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In digital circuits, Parallel Counters are series of n flip-flops. It has 2n states. The notion of the word parallel is that, a clock pulse is given at-a-time to all the flip-flops. It may be fed directly. or alternatively, it may be ANDed with some other variable (for example output of previous stage, some other stage etc.).

One may have a look at this image :

http://www.csbdu.in/virtual/DIGITAL%20MUP/3.2_clip_image015.jpg

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Q: What is parallel counter?
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