Q. Which of the following summarizes the important features of emitter- coupled logic (ECL)?

• (A) low noise margin, low output voltage swing, negative voltage operation, fast, and high power consumption
• (B) good noise immunity, negative logic, high- frequency capability, low power dissipation, and short propagation time
• (C) low propagation time, high- frequency response, low power consumption, and high output voltage swings
• (D) poor noise immunity, positive supply voltage operation, good low- frequency operation, and low power