phase angle control

I'm looking into a way to construct a circuit that can generate ~200MHz negative voltage sine waves (8 channels), where there is 11 degrees of phase offset between the channels (0 deg, 11 deg, 22 deg, ...). I would like to be able to adjust the frequency, phase offset and possibly amplitude of...

Good day, I have a design problem I need to complete. Unfortunately it has been a long while since I have done a design in that area. I need help with this design.

Have this schematic for a Heater Control. Please direct me to an explanation for (R1 + C1/C2) and (R2 + C3). I cannot find any online papers about how to implement phase-angle control. I can only find lots of explanations as to what it is. Specifically, I want to know how would I modify them...