Self-Sustained Micromechanical Oscillator with Linear Feedback

Changyao Chen, Damián H. Zanette, Jeffrey R. Guest, David A. Czaplewski, Daniel López
2016 Physical Review Letters  
Autonomous oscillators, such as clocks and lasers, produce periodic signals without any external frequency reference. In order to sustain stable periodic motions, there needs to be external energy supply as well as nonlinearity built into the oscillator to regulate the amplitude. Usually, nonlinearity is provided by the sustaining feedback mechanism, which also supplies energy, whereas the constituent resonator that determines the output frequency stays linear. Here we propose a new
more » ... ing scheme that relies on the nonlinearity originating from the resonator itself to limit the oscillation amplitude, while the feedback remains linear. We introduce a model to describe the working principle of the self-sustained oscillations and validate it with experiments performed on a nonlinear microelectromechanical (MEMS) based oscillator.
doi:10.1103/physrevlett.117.017203 pmid:27419587 fatcat:owpa36nvijdjvciq2n3moar2gm