A positive edge occurs when a digital waveform rises from a logic low (0) to a logic high (1). This brief transition period is used to synchronize timing in digital systems, telling flip-flops and registers exactly when to capture data. Because the transition is not instantaneous, it is measured by its rise time between specific voltage thresholds.
Heard on the job
Check if that flip-flop is clocking on the positive edge or the negative edge.
Also heard as
- rising edge
- leading edge
Related terms
Negative edge
A negative edge is the high-to-low transition of a digital signal.
Clock
A continuous square wave signal that synchronizes the timing of digital circuits.
Rise time
The time required for a signal to transition from a specified low state to a specified high state.
Edge-triggered
A digital input that responds only to the transition of a clock signal.