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Test: Asynchronous Counter - 2 - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test - Test: Asynchronous Counter - 2

Test: Asynchronous Counter - 2 for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Test: Asynchronous Counter - 2 questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Asynchronous Counter - 2 MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Asynchronous Counter - 2 below.
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Test: Asynchronous Counter - 2 - Question 1

How many natural states will there be in a 4-bit ripple counter?

Detailed Solution for Test: Asynchronous Counter - 2 - Question 1

In an n-bit counter, the total number of states = 2n.
Therefore, in a 4-bit counter, the total number of states = 24 = 16 states.

Test: Asynchronous Counter - 2 - Question 2

One of the major drawbacks to the use of asynchronous counters is that ____________

Detailed Solution for Test: Asynchronous Counter - 2 - Question 2

One of the major drawbacks to the use of asynchronous counters is that High-frequency applications are limited because of internal propagation delays. Propagation delay refers to the amount of time taken in producing an output when the input is altered.

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Test: Asynchronous Counter - 2 - Question 3

What happens to the parallel output word in an asynchronous binary down counter whenever a clock pulse occurs?

Detailed Solution for Test: Asynchronous Counter - 2 - Question 3

In an asynchronous counter, there isn’t any clock input. The output of 1st flip-flop is given to second flip-flop as clock input. So, in case of binary down counter the output word decreases by 1.

Test: Asynchronous Counter - 2 - Question 4

The terminal count of a typical modulus-10 binary counter is ____________

Detailed Solution for Test: Asynchronous Counter - 2 - Question 4

A binary counter counts or produces the equivalent binary number depending on the cycles of the clock input. Modulus-10 means count from 0 to 9. So, the terminal count is 9 (1001).

Test: Asynchronous Counter - 2 - Question 5

A 5-bit asynchronous binary counter is made up of five flip-flops, each with a 12 ns propagation delay. The total propagation delay (tp(total)) is ____________

Detailed Solution for Test: Asynchronous Counter - 2 - Question 5

Since a counter is constructed using flip-flops, therefore, the propagation delay in the counter occurs only due to the flip-flops. Each bit has propagation delay = 12ns. So, 5 bits = 12ns x 5 = 60ns.

Test: Asynchronous Counter - 2 - Question 6

A ripple counter’s speed is limited by the propagation delay of _____________

Detailed Solution for Test: Asynchronous Counter - 2 - Question 6

A ripple counter is something that is derived by other flip-flops. It’s like a series of Flip Flops. Output of one FF becomes the input of the next. Because ripple counter is composed of FF only and no gates are there other than FF, so only propagation delay of FF will be taken into account. Propagation delay refers to the amount of time taken in producing an output when the input is altered.

Test: Asynchronous Counter - 2 - Question 7

Internal propagation delay of asynchronous counter is removed by ____________

Detailed Solution for Test: Asynchronous Counter - 2 - Question 7

Propagation delay refers to the amount of time taken in producing an output when the input is altered. Internal propagation delay of asynchronous counter is removed by synchronous counter because clock input is given to each flip-flop individually in synchronous counter.

Test: Asynchronous Counter - 2 - Question 8

How many flip-flops are required to construct a decade counter?

Detailed Solution for Test: Asynchronous Counter - 2 - Question 8

Number of flip-flop required is calculated by this formula: 2(n-1) 
⇒ N< = 2n. 2= 16 and 2= 8,
therefore, 4 flip flops needed.

Test: Asynchronous Counter - 2 - Question 9

How many different states does a 3-bit asynchronous counter have?

Detailed Solution for Test: Asynchronous Counter - 2 - Question 9

In a n-bit counter, the total number of states = 2n.
Therefore, in a 3-bit counter, the total number of states = 23 = 8 states.

Test: Asynchronous Counter - 2 - Question 10

A ripple counter’s speed is limited by the propagation delay of ____________

Detailed Solution for Test: Asynchronous Counter - 2 - Question 10

A ripple counter is something that is derived by other flip-flops. Its like a series of Flip Flops. Output of one FF becomes the input of the next. Because ripple counter is composed of FF only and no gates are there other than FF, so only propagation delay of FF will be taken into account. Propagation delay refers to the amount of time taken in producing an output when the input is altered.

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