Amplitude of first harmonic of a square wave, $2/\pi$ or $4/\pi$?

1. What is the first harmonic of a square wave?
2. What is the harmonic of a square wave?
3. Which harmonics are not available in the FFT frequency spectrum of a square wave with 50% duty cycle?
4. How do you find the equation of a square wave?

What is the first harmonic of a square wave?

For example, an ideal square wave with 50% duty-cycle and 0 v to 1 v transition has a first harmonic amplitude of 0.63 v. The amplitude of the third harmonic is 0.21 v.

What is 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.

Which harmonics are not available in the FFT frequency spectrum of a square wave with 50% duty cycle?

These particular harmonics are missing from the square wave because of its duty cycle . A duty cycle is the percentage of the waveform that occurs above the zero axis. The duty cycle of a square wave is always 50%, or 1/2. Because the duty cycle is 1/2, every second harmonic is not present.

How do you find the equation of a square wave?

Here, T is the period of the square wave and f is its frequency, which are related by the equation f = 1/T.