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Logic Gates

Q1:

What is the name of a digital circuit that produces several repetitive digital waveforms?

A an inverter

B an OR gate

C a Johnson shift counter

D an AND gate

ANS:C - a Johnson shift counter

There are two types of shift counters.

1) Straight shift counter (only able to move 1 bit, i.e. there can be only one "1" in all the bits).
2) Johnson counter (able to circulate a particular pattern irrespective of number of "1"s).



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