Is there a difference between waveform and truth table to represent the values of a circuit?

For example:

enter image description here

Are there particular cases where one or the other should be used?


1 Answer 1


Both can convey the same information if you only want to describe the steady state behavior of a combinatorial logic circuit.

Waveform pictures additionally can convey time-dependent behaviors (a.k.a., transient behaviors) of circuits, and they often are drawn for that purpose. Also, they could be drawn to describe changing states of simple sequential logic circuits.


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