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A square wave is a non-sinusoidal periodic waveform in which the amplitude alternates at a steady frequency between fixed minimum and maximum values. The square wave is a special case of a pulse wave which allows arbitrary durations at minimum and maximum. The ratio of the high period to the total period of a pulse wave is called the duty cycle. A true square wave has a 50% duty cycle (equal high and low periods).

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LCR circuit with squarewave input: Why does the output take a decreasing amplitude through e...

So there should be 5 peaks between each cycle of the square wave right? Due to it being the 5th harmonic. … That's about all I understand, and I'm really struggling to find good sources which discuss the square-wave input to tuned bandpass filters. …
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