In other words, the event is triggered whenever a clock level is encountered. LED can turn on at any time during the high voltage. Assume lighting an LED according to level triggering. Thus, when an event triggers at the clock level, we call it level triggering. In other words, the output changes during either high voltage or low voltage period- not during the edges like in edge triggering. In the sequential circuit, if the output changes during the high voltage period or low voltage period, it is called level triggering.
Taking some examples S-R flip flop, J-K flip flop and D flip flop are some common examples for flip flops with edge triggering. In this scenario, the LED lights on every time the signal transits from low voltage to high voltage. For example, assume lighting an LED according to the edge triggering. Thus, when an event is triggered at the rising edge or falling edge, we call it edge triggering. And, the edge that changes the voltage from high level to the low level is called falling edge (negative edge). Here, the edge that changes the voltage from low level to the high level is called rising edge (positive edge). In a sequential circuit, if the output changes when the signal transits from a high level to a low level or from a low level to a high level, we call it edge triggering.
– Comparison of key differences Key TermsĮdge Triggering, Level Triggering, Sequential Circuit Difference Between Edge and Level Triggering Furthermore, these voltage levels help to determine the triggering type. One is a high voltage (V H), and the other is low voltage (V L). There are two levels in a clock pulse or a signal. There are two types of triggering as edge and level triggering. In a sequential circuit, the output changes depending on the triggering. The main difference between edge and level triggering is that in edge triggering, the output of the sequential circuit changes during the high voltage period or low voltage period while, in level triggering, the output of the sequential circuit changes during transits from the high voltage to low voltage or low voltage to high voltage.
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