Square wave

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Example of an ideal "square wave"
Example of an ideal "square wave"

A non-sinusoidal waveform, most typically encountered in digital electronics and signal processing.

Although an ideal square wave alternates regularly and instantaneously between two levels, asymmetrical square waves (the high period of the waveform is different from the low period) are very common.

Square waves are a naturally product of binary (two-level) logic devices and are commonly used as timing references or "clock signals". Their fast transitions make them suitable for triggering synchronous logic circuits at precisely determined intervals.

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