> A true square wave would require an infinite series of discrete sine components, wouldn't it? Yes, in principle, it represents an infinite series: http://en

> A true square wave would require an infinite series of discrete sine components, wouldn't it? Yes, in principle, it represents an infinite series: http://en.wikipedia.org/wiki/Square_wave#Examining_the_square_wave http://en.wikipedia.org/wiki/Square_wave#Examining_the_squar... But as you can see, the higher harmonics decline quickly in energy.