Question
Download Solution PDFIn _______, the flip-flop output transition serves as a source for triggering other flip-flops.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation-
Ripple Counter
A ripple counter is an asynchronous counter where only the first flip-flop is clocked by an external clock.
All subsequent flip-flops are clocked by the output of the preceding flip-flop.
Asynchronous counters are also called ripple-counters because of the way the clock pulse ripples its way through the flip-flops.
Only one flip-flop is applied with an external clock pulse and another flip-flop clock is obtained from the output of the previous flip-flop.
The flip-flop applied with external clock pulse act as LSB (Least Significant Bit) in the counting sequence.
An n-bit ripple counter can count up to 2n states. It is also known as MOD n counter.
A 3-bit Ripple counter using JK flip-flop –
In the above ripple counter, we can see the external clock is provided only to D0 FF for D1 FF, the clock is obtained from Q̅0 (output of D0 FF), and for D2 FF clock pulse is obtained from Q̅1 (output of D1 FF)
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