Dear Alain,

Thanks for your reply. I just don't want to go the conventional (traditional)way. I have used MAX038 (big brother of XR8038) earlier but it was a pure analogue design with some fancy digital control as you mentioned. This project is all about low cost and best control. In fact with a PC side software the lookup tables could be modified to generate other waveforms as well. I am asking you guys for the possibility on a 16F. Storing one quadrant of data in the lookup table and building the sinewave is easy. But while modulating it, for a 8bit modulation index, I am doubtful on the processor througput considering 16/32 bit math. If there is an easy way out to do this in software please guide.