constant amplitude squarewave to sawtooth converter

Most electronic organs use squarewaves as the basic signal from which all the organ voices are obtained by filtering, simply because squarewaves are easy to generate and process. However, from a musical point of view, the sawtooth is a much more useful waveform, since it contains both odd and even harmonics of the fundamental frequency, whereas the squarewave contains only the odd harmonics. The main problems involved in generating sawtooth waveforms for organ circuits have been those of cost and reproducibility. However, the circuit described here, for which a patent is pending, suffers from none of these drawbacks and could, in principle, be integrated into a microcircuit.