what is counters ?

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Counters are sequential circuits that keep record of the clock pulses sent. Counter consists of a group of flip-flops. It has a characteristic internal sequence of states through which it passes if a series of clock pulses are applied to it. Ring counter is the most widely used shift register counter which is the basic ring counter as well as the twisted ring counter. MSI counters are of two types namely asynchronous counters and synchronous counters.

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