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Two J-K flip-flops with their J-K inputs tied HIGH are cascaded to be used as counters. After four input clock pulses, the binary count is ________a.10b.11c.00d.01

Question

Two J-K flip-flops with their J-K inputs tied HIGH are cascaded to be used as counters. After four input clock pulses, the binary count is ________a.10b.11c.00d.01

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Solution

The answer is (c) 00.

Here's the step-by-step explanation:

  1. A J-K flip-flop with J and K inputs tied HIGH is essentially a toggle flip-flop. It toggles its output on each clock pulse.

  2. If two such flip-flops are cascaded, the first flip-flop (FF1) will toggle its state on every clock pulse, while the second flip-flop (FF2) will toggle its state on every falling edge of the output of FF

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