Greetings! Could anyone possibly explain, from National Semiconductor's AN-263 "Sine Wave Generation Techniques" page 11 - Logarithmic Shaping, how the "logarithmic relationship between Vbe and collector current in transistors" shapes a triangle wave to an approximation of a sine wave? Maybe my math isn't up to the task, but I don't see how a logarithmic response becomes a sine wave. http://www.national.com/an/AN/AN-263.pdf I wasn't able to get this shaper working, although admittedly I changed it based on what I have at hand. Still, I always understand circuits better when I know the why as well as the how. Thanks!