output or output to source), while the other direction remains high-resistance.
This is designed to minimize power consumption, as current would only flow during the switching transient and not during the static operation of the gate.
Therefore, the classic operation of CMOS logic gates involves one transistor being on while the other is off, depending on the logic level of the input signal.