Deep Dive: E6C05
The correct answer is D: CMOS. Which of the following digital logic families has the lowest power consumption is CMOS. CMOS has very low power consumption. For amateur radio operators, this is important for digital circuits. Understanding this helps when selecting logic families.
Why Other Answers Are Wrong
Option A (Schottky TTL): Incorrect. Schottky TTL has higher power consumption - CMOS has lowest. Schottky TTL isn't lowest. Option B (ECL): Incorrect. ECL has higher power consumption - CMOS has lowest. ECL isn't lowest. Option C (NMOS): Incorrect. NMOS has higher power consumption - CMOS has lowest. NMOS isn't lowest.
Exam Tip
Lowest power consumption logic family = CMOS. Think 'C'MOS = 'C'onserves 'M'ost 'O'f 'S'upply (lowest power). CMOS has very low power consumption. Not Schottky TTL, not ECL, not NMOS - just CMOS.
Memory Aid
Lowest power consumption logic family = CMOS. Think 'C'MOS = 'L'owest 'P'ower. CMOS has very low power consumption. Important for digital circuits.
Real-World Example
Digital logic families: CMOS has the lowest power consumption. CMOS only consumes power during switching, making it very power-efficient. This is the family - CMOS has lowest power consumption.
Source & Coverage
Question Pool: 2024-2028 Question Pool
Subelement: E6C
Reference: 2024-2028 Question Pool · E6 - Circuit Components
Key Concepts
Verified Content
Question from the official FCC Extra Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the E6C topic.