Define following terms related to logic families : (i) Noise Margin (ii) FAN-OUT (iii) Propagation delay (iv) Power dissipation

Define following terms related to logic families : (i) Noise Margin (ii) FAN-OUT (iii) Propagation delay (iv) Power dissipation
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1 Answer

Answer :

i) Noise immunity is measured in terms of noise margin.

High state Noise margin = VNH = VOH(min) - VIH(min)

Low state Noise margin = VNL = VIL(max) - VOL(max)

i) The fan-out is defined as the maximum number of logic inputs that an output can

Drive reliably.

ii) Propagation delay is defined as

 tPLH Delay time in going from logical 0 to logical 1 state (LOW to HIGH)

tPHL Delay time in going from logical 1 to logical 0 state (HIGH to LOW)

iii) Average power dissipation is defined as PD(avg) = ICC(avg) * VCC
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