Technology identification: Complementary metal–oxide–semiconductor (CMOS) logic uses MOSFET devices, not bipolar junction transistors (BJTs). Evaluate the claim that CMOS uses bipolar transistors instead of MOSFET.

Introduction / Context:CMOS is defined by its use of complementary pairs of MOSFETs (nMOS and pMOS). Bipolar technologies (TTL/ECL) rely on BJTs and have different characteristics for speed, power, and fanout. The question tests recognition of device technology behind CMOS.

Given Data / Assumptions:

• CMOS stands for complementary metal–oxide–semiconductor.
• Core switching elements are MOSFETs (field-effect transistors).
• Bipolar logic families use BJTs rather than MOSFETs.

Concept / Approach:CMOS logic pairs p-channel and n-channel MOSFETs to implement low static power gates with rail-to-rail swings. BJTs appear in bipolar families (e.g., TTL), not in CMOS gate cores. While mixed-signal ICs may integrate bipolar for analog blocks (BiCMOS), pure CMOS gates remain MOSFET-based.

Step-by-Step Solution:

Verification / Alternative check:Device cross-sections and gate schematics of CMOS inverters show a pMOS pull-up and nMOS pull-down network, confirming MOSFET usage.

Why Other Options Are Wrong:

• Correct: Would misidentify CMOS technology.
• Ambiguous / Cannot be determined: The terms are explicit and standardized.

Common Pitfalls:Confusing CMOS with BiCMOS; BiCMOS integrates both, but the claim as worded remains false for CMOS itself.

Final Answer:Incorrect