Fft of square wave

1. What is the FFT of a square wave?
2. What is the frequency spectrum of a square wave?
3. How do you find the harmonic of a square wave?

What is the FFT of a square wave?

In the frequency domain, the overall average of a signal is its content at DC or 0Hz -- so that's why there's a peak at 0Hz. The FFT of a square wave that is centered on 0V has energy at every odd harmonic, starting at 1.

What is the frequency spectrum of a square wave?

It is 0.00063 v. It is important to note that the amplitudes of higher sine-wave-frequency components decrease with 1/f. If the transition-voltage range of the ideal square wave were to double to 0 v to 2 v, the amplitudes of each harmonic would double as well. There is one other special frequency value, 0 Hz.

How do you find the harmonic of a square wave?

A square wave consists of a fundamental sine wave (of the same frequency as the square wave) and odd harmonics of the fundamental. The amplitude of the harmonics is equal to 1/N where N is the harmonic (1, 3, 5, 7…). Each harmonic has the same phase relationship to the fundamental.