Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is__________________?
Correct answer: C. ECL
- A. TTLAS
- B. CMOS
- C. ECL
- D. TTLLS
Explanation
ECL uses non-saturating transistor operation, giving it very small switching delays and suitability for frequencies above 100 MHz. TTL and ordinary CMOS families are generally slower in this classic comparison.
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