A J-K flip-flop with J = 1 and K = 1 has a 20 kHz clock input. The Q output is ________(a) Constantly LOW(b) Constantly HIGH(c) A 20 kHz square wave(d) A 10 kHz square waveThe question was posed to me in my homework.This is a very interesting question from Flip Flops topic in chapter Flip-Flops of Digital Circuits

A J-K flip-flop with J = 1 and K = 1 has a 20 kHz clock input. The Q o

1.	A J-K flip-flop with J = 1 and K = 1 has a 20 kHz clock input. The Q output is ________(a) Constantly LOW(b) Constantly HIGH(c) A 20 kHz square wave(d) A 10 kHz square waveThe question was posed to me in my homework.This is a very interesting question from Flip Flops topic in chapter Flip-Flops of Digital Circuits
Answer» Correct CHOICE is (d) A 10 KHZ SQUARE wave To EXPLAIN I would say: The flip flop is sensitive only to the positive or negative edge of the clock pulse. So, the flip-flop toggles whenever the clock is falling/rising at edge. This triggering of flip-flop during the transition state, is known as Edge-triggered flip-flop. Thus, the output curve has a time period twice that of the clock. Frequency is inversely related to time period and hence frequency gets halved.

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