Digital Electronics - Logic Families and Their Characteristics

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Exercise

General Questions
True or False

"You cannot shake hands with a clenched fist."

- Indira Gandhi

41.

What is the standard TTL noise margin?

A.	5.0 V
B.	0.0 V
C.	0.8 V
D.	0.4 V

42.

How can ECL have both a NOR and an OR output?

A.	ECL does not have this feature.
B.	They are simply the inverse of each other.

43.

Which logic family is characterized by a multiemitter transistor on the input?

A.	ECL
B.	CMOS
C.	TTL
D.	None of the above

44.

How is the speed–power product of a logic family determined?

A.	The propagation delay in s is multiplied by the power dissipation in mW.
B.	The propagation delay in ms is multiplied by the power dissipation in W.
C.	The propagation delay in ns is multiplied by the power dissipation in mW.
D.	The propagation delay in ns is multiplied by the power dissipation in W.

45.

The problem of the V_OH(min) of a TTL IC being too low to drive a CMOS circuit and meet the CMOS requirement of V_IH(min) is usually easily overcome by:

A.	adding a fixed voltage-divider bias resistive network at the output of the TTL device
B.	avoiding this condition and only using TTL to drive TTL
C.	adding an external pull-down resistor to ground
D.	adding an external pull-up resistor to V_CC