I have a square form signal that can change frequency from 100kHz to 200kHz (more precisely, the '1' is coded by 200kHz part (2 oscillations) and '0' is coded by 100kHz). The amplitude is about 2.5V. How can i change the waveform of the signal to sine, but preserve frequency changing? I think that the most common way is to use two integrators: passive (or active) to convert square to saw and then active (based on op-amp) to convert saw to sine. I'm not an electrical engineer, and this solution I've find by reading articles on the net. Is this correct or may be exists more correct or easier solutions? Just need to determine if I'm going the correct way.
Sorry for my bad english, stupid question and thanks in advance.