Question
16. What do we mean when we say that a sequential circuit is edge-triggered rather than level-triggered?
Answer
The sequential circuits use a clock signal to order the event happened. The sequential circuit uses the previous input to determine the output on the occurrence clock signal.
Clock:
A clock is an input signal that has a series of pulses with a precise pulse width and an interval between the pulses. The sequential circuits use two types of clocks as given below:
- Edge-triggered
A Level-triggering is defined as the output changes the state whenever the clock signal is either HIGH or LOW. The level-triggering is used in Latches.
An Edge-triggering is defined as the output changes the state on the raising edge or the falling edge of the clock signal. The Edge-triggering is used in Flip-flops.
A sequential circuit is said to be edge-triggered rather than level-triggered when it is constructed with flip-flops that uses edge-triggering.