Topic: Digital Circuits
The output of the circuit shown below is (1 MHz Oscillator -> Divider /10^6 -> Flip Flop -> Schmitt trigger -> Output)
- A. A pulse train of duration 0.5 sec
- B. A pulse train of duration 2 sec
- C. A pulse train of duration 1 sec
- D. A pulse train of duration 5 sec
Answer: B. A pulse train of duration 2 sec
Explanation: The 1 MHz oscillator output is divided by 10^6, resulting in a 1 Hz frequency. The flip-flop acts as a toggle (divide-by-2 circuit), changing state on the clock edges, which yields an output frequency of 0.5 Hz. The time period (duration of one full cycle) is T = 1 / f = 1 / 0.5 = 2 seconds.