Fourier Series

Any repetitive signal can be constructed by adding suitable sinusoids : its Fourier Series.

This web page allows you to select a signal and see how, as more sinusoids are added, the true function is approached.

Choose a function and it is plotted with its Fourier Series for up to n. The an and bn coefficients for the function are shown.

Press Sweep n and n will be increased gradually from 0..25.

Square Wave start at 0

SqWave centred at 0

Uneven Square Wave

SawTooth

Triangle Wave

n (0..25)