A method and system of providing a phase reference signal includes generating a reference signal having a reference frequency, modulating the reference signal at a modulation frequency lower than the reference frequency to obtain a modulated drive signal, receiving the modulated drive signal at a phase reference, and generating the phase reference signal based on the modulated drive signal. The pulsejet additionally includes a flow-turning device positioned over an end of the inlet. A slicer is included to remove a donor tissue to be processed by the processor. The multi-layered paint includes a minor layer and a color layer. Such predetermined temperature and amount of time may allow for the growth of a magnetic layer with a predetermined magnetic anisotropy.