Yea! I'm making a bit of progress on that front as well.
I've gotten both sin and cosine ouputs to work simultaneously. Here's a sample of the output. This output is actually a pair of waves formed from the tips of the carrier frequency. They are offset 90 degrees by the resolver. My circuit saves just the tips to form the waveforms shown in this 'scope capture.
Both were made by spinning the rotor as fast as I could by hand. In the first one, I spun the rotor clockwise and the speed reported on the scope is 6.94 Hz. The resolver puts out two cycles/revolution, so this works out to (6.94/2)(60) = 208.2 RPM. In the second pic, I spun the rotor counterclockwise, and the speed reported is 7.35 Hz, or 220.5 RPM. Notice how one wave is leading in one direction, or lagging in the opposite direction. I do need to make the waves the same amplitude and offset, but that's just tuning with resistors.
