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Signal edges shown in rectangular pulse amplitude modulation with polar non-return-to-zero, inverted coding waveform
In electronics, a signal edge is a transition of a digital signal from low to high or from high to low:
A rising edge (or positive edge) is the low-to-high transition.[1]
A falling edge (or negative edge) is the high-to-low transition.[1]
In the case of a pulse, 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.
^ abBerger, Arnold S. (20 May 2005), Hardware and Computer Organization, p. 32, ISBN 978-0-7506-7886-5
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