Logic Families and Their Characteristics - General Questions (5)

Directions to Solve

Logic Families and Their Characteristics - General Questions

33.

Which of the following summarizes the important features of emitter-coupled logic (ECL)?

A.	low noise margin, low output voltage swing, negative voltage operation, fast, and high power consumption
B.	good noise immunity, negative logic, high-frequency capability, low power dissipation, and short propagation time
C.	low propagation time, high-frequency response, low power consumption, and high output voltage swings
D.	poor noise immunity, positive supply voltage operation, good low-frequency operation, and low power

Answer: Option A

Explanation:

No answer description available for this question.

34.

If all inputs to a TTL NAND gate are low, what is the ON, OFF condition of each transistor in the circuit?

A.	Q1-ON, Q2-OFF, Q3-ON, Q4-OFF
B.	Q1-ON, Q2-ON, Q3-OFF, Q4-OFF
C.	Q1-OFF, Q2-OFF, Q3-ON, Q4-ON
D.	Q1-OFF, Q2-ON, Q3-OFF, Q4-ON

Answer: Option A

Explanation:

No answer description available for this question.

35.

Using the schematic diagram of a TTL NAND gate, determine the state of each transistor (ON or OFF) when all inputs are high.

A.	Q1-ON, Q2-OFF, Q3-ON, Q4-OFF
B.	Q1-ON, Q2-ON, Q3-OFF, Q4-OFF
C.	Q1-OFF, Q2-OFF, Q3-ON, Q4-ON
D.	Q1-OFF, Q2-ON, Q3-OFF, Q4-ON

Answer: Option D

Explanation:

No answer description available for this question.

36.

Why is a decoupling capacitor needed for TTL ICs and where should it be connected?

A.	to block dc, connect to input pins
B.	to reduce noise, connect to input pins
C.	to reduce the effects of noise, connect between power supply and ground

Answer: Option C

Explanation:

No answer description available for this question.

37.

An open collector output can ________ current, but it cannot ________.

A.	sink, source current
B.	source, sink current
C.	sink, source voltage
D.	source, sink voltage

Answer: Option A

Explanation:

No answer description available for this question.

38.

What is the difference between the 54XX and 74XX series of TTL logic gates?

A.	54XX is faster.
B.	54XX is slower.
C.	54XX has a wider power supply and expanded temperature range.
D.	54XX has a narrower power supply and contracted temperature range.

Answer: Option C

Explanation:

No answer description available for this question.

39.

What is the range of invalid TTL output voltage?

A.	0.0â€“0.4 V
B.	0.4â€“2.4 V
C.	2.4â€“5.0 V
D.	0.0â€“5.0 V

Answer: Option B

Explanation:

No answer description available for this question.

40.

As a general rule, the lower the value of the speed–power product, the better the device because of its:

A.	long propagation delay and high power consumption
B.	long propagation delay and low power consumption

Answer: Option B

Explanation:

No answer description available for this question.

1
2
3
4
5
6