COMPUTER SCIENCE AND ENGINEERING
DIGITAL LOGIC
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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TTL
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CMOS
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ECL
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JFET
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Detailed explanation-1: -ECL is both the fastest logic family and has the simplest internal structure of modern logic families, but like other bipolar-only families it has a not insignificant power draw. It is also incompatible with other logic families due to its signal voltages.
Detailed explanation-2: -ECL: Fastest logic circuit available. Highest power consumption. Do not operate in the saturation region.
Detailed explanation-3: -Detailed Solution. LEDs are most efficient light sources. Their power consumption is very less, and it is 50% less than that of CFLs and fluorescent lamps for the same amount of light.
Detailed explanation-4: -Answer. ECL is about the fastest, and CMOS the lowest power.It is fastest digital logic family. Its greatest disadvantage is greater power dissipation.
Detailed explanation-5: -Average Power Dissipation = Vcc * ICCT. So for TTL like logics family, power dissipation does not depend on frequency of operation, and for CMOS the power dissipation depends on the operation frequency. Power Dissipation is an important metric for two reasons.