निम्नलिखित लॉजिक फैमिलीज़ में से कौन सी स्टेटिक स्थितियों के तहत सबसे कम शक्ति (power) की खपत करती है?

Consider the following statements with respect to the Emitter-Coupled Logic (ECL) gate: I. Its switching speed is high. II. It provides OR and NOR logic operations. III. Its power dissipation is small compared to other logic gates. IV. Its logic levels are compatible with other logic family gates. Which of the above statements are correct?

The Emitter Coupled Logic (ECL) logic family is primarily known for its: