[amp_mcq option1=”nMOS” option2=”CMOS” option3=”pMOS” option4=”BiCMOS” correct=”option3″]
The correct answer is CMOS.
CMOS (Complementary Metal Oxide Semiconductor) is a type of integrated circuit (IC) that uses both n-type and p-type MOSFETs (metal-oxide-semiconductor field-effect transistors) to create complementary pairs. CMOS circuits are known for their high input impedance, low power consumption, and high speed.
nMOS (n-channel metal oxide semiconductor) is a type of MOSFET that uses an n-type semiconductor as its channel. nMOS transistors are typically used as switches in digital circuits.
pMOS (p-channel metal oxide semiconductor) is a type of MOSFET that uses a p-type semiconductor as its channel. pMOS transistors are typically used as switches in digital circuits.
BiCMOS (Bipolar-CMOS) is a type of IC that uses both bipolar junction transistors (BJTs) and MOSFETs. BiCMOS circuits offer the best of both worlds, combining the high speed of BJTs with the low power consumption of MOSFETs.
In conclusion, CMOS has high input resistance because it uses complementary pairs of n-type and p-type MOSFETs. These complementary pairs cancel each other out, resulting in a very high input impedance.