# High Speed Comparators MCQ [Free PDF] – Objective Question Answer for High Speed Comparators Quiz

1. The specially designed comparators are compatible with

A. RTL
B. MOS Logic
C. TTL
D. All of the mentioned

The specially designed comparator outperforms the op-amp type. They are optimized for the most desirable promoters like speed and accuracy. So, their output is compatible with RTL, DTL, TTL, and MOS Logic.

2. Response time of comparators is defined as

A. Time interval between input and output crossing upper threshold voltage
B. Time interval between input and output function
C. Time interval between input and output crossing threshold logic
D. Time interval between input and output crossing lower threshold voltage

The response time of the comparator is the interval between the application of an input step function and the time output crosses the logic threshold voltage.

3. The voltage level at which the comparator is saturated by a differential input equal to greater than a specified voltage is called

A. Zero output level
B. Positive output level
C. Negative output level
D. All of the mentioned

The negative output level or output low voltage is the negative dc output voltage with a comparator saturated by a differential input equal to or greater than the specified voltage.

4. When the logic level of strobe output is at zero, then the output current is called

A. Strobe terminal current
B. Strobe current
C. Strobe threshold current
D. Strobe’s bias current

The strobe current is the current out of the strobe terminal when it is of the zero logic current.

5. The strobe release time is defined as

A. Time required for output to rise to logic threshold
B. Time required for input to rise to logic threshold
C. Time required for output to rise to zero logic
D. Time required for output to rise to one logic

The strobe release time is the time required for the output to rise to the logic threshold voltage after the strobe terminal has been driven from zero to the one logic level.

6. Which of the following comparator can operate from ±15 to down to +5v supply in op-amp?

A. µA741
B. µA311
C. µA351
D. All of the mentioned

µA311 precision comparator is designed for low-level signal detection and high-level output drive capability. So, it can operate from ±15v op-amp supplies down to the logic +5v supply used for IC logic.

7. Find the comparator that has a slow response time

A. LM1414
B. µF311
C. ICL8001
D. None of the mentioned

LM1414 has a slow response time typically of 30ns, whereas µAF311 & ICL800 have a response time of 200ns and 250ns.

8. Why ICL8001 op-amp comparator is preferred for most applications?

A. Low power consumption
B. High response time
C. High input current
D. Balanced input offset voltage

The important feature of ICL8001 is low power consumption. It consumes power in the range of 30mw.

9. Which op-amp is preferred for applications like high-speed A-D converter and zero-crossing detector.

A. ICL8001
B. LM1414
C. µA311
D. µA670

µA670 is a high-speed differential voltage comparator with complementary TTL output. It has a typical response time of 16ns and operates from supplies of ±4.5v – ± 6.5v.

10. What is Barkhausen criterion for oscillation?

A. Aß > 1
B. Aß < 1
C. Aß = 1
D. Aß ≠ 1