A Logic Cookbook for Synthesis

Merge triggers and gates

Attibution: DivKid

An OR circuit will remain high as long as one input is high

You can combine two or more trigger and/or gate signals using OR logic. The result is similar to using a mixer, except that a mixer adds the signals together, resulting in potentially high amplitude, whereas the output of OR logic will always be either 0V or whatever it’s high voltage is (typically 5V, but designs may vary).

Note: with OR logic, gates that overlap are essentially merged (run together) to form a longer gate.

Example:

Video example (begins at 17:02):

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