In
electronics
Electronics is a scientific and engineering discipline that studies and applies the principles of physics to design, create, and operate devices that manipulate electrons and other Electric charge, electrically charged particles. It is a subfield ...
, a signal edge is a transition of a
digital signal
A digital signal is a signal that represents data as a sequence of discrete values; at any given time it can only take on, at most, one of a finite number of values. This contrasts with an analog signal, which represents continuous values; ...
from low to high or from high to low:
* A rising edge (or positive edge) is the low-to-high transition.
* A falling edge (or negative edge) is the high-to-low transition.
In the case of a
pulse
In medicine, the pulse refers to the rhythmic pulsations (expansion and contraction) of an artery in response to the cardiac cycle (heartbeat). The pulse may be felt ( palpated) in any place that allows an artery to be compressed near the surfac ...
, which consists of two edges:
* The leading edge (or front edge) is the first edge of the pulse.
* The trailing edge (or back edge) is the second edge of the pulse.
See also
*
Flip-flop (electronics)
In electronics, flip-flops and latches are electronic circuit, circuits that have two stable states that can store state information – a bistable multivibrator. The circuit can be made to change state by signals applied to one or more control ...
, an edge-triggered circuit
*
Rise time
In electronics, when describing a voltage or current step function, rise time is the time taken by a signal to change from a specified low value to a specified high value. These values may be expressed as ratiosSee for example , and . or, equiva ...
, for a signal transition
References
Digital electronics
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