I mean, when integrating a square wave, it only makes sense that a triangular wave will be the result as square waves are periodic DC levels (C) and the integral of a constant is a constant multiplied by time plus another constant (C*t + D) . Seeing this further, integrating C*t + D, the result is C*t^2 + D*t + E.

The only true way to get a pure sinusoid has to be from a resonator (LC) circuit, so I am just wondering if people consider these quadratic "sinusoids" to be "good enough" approximations, and convenient because they make use of op amps?

Thanks,
JP

 

This was rather thoroughly discussed in a recent thread -- you can search for it and see what people had to say.

 

Thanks for the tip. Found it. http://forum.allaboutcircuits.com/attachment.php?attachmentid=31698&d=1309317017