Propagation Delay (tp , tpd, tdelay) defines how quickly a gate responds to a change in its inputs.
- It expresses the delay experienced by a signal when passing through a gate
- tpd is measured between the 50% transition points of the input and output waveforms.
Rise Time (tr ) is the time it takes a signal to rise from 10% to 90% of its full level.
Fall Time (tf ) is the time it takes a signal to fall from 90% to 10% of its full level.
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