Exercise: Integrated Circuit Logic Families

Questions for: Integrated Circuit Logic Families

What type of logic circuit is shown below and what logic function is being performed?

A:
It is an NMOS AND gate.
B:
It is a CMOS AND gate.
C:
It is a CMOS NOR gate.
D:
It is a PMOS NAND gate.
Answer: C
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Refer the given figure. Which of the following describes the operation of the circuit?

A:
A LOW input turns Q1 and Q3 on; Q2 and Q4 are off.
B:
A LOW input turns Q1 and Q4 off; Q2 and Q3 are on.
C:
A HIGH input turns Q1, Q2, and Q3 off, and Q4 is on.
D:
A HIGH input turns Q1, Q2, and Q4 on; Q3 is off.
Answer: C
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Refer to the given figure. What type of output arrangement is being used for the output?

A:
Complementary-symmetry
B:
Push-pull
C:
Quasi push-pull
D:
Totem-pole
Answer: D
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Which of the logic families listed below allows the highest operating frequency?
A:
74AS
B:
ECL
C:
HCMOS
D:
54S
Answer: B
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A "floating" TTL input may be defined as:
A:
unused input that is tied to Vcc through a 1 k resistor.
B:
unused input that is tied to used inputs.
C:
unused input that is tied to the ground.
D:
unused input that is not connected.
Answer: D
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