Counter Interview Question Answer - 4

What is reason behind the name ‘Twisted ring counter’?

OR

How the Johnson counter is constructed? 

Twisted ring counter

The twisted counter is constructed by using serial in serial out shift register. The Q output of each stage is connected to the D input of the next stage but the output Q bar of the last stage is connected to the D input of the first stage therefore it is called as twisted ring counter. 

Counter Interview Question Answer - 3

Explain the term : Loading of counter
Loading of counter
The presetting of the counter is called as loading of the counter.

Describe the function of look ahead carry? Why it is necessary?
Function of look ahead carry
The output of the up counter is called as carry. This carry is brought forward to next stage by AND gate therefore the output of the counter Q and output of the proceeding counter is given at the input of AND gate. The output of the

Counter Interview Question Answer - 2

How many flip flops are required for 2^N count?

One flip flop counts up to 2 pulses, two flip flops count up to 2² = 4 pulses. Similarly N flip flop count up to 2^N pulses.

What to do for invalid states in the synchronous and asynchronous counter?

The synchronous and asynchronous counter goes from invalid state to valid state by providing external logic circuit which properly reset each flip flop.

Counter Interview Question Answer - 1

Describe the function of the counter.

Function of the counter

The function of the counter is to count pulses.

It consists of set of flip flops whose state changes according to input to the counter.

How the counter is classified?