Difficulty: Easy
Correct Answer: CMOS
Explanation:
Introduction / Context:Portable and battery-backed designs need logic that consumes minimal power when idle and scales well with supply voltage. The choice of logic family directly impacts battery life and thermal performance.
Given Data / Assumptions:
Concept / Approach:CMOS (complementary MOS) uses complementary p-channel and n-channel devices; ideally, only switching events consume dynamic power, while static power is near zero (aside from leakage). That makes CMOS the dominant choice for low-power digital circuits. Pure NMOS/PMOS families draw static current through load devices, raising idle power.
Step-by-Step Solution:Compare static power: CMOS ≪ NMOS/PMOS.Consider supply range and noise margins: CMOS scales to low voltages common in battery systems.Select CMOS as the best fit for battery operation.
Verification / Alternative check:Modern microcontrollers, SoCs, and memories are overwhelmingly CMOS due to power efficiency and integration density.
Why Other Options Are Wrong:NMOS/PMOS consume higher static power; “MOS” is non-specific; BiCMOS can optimize speed/analog features but not minimum static power.
Common Pitfalls:Overlooking leakage in deep-submicron CMOS; although nonzero, it remains far below the static currents of classic NMOS/PMOS logic families.
Final Answer:CMOS
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