  We describe and demonstrate a new oscillator topology, the parametric
feedback oscillator (PFO). The PFO paradigm is applicable to a wide variety of
nanoscale devices, and opens the possibility of new classes of oscillators
employing innovative frequency-determining elements, like such as
nanoelectromechanical systems (NEMS), facilitating integration with circuitry,
and reduction in cost and system size reduction. We show that the PFO topology
can also improve nanoscale oscillator performance by circumventing detrimental
effects that are otherwise imposed by the strong device nonlinearity in this
size regime.
