Question

Using a D Flip-flop, connect the inverted output, Qˉ, to the input D. Apply a 100 Hz clock o the clock input. Draw the output waveform of the normal output Q.

Answer 1

A D Flip-flop connected with its Qˉ output to the D input, and a 100 Hz clock applied, will output a 50 Hz square wave. The output Q waveform alternates between high and low, each lasting for 10 ms.

Step-by-step explanation:

The student's question involves connecting the inverted output (Qˉ) of a D Flip-flop to its input (D) and applying a 100 Hz clock to the clock input. When this is done, the D Flip-flop will act as a 'divide by 2' counter because the output will toggle its state with every clock pulse.

If we draw the output waveform of the normal output Q, we will see a square wave with a frequency that is half of the clock frequency. For a 100 Hz clock input, the output frequency of the Q output will therefore be 50 Hz. The waveform starts at a high level for one period of the output frequency, drops to a low level for the next period, and continues this pattern indefinitely.

Output Waveform:

• Time high: 10 ms (half the period of the output frequency)
• Time low: 10 ms (the other half of the period)