Logic Families and Their Characteristics - General Questions (4)

Directions to Solve

Logic Families and Their Characteristics - General Questions

25.

Ten TTL loads per TTL driver is known as:

A.	noise immunity
B.	fan-out
C.	power dissipation
D.	propagation delay

Answer: Option B

Explanation:

No answer description available for this question.

26.

Why is the operating frequency for CMOS devices critical for determining power dissipation?

A.	At low frequencies, power dissipation increases.
B.	At high frequencies, the gate will only be able to deliver 70.7 % of rated power.
C.	At high frequencies, charging and discharging the gate capacitance will draw a heavy current from the power supply and thus increase power dissipation.
D.	At high frequencies, the gate will only be able to deliver 70.7 % of rated power and charging and discharging the gate capacitance will draw a heavy current from the power supply and thus increase power dissipation.

Answer: Option C

Explanation:

No answer description available for this question.

27.

PMOS and NMOS ________.

A.	represent MOSFET devices utilizing either P-channel or N-channel devices exclusively within a given gate
B.	are enhancement-type CMOS devices used to produce a series of high-speed logic known as 74HC
C.	represent positive and negative MOS-type devices, which can be operated from differential power supplies and are compatible with operational amplifiers
D.	None of the above

Answer: Option A

Explanation:

No answer description available for this question.

28.

The term buffer/driver signifies the ability to provide low output currents to drive light loads.

A.	True
B.	False

Answer: Option B

Explanation:

No answer description available for this question.

29.

The rise time (t_r) is the time it takes for a pulse to rise from its ________ point up to its ________ point. The fall time (t_f) is the length of time it takes to fall from the ________ to the ________ point.

A.	10%, 90%, 90%, 10%
B.	90%, 10%, 10%, 90%
C.	20%, 80%, 80%, 20%
D.	10%, 70.7%, 70.7%, 10%

Answer: Option A

Explanation:

No answer description available for this question.

30.

The word "interfacing" as applied to digital electronics usually means:

A.	a conditioning circuit connected between a standard TTL NAND gate and a standard TTL OR gate
B.	a circuit connected between the driver and load to condition a signal so that it is compatible with the load
C.	any gate that is a TTL operational amplifier designed to condition signals between NMOS transistors
D.	any TTL circuit that is an input buffer stage

Answer: Option B

Explanation:

No answer description available for this question.

31.

Why is a pull-up resistor needed when connecting TTL logic to CMOS logic?

A.	to increase the output LOW voltage
B.	to decrease the output LOW voltage
C.	to increase the output HIGH voltage
D.	to decrease the output HIGH voltage

Answer: Option C

Explanation:

No answer description available for this question.

32.

Why is a pull-up resistor needed for an open collector gate?

A.	to provide Vcc for the IC
B.	to provide ground for the IC
C.	to provide the HIGH voltage
D.	to provide the LOW voltage

Answer: Option C

Explanation:

No answer description available for this question.

1
2
3
4
5
6