Which logic family provide minimum power dissipation

Electrical Engineering XYZ MCQs

Which logic family provide minimum power dissipation:

1. ECL
2. TTL
3. JFET
4. CMOS

Correct answer: 4. CMOS

Explanation:

1. ECL (Emitter-Coupled Logic): ECL consumes higher power compared to CMOS. It is known for its high-speed operation but at the cost of higher power consumption.
2. TTL (Transistor-Transistor Logic): TTL logic consumes more power than CMOS. While TTL is widely used and offers good performance, it is not as power-efficient as CMOS.
3. JFET (Junction Field-Effect Transistor): JFETs are not a logic family on their own, but they can be used in certain analog circuits. Power dissipation depends on the specific circuit and implementation, but CMOS generally outperforms JFET-based circuits in terms of power efficiency.
4. CMOS (Complementary Metal-Oxide-Semiconductor): CMOS is known for its low power dissipation. It consumes power only during the switching transitions and almost no static power when the circuit is in a stable state. This makes CMOS a preferred choice for many applications where power efficiency is crucial, such as in portable devices and low-power integrated circuits.

In summary, among the given options, CMOS logic family provides minimum power dissipation.