Triangle-to-sine wave conversion with MOS technology

A description is given of MOS circuit design techniques for nonlinear analog circuits that perform a triangle-to-sine wave conversion. These techniques may also be applied to synthesizing other functions. Design techniques for compensating the conversion for variations in temperature, processing, and triangle wave amplitude are also presented. Results from simulation and monolithic circuit fabrication are reported which show that a sinusoidal approximation with a total harmonic content of 0.2% at 1 kHz is practical. The test circuit is powered from /spl plusmn/5 V supplies and displays a bandwidth of 1.1 MHz.