DEMO 1 - Slide the mouse over the gray rectangles to see how the ideal bandpass filter can be used to obtain the harmonics of the periodic signal x(t).
DEMO 2 - Slide the mouse over the gray rectangles to see how the harmonics from Demo 1 add up to produce the periodic signal x(t).
DEMO 3 - Slide the mouse over the gray rectangles to see how increasing the passband of the ideal lowpass filter affects its steady state response to the periodic signal x(t).
